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Amplitude analysis of the decays d^(0)→π^(+)π^(−)π^(+)π^(−)and d^(0)→π^(+)π^(−)π^(0)π^(0)

Chinese Physics C 2024年第8期48卷 6-33页

作者： M.Ablikim M.N.Achasov P.Adlarson O.Afedulidis X.C.Ai R.Aliberti A.Amoroso Q.An Y.Bai O.Bakina I.Balossino Y.Ban H.-R.Bao V.Batozskaya k.Begzsuren N.Berger M.Berlowski M.Bertani d.Bettoni f.Bianchi E.Bianco A.Bortone I.Boyko R.A.Briere A.Brueggemann H.Cai X.Cai A.Calcaterra G.f.Cao N.Cao S.A.Cetin j.f.Chang W.L.Chang G.R.Che G.Chelkov C.Chen C.H.Chen Chao Chen G.Chen H.S.Chen M.L.Chen S.j.Chen S.L.Chen S.M.Chen t.Chen X.R.Chen X.t.Chen Y.B.Chen Y.Q.Chen Z.j.Chen Z.Y.Chen S.k.Choi X.Chu G.Cibinetto f.Cossio j.j.Cui H.L.dai j.P.dai A.dbeyssi R.E.de Boer d.dedovich C.Q.deng Z.Y.deng A.denig I.denysenko M.destefanis f.de Mori B.fang S.S.fang W.X.fang Y.fang Y.Q.fang R.farinelli L.fava f.feldbauer G.felici C.Q.feng j.H.feng Y.t.feng k.fischer M.fritsch C.d.fu j.L.fu Y.W.fu H.Gao Y.N.Gao Yang Gao S.Garbolino I.Garzia P.t.Ge Z.W.Ge C.Geng E.M.Gersabeck B.ding X.X.ding Y.ding Y.ding j.dong L.Y.dong M.Y.dong X.dong M.C.du S.X.du Z.H.duan P.Egorov Y.H.fan j.fang jA.Gilman k.Goetzen L.Gong W.X.Gong W.Gradl S.Gramigna M.Greco M.H.Gu Y.t.Gu C.Y.Guan Z.L.Guan A.Q.Guo L.B.Guo M.j.Guo R.P.Guo Y.P.Guo A.Guskov j.Gutierrez k.L.Han t.t.Han X.Q.Hao f.A.Harris k.k.He k.L.He f.H.Heinsius C.H.Heinz Y.k.Heng C.Herold t.Holtmann P.C.Hong G.Y.Hou X.t.Hou Y.R.Hou Z.L.Hou B.Y.hu H.M.hu j.f.hu t.hu Y.hu G.S.huang k.X.huang L.Q.huang X.t.huang Y.P.huang t.hussain f.H\"olzken N.H\"usken N.in der Wiesche M.Irshad j.jackson S.janchiv j.H.jeong Q.ji Q.P.ji W.ji X.B.ji X.L.ji Y.Y.ji X.Q.jia Z.k.jia d.jiang H.B.jiang P.C.jiang S.S.jiang t.j.jiang X.S.jiang Y.jiang j.B.jiao j.k.jiao Z.jiao S.jin Y.jin M.Q.jing X.M.jing t.johansson S.kabana N.kalantar-Nayestanaki X.L.kang X.S.kang M.kavatsyuk B.C.ke V.khachatryan A.khoukaz R.kiuchi O.B.kolcu B.kopf M.kuessner X.kui A.kupsc W.k\"uhn j.j.Lane P.Larin L.Lavezzi t.t.Lei Z.H.Lei H.Leithoff M.Lellmann t.Lenz C.Li C.Li C.H.Li Cheng Li d.M.Li f.Li G.Li H.Li H.B.Li H.j.Li H.N.Li hui Li j.R.Li j.S.Li k.Li L.j.Li L.k.Li Lei Li M.H.Li P.R.Li Q.M.Li Q.X.Li R.Li S.X.Li t.Li W.d.Li W.G.Li X.Li X.H.Li X.L.Li X.Y.Li Y Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Beihang University Beijing 100191China Bochum Ruhr-University D-44780 BochumGermany Budker Institute of Nuclear Physics SB RAS(BINP) Novosibirsk 630090Russia Carnegie Mellon University PittsburghPennsylvania 15213USA Central China Normal University Wuhan 430079China Central South University Changsha 410083China China Center of Advanced Science and technology Beijing 100190China China University of Geosciences Wuhan 430074China Chung-Ang University Seoul06974Republic of Korea COMSAtS University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan fudan University Shanghai 200433China GSI Helmholtzcentre for Heavy Ion Research GmbH D-64291 DarmstadtGermany Guangxi Normal University Guilin 541004China Guangxi University Nanning 530004China Hangzhou Normal University Hangzhou 310036China Hebei University Baoding 071002China Helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany Henan Normal University Xinxiang 453007China Henan University Kaifeng 475004China Henan University of Science and technology Luoyang 471003China Henan University of technology Zhengzhou 450001China huangshan College Huangshan 245000China hunan Normal University Changsha 410081China hunan University Changsha 410082China Indian Institute of technology Madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA INfN Laboratori Nazionali di frascati INFN Laboratori Nazionali di FrascatiI-00044FrascatiItaly INfN Laboratori Nazionali di frascati INFN Sezione di PerugiaI-06100PerugiaItaly INfN Laboratori Nazionali di frascati University of PerugiaI-06100PerugiaItaly INfN Sezione di ferrara INFN Sezione di FerraraI-44122FerraraItaly INfN Sezione di ferrara University of FerraraI-44122FerraraItaly Inner Mongolia University Hohhot 010021China Institute of Modern Physics Lanzhou 730000China Institute of Physics and technology Peace Avenue 54BUlaanbaatar 13330Mongolia Instituto de A

Using e^(+)e^(−)annihilation data corresponding to an integrated luminosity of 2.93 fb^(−1)taken at the center-of-mass energy√s=3.773 GeV with the BESIII detector,a joint amplitude analysis is performed on the decays d^(0)→π^(+)π^(−)π^(+)π^(−)and d^(0)→π^(+)π^(−)π^(0)π^(0)(non-η).the fit fractions of individual components are obtained,and large interferences among the dominant components of the decays d^(0)→a_(1)(1260)π,d^(0)→π(1300)π,d^(0)→ρ(770)ρ(770),and d^(0)→2(ππ)_(S)are observed in both *** the obtained amplitude model,the CP-even fractions of d^(0)→π^(+)π^(−)π^(+)π^(−)and d^(0)→π^(+)π^(−)π^(0)π^(0)(non-η)are determined to be(75.2±1.1_(stat).±1.5_(syst.))%and(68.9±1.5_(stat).±2.4_(syst.))%,*** branching fractions of d^(0)→π^(+)π^(−)π^(+)π^(−)and d^(0)→π^(+)π^(−)π^(0)π^(0)(non-η)are measured to be(0.688±0.010_(stat.)±0.010_(syst.))%and(0.951±0.025_(stat.)±0.021_(syst.))%,*** amplitude analysis provides an important model for the binning strategy in measuring the strong phase parameters of d^(0)→4πwhen used to determine the CkM angleγ(ϕ_(3))via the B^(−)→dk^(−)decay.

关键词： BESIII d^(0)meson decays amplitude analysis CP-even fraction

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determination of the number ofψ(3686)events taken at BESⅢ

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Chinese Physics C 2024年第9期48卷 8-20页

作者： M.Ablikim M.N.Achasov P.Adlarson O.Afedulidis X.C.Ai R.Aliberti A.Amoroso Q.An Y.Bai O.Bakina I.Balossino Y.Ban H.-R.Bao V.Batozskaya k.Begzsuren N.Berger M.Berlowski M.Bertani d.Bettoni f.Bianchi E.Bianco A.Bortone I.Boyko R.A.Briere A.Brueggemann H.Cai X.Cai A.Calcaterra G.f.Cao N.Cao S.A.Cetin j.f.Chang G.R.Che G.Chelkov C.Chen C.H.Chen Chao Chen G.Chen H.S.Chen H.Y.Chen M.L.Chen S.j.Chen S.L.Chen S.M.Chen t.Chen X.R.Chen X.t.Chen Y.B.Chen Y.Q.Chen Z.j.Chen Z.Y.Chen S.k.Choi G.Cibinetto f.Cossio j.j.Cui H.L.dai j.P.dai A.dbeyssi R.E.de Boer d.dedovich C.Q.deng Z.Y.deng A.denig I.denysenko M.destefanis f.de Mori B.ding X.X.ding Y.ding Y.ding j.dong L.Y.dong M.Y.dong X.dong M.C.du S.X.du Y.Y.duan Z.H.duan P.Egorov Y.H.fan j.fang j.fang S.S.fang W.X.fang Y.fang Y.Q.fang R.farinelli L.fava f.feldbauer G.felici C.Q.feng j.H.feng Y.t.feng M.fritsch C.d.fu j.L.fu Y.W.fu H.Gao X.B.Gao Y.N.Gao Yang Gao S.Garbolino I.Garzia L.Ge P.t.Ge Z.W.Ge C.Geng E.M.Gersabeck A.Gilman k.Goetzen L.Gong W.X.Gong W.Gradl S.Gramigna M.Greco M.H.Gu Y.t.Gu C.Y.Guan Z.L.Guan A.Q.Guo L.B.Guo M.j.Guo R.P.Guo Y.P.Guo A.Guskov j.Gutierrez k.L.Han t.t.Han f.Hanisch X.Q.Hao f.A.Harris k.k.He k.L.He f.H.Heinsius C.H.Heinz Y.k.Heng C.Herold t.Holtmann P.C.Hong G.Y.Hou X.t.Hou Y.R.Hou Z.L.Hou B.Y.hu H.M.hu j.f.hu S.L.hu t.hu Y.hu G.S.huang k.X.huang L.Q.huang X.t.huang Y.P.huang t.hussain f.Hölzken N.Hüsken N.in der Wiesche j.jackson S.janchiv j.H.jeong Q.ji Q.P.ji W.ji X.B.ji X.L.ji Y.Y.ji X.Q.jia Z.k.jia d.jiang H.B.jiang P.C.jiang S.S.jiang t.j.jiang X.S.jiang Y.jiang j.B.jiao j.k.jiao Z.jiao S.jin Y.jin M.Q.jing X.M.jing t.johansson S.kabana N.kalantar-Nayestanaki X.L.kang X.S.kang M.kavatsyuk B.C.ke V.khachatryan A.khoukaz R.kiuchi O.B.kolcu B.kopf M.kuessner X.kui N.kumar A.kupsc W.kühn j.j.Lane P.Larin L.Lavezzi t.t.Lei Z.H.Lei M.Lellmann t.Lenz C.Li C.Li C.H.Li Cheng Li d.M.Li f.Li G.Li H.B.Li H.j.Li H.N.Li hui Li j.R.Li j.S.Li ke Li L.j.Li L.k.Li Lei Li M.H.Li P.R.Li Q.M.Li Q.X.Li R.Li S.X.Li t.Li W.d.Li W.G.Li X.Li X.H.Li X.L.Li X.Z.Li Xi Institute of High Energy Physics Beijing 100049China Beihang University Beijing 100191China Bochum Ruhr-University D-44780BochumGermany Budker Institute of Nuclear Physics SB RAS(BINP) Novosibirsk 630090Russia Carnegie Mellon University PittsburghPennsylvania 15213USA Central China Normal University Wuhan 430079China Central South University Changsha 410083China China Center of Advanced Science and technology Beijing 100190China China University of Geosciences Wuhan 430074China Chung-Ang University Seoul06974Republic of Korea COMSAtS University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000LahorePakistan fudan University Shanghai 200433China GSI Helmholtzcentre for Heavy Ion Research GmbH D-64291DarmstadtGermany Guangxi Normal University Guilin 541004China Guangxi University Nanning 530004China Hangzhou Normal University Hangzhou 310036China Hebei University Baoding 071002China Helmholtz Institute Mainz Staudinger Weg 18D-55099MainzGermany Henan Normal University Xinxiang 453007China Henan University Kaifeng 475004China Henan University of Science and technology Luoyang 471003China Henan University of technology Zhengzhou 450001China huangshan College Huangshan 245000China hunan Normal University Changsha 410081China hunan University Changsha 410082China Indian Institute of technology Madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA INfN Laboratori Nazionali di frascati (A)INFN Laboratori Nazionali di FrascatiI-00044FrascatiItaly(B)INFN Sezione di PerugiaI-06100PerugiaItaly(C)University of PerugiaI-06100PerugiaItaly INfN Sezione di ferrara (A)INFN Sezione di FerraraI-44122FerraraItaly(B)University of FerraraI-44122FerraraItaly Inner Mongolia University Hohhot 010021China Institute of Modern Physics Lanzhou 730000China Institute of Physics and technology Peace Avenue 54BUlaanbaatar 13330Mongolia Instituto de Alta Investigación Universidad de TarapacáCasilla 7DArica 1000000Chile jilin University Changchun 130012China joha

the number ofψ(3686)events collected by the BESⅢdetector during the 2021 run period is determined to be(2259.3±11.1)×10~6 by counting inclusiveψ(3686)hadronic *** uncertainty is systematic and the statistical uncertainty is ***,the numbers ofψ(3686)events collected during the 2009 and 2012run periods are updated to be(107.7±0.6)×10~6 and(345.4±2.6)×10~6,*** numbers are consistent with the previous measurements within one standard *** total number ofψ(3686)events in the three data samples is(2712.4±14.3)×10~6.

关键词： ψ(3686) inclusive process Hadronic events BESⅢdetector

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Performance and calibration of quark/gluon-jet taggers using 140 fb^(-1) of pp collisions at √s=13 teV with the AtLAS detector

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Chinese Physics C 2024年第2期48卷 1-25页

作者： G. Aad B. Abbott k. Abeling N.j. Abicht S.H. Abidi A. Aboulhorma H. Abramowicz H. Abreu Y. Abulaiti B.S. Acharya C. Adam Bourdarios L. Adamczyk S.V. Addepalli M.j. Addison j. Adelman A. Adiguzel t. Adye A.A. Affolder Y. Afik M.N. Agaras j. Agarwala A. Aggarwal C. Agheorghiesei A. Ahmad f. Ahmadov W.S. Ahmed S. Ahuja X. Ai G. Aielli A. Aikot M. Ait tamlihat B. Aitbenchikh I. Aizenberg M. Akbiyik t.P.A. Åkesson A.V. Akimov d. Akiyama N.N. Akolkar k. Al khoury G.L. Alberghi j. Albert P. Albicocco G.L. Albouy S. Alderweireldt M. Aleksa I.N. Aleksandrov C. Alexa t. Alexopoulos f. Alfonsi M. Algren M. Alhroob B. Ali H.M.j. Ali S. Ali S.W. Alibocus M. Aliev G. Alimonti W. Alkakhi C. Allaire B.M.M. Allbrooke j.f. Allen C.A. Allendes flores P.P. Allport A. Aloisio f. Alonso C. Alpigiani M. Alvarez Estevez A. Alvarez fernandez M. Alves Cardoso M.G. Alviggi M. Aly Y. Amaral Coutinho A. Ambler C. Amelung M. Amerl C.G. Ames d. Amidei S.P. Amor dos Santos k.R. Amos V. Ananiev C. Anastopoulos t. Andeen j.k. Anders S.Y. Andrean A. Andreazza S. Angelidakis A. Angerami A.V. Anisenkov A. Annovi C. Antel M.t. Anthony E. Antipov M. Antonelli f. Anulli M. Aoki t. Aoki j.A. Aparisi Pozo M.A. Aparo L. Aperio Bella C. Appelt A. Apyan N. Aranzabal S.j. Arbiol Val C. Arcangeletti A.t.H. Arce E. Arena j-f. Arguin S. Argyropoulos j.-H. Arling O. Arnaez H. Arnold G. Artoni H. Asada k. Asai S. Asai N.A. Asbah j. Assahsah k. Assamagan R. Astalos S. Atashi R.j. Atkin M. Atkinson H. Atmani P.A. Atmasiddha k. Augsten S. Auricchio A.d. Auriol V.A. Austrup G. Avolio k. Axiotis G. Azuelos d. Babal H. Bachacou k. Bachas A. Bachiu f. Backman A. Badea P. Bagnaia M. Bahmani A.j. Bailey V.R. Bailey j.t. Baines L. Baines O.k. Baker E. Bakos d. Bakshi Gupta V. Balakrishnan R. Balasubramanian E.M. Baldin P. Balek E. Ballabene f. Balli L.M. Baltes W.k. Balunas j. Balz E. Banas M. Bandieramonte A. Bandyopadhyay S. Bansal L. Barak M. Barakat E.L. Barberio d. Barberis M. Barbero M.Z. Barel k.N. Barends t. Barillari M-S. Barisits t. Barklow P. Baron d.A. Baron Mo the AtLAS Collaboration

the identification of jets originating from quarks and gluons,often referred to as quark/gluon tagging,plays an important role in various analyses performed at the Large Hadron Collider,as Standard Model measurements and searches for new particles decaying to quarks often rely on suppressing a large gluon-induced *** paper describes the measurement of the efficiencies of quark/gluon taggers developed within the AtLAS Collaboration,using √s=13 teV proton–proton collision data with an integrated luminosity of 140 fb^(-1) collected by the AtLAS *** taggers with high performances in rejecting jets from gluon over jets from quarks are studied:one tagger is based on requirements on the number of inner-detector tracks associated with the jet,and the other combines several jet substructure observables using a boosted decision tree.A method is established to determine the quark/gluon fraction in data,by using quark/gluon-enriched subsamples defined by the jet *** in tagging efficiency between data and simulation are provided for jets with transverse momentum between 500 GeV and 2 teV and for multiple tagger working points.

关键词： AtLAS jEt QUARk GLUON tAGGING

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Measurement of the integrated luminosity of the Phase 2 data of the Belle Ⅱ experiment

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Chinese Physics C 2020年第2期44卷 1-12页

作者： f.Abudinén I.Adachi P.Ahlburg H.Aihara N.Akopov A.Aloisio f.Ameli L.Andricek N.Anh ky d.M.Asner H.Atmacan t.Aushev V.Aushev t.Aziz k.Azmi V.Babu S.Baehr S.Bahinipati A.M.Bakich P.Bambade Sw.Banerjee S.Bansal V.Bansal M.Barrett j.Baudot A.Beaulieu j.Becker P.k.Behera j.V.Bennett E.Bernieri f.U.Bernlochner M.Bertemes M.Bessner S.Bettarini V.Bhardwaj f.Bianchi t.Bilka S.Bilokin d.Biswas G.Bonvicini A.Bozek M.Bračko P.Branchini N.Braun t.E.Browder A.Budano S.Bussino M.Campajola L.Cao G.Casarosa C.Cecchi d.Červenkov M.-C.Chang P.Chang R.Cheaib V.Chekelian Y.Q.Chen Y.-t.Chen B.G.Cheon k.Chilikin H.-E.Cho k.Cho S.Cho S.-k.Choi S.Choudhury d.Cinabro L.Corona L.M.Cremaldi S.Cunliffe t.Czank f.dattola E.de La Cruz-Burelo G.de Nardo M.de Nuccio G.de Pietro R.de Sangro M.destefanis S.dey A.de Yta-Hernandez f.di Capua S.di Carlo j.dingfelder Z.doležal I.domínguez jiménez t.V.dong k.dort S.dubey S.duell S.Eidelman M.Eliachevitch t.ferber d.ferlewicz G.finocchiaro S.fiore A.fodor f.forti A.frey B.G.fulsom M.Gabriel E.Ganiev M.Garcia-Hernandez R.Garg A.Garmash V.Gaur A.Gaz U.Gebauer A.Gellrich j.Gemmler t.Geßler R.Giordano A.Giri B.Gobbo R.Godang P.Goldenzweig B.Golob P.Gomis P.Grace W.Gradl E.Graziani d.Greenwald C.Hadjivasiliou S.Halder k.Hara t.Hara O.Hartbrich k.Hayasaka H.Hayashii C.Hearty M.t.Hedges I.Heredia de la Cruz M.Hernández Villanueva A.Hershenhorn t.Higuchi E.C.Hill H.Hirata M.Hoek S.Hollitt t.Hotta C.-L.Hsu Y.hu k.huang t.Iijima k.Inami G.Inguglia j.Irakkathil jabbar A.Ishikawa R.Itoh M.Iwasaki Y.Iwasaki S.Iwata P.jackson W.W.jacobs d.E.jaffe E.-j.jang H.B.jeon S.jia Y.jin C.joo j.kahn H.kakuno A.B.kaliyar G.karyan Y.kato t.kawasaki H.kichimi C.kiesling B.H.kim C.-H.kim d.Y.kim S.-H.kim Y.k.kim Y.kim t.d.kimmel k.kinoshita C.kleinwort B.knysh P.kodyš t.koga I.komarov t.konno S.korpar d.kotchetkov N.kovalchuk t.M.G.kraetzschmar P.križan R.kroeger j.f.krohn P.krokovny W.kuehn t.kuhr M.kumar R.kumar k.kumara S.kurz A.kuzmin Y.-j.kwon S.Lacaprara Y.-t.Lai C.La Licata k.Lalwani L.Lanceri j.S.Lange k.Lautenbach I.-S.Le Beihang University Beijing 100191 Brookhaven National Laboratory UptonNew York 11973 Budker Institute of Nuclear Physics SB RAS Novosibirsk 630090 Centro de Investigacion y de Estudios Avanzados del Instituto Politecnico Nacional Mexico City 07360 faculty of Mathematics and Physics Charles University12116 Prague Chiba University Chiba 263-8522 Consejo Nacional de Ciencia y tecnología Mexico City 03940 deutsches Elektronen–Synchrotron 22607 Hamburg duke University DurhamNorth Carolina 27708 Earthquake Research Institute University of TokyoTokyo 113-0032 forschungszentrum jülich 52425 Jülich department of Physics Fu Jen Catholic UniversityTaipei 24205 key Laboratory of Nuclear Physics and Ion-beam Application(MOE)and Institute of Modern Physics Fudan UniversityShanghai 200443 II.Physikalisches Institut Georg-August-Universität Göttingen37073 Göttingen Gifu University Gifu 501-1193 the Graduate University for Advanced Studies(SOkENdAI) Hayama 240-0193 Gyeongsang National University Jinju 52828 department of Physics and Institute of Natural Sciences Hanyang UniversitySeoul 04763 High Energy Accelerator Research Organization(kEk) Tsukuba 305-0801 j-PARC Branch KEK Theory CenterHigh Energy Accelerator Research Organization(KEK)Tsukuba 305-0801 Indian Institute of Science Education and Research Mohali SAS Nagar140306 Indian Institute of technology Bhubaneswar Satya Nagar 751007 Indian Institute of technology Hyderabad Telangana 502285 Indian Institute of technology Madras Chennai 600036 Indiana University BloomingtonIndiana 47408 Institute for High Energy Physics Protvino 142281 Institute of High Energy Physics Vienna 1050 Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049 Institute of Particle Physics(Canada) VictoriaBritish Columbia V8W 2Y2 Institute of Physics Hanoi Instituto de fisica Corpuscular Paterna 46980 INfN Laboratori Nazionali di frascati I-00044 Frascati INfN Sezione di Napoli I-80126 Napoli INfN Sezione di Padova I-35131 Padova INfN Sezione di Perugia I-06123 Perugia

from April to july 2018,a data sample at the peak energy of the t(4 S) resonance was collected with the Belle Ⅱ detector at the SuperkEkB electron-positron *** is the first data sample of the Belle Ⅱ *** Bhabha and digamma events,we measure the integrated luminosity of the data sample to be(496.3±0.3±3.0) pb-1,where the first uncertainty is statistical and the second is *** work provides a basis for future luminosity measurements at Belle Ⅱ.

关键词： luminosity Bhabha digamma Belle II

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Methods for a blind analysis of isobar data collected by the StAR collaboration

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Nuclear Science and techniques 2021年第5期32卷 43-50页

作者： j.Adam L.Adamczyk j.R.Adams j.k.Adkins G.Agakishiev M.M.Aggarwal Z.Ahammed I.Alekseev d.M.Anderson A.Aparin E.C.Aschenauer M.U.Ashraf f.G.Atetalla A.Attri G.S.Averichev V.Bairathi k.Barish A.Behera R.Bellwied A.Bhasin j.Bielcik j.Bielcikova L.C.Bland I.G.Bordyuzhin j.d.Brandenburg A.V.Brandin j.Butterworth H.Caines M.Calderon de la Barca Sanchez d.Cebra I.Chakaberia P.Chaloupka B.k.Chan f-H.Chang Z.Chang N.Chankova-Bunzarova A.Chatterjee d.Chen j.Chen j.H.Chen X.Chen Z.Chen j.Cheng M.Cherney M.Chevalier S.Choudhury W.Christie X.Chu H.j.Crawford M.Csanad M.daugherity t.G.dedovich I.M.deppner A.A.derevschikov L.didenko X.dong j.L.drachenberg j.C.dunlop t.Edmonds N.Elsey j.Engelage G.Eppley S.Esumi O.Evdokimov A.Ewigleben O.Eyser R.fatemi S.fazio P.federic j.fedorisin C.j.feng Y.feng P.filip E.finch Y.fisyak A.francisco L.fulek C.A.Gagliardi t.Galatyuk f.Geurts A.Gibson k.Gopal X.Gou d.Grosnick W.Guryn A.I.Hamad A.Hamed S.Harabasz j.W.Harris S.He W.He X.H.He Y.He S.Heppelmann S.Heppelmann N.Herrmann E.Hoffman L.Holub Y.Hong S.Horvat Y.hu H.Z.huang S.L.huang t.huang X.huang t.j.humanic P.huo G.Igo d.Isenhower W.W.jacobs C.jena A.jentsch Y.ji j.jia k.jiang S.jowzaee X.ju E.G.judd S.kabana M.L.kabir S.kagamaster d.kalinkin k.kang d.kapukchyan k.kauder H.W.ke d.keane A.kechechyan M.kelsey Y.V.khyzhniak d.P.kikoła C.kim B.kimelman d.kincses t.A.kinghorn I.kisel A.kiselev M.kocan L.kochenda L.k.kosarzewski L.kramarik P.kravtsov k.krueger N.kulathunga Mudiyanselage L.kumar S.kumar R.kunnawalkam Elayavalli j.H.kwasizur R.Lacey S.Lan j.M.Landgraf j.Lauret A.Lebedev R.Lednicky j.H.Lee Y.H.Leung C.Li C.Li W.Li W.Li X.Li Y.Li Y.Liang R.Licenik t.Lin Y.Lin M.A.Lisa f.Liu H.Liu P.Liu P.Liu t.Liu X.Liu Y.Liu Z.Liu t.Ljubicic W.j.Llope R.S.Longacre N.S.Lukow S.Luo X.Luo G.L.Ma L.Ma R.Ma Y.G.Ma N.Magdy R.Majka d.Mallick S.Margetis C.Markert H.S.Matis j.A.Mazer N.G.Minaev S.Mioduszewski B.Mohanty I.Mooney Z.Moravcova d.A.Morozov M.Nagy j.d.Nam Md.Nasim k.Nayak d.Neff j.M.Nelson d.B.Nemes M.Nie G.Nigmatkulov t.Niida L.V.Nogach t.Nonak Christian University AbileneTX 796992 AGH University of Science and technology FPACSCracow 30-059Poland Alikhanov Institute for theoretical and Experimental Physics NRC"kurchatov Institute" MoscowRussia 117218 Argonne National Laboratory ArgonneIL 60439 American University of Cairo New CairoNew Cairo 11835Egypt Brookhaven National Laboratory UptonNY 11973 University of California BerkeleyCA 94720 University of California DavisCA 95616 University of California Los AngelesCA 90095 University of California RiversideCA 92521 Central China Normal University Wuhan 430079 University of Illinois at Chicago ChicagoIL 60607 Creighton University OmahaNE 68178 Czech technical University in Prague FNSPEPrague 11519Czech Republic technische Universitat darmstadt Darmstadt 64289Germany ELtE Eotvos Lorand University Budapest 1117Hungary frankfurt Institute for Advanced Studies fIAS Frankfurt 60438Germany fudan University Shanghai 200433 University of Heidelberg 69120 HeidelbergGermany University of Houston HoustonTX 77204 huzhou University Huzhou 313000 Indian Institute of Science Education and Research(IISER) Berhampur 760010India Indian Institute of Science Education and Research(IISER)tirupati Tirupati 517507India Indian Institute technology PatnaBihar 801106India Indiana University BloomingtonIN 47408 Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000 University of jammu Jammu 180001India joint Institute for Nuclear Research DubnaRussia 141980 kent State University KentOH 44242 University of kentucky LexingtonKY 40506-0055 Lawrence Berkeley National Laboratory BerkeleyCA 94720 Lehigh University BethlehemPA 18015 Max-Planck-Institut fur Physik 80805 MunichGermany Michigan State University East LansingMI 48824 National Research Nuclear University MEPhI MoscowRussia 115409 National Institute of Science Education and Research HBNIJatni 752050India National Cheng kung University Tainan 70101 Nuclear Physics Institute of the CAS Rez 25068Czech Republic Ohio State University

In 2018,the StAR collaboration collected data from^(96)_(44)Ru+^(96)_(44)Ru and^(96)_(40)Zr+^(96)_(40)Zr at√^(S)NN=200 Ge V to search for the presence of the chiral magnetic effect in collisions of *** isobar collision species alternated frequently between 9644 Ru+^(96)_(44)Ru and^(96)_(40)Zr+^(96)_(40)*** order to conduct blind analyses of studies related to the chiral magnetic effect in these isobar data,StAR developed a three-step blind analysis *** are initially provided a"reference sample"of data,comprised of a mix of events from the two species,the order of which respects time-dependent changes in run *** tuning analysis codes and performing time-dependent quality assurance on the reference sample,analysts are provided a species-blind sample suitable for calculating efficiencies and corrections for individual≈30-min data-taking *** this sample,species-specific information is disguised,but individual output files contain data from a single isobar *** run-by-run corrections and code alteration subsequent to these corrections are allowed at this *** these modifications,the"frozen"code is passed over the fully un-blind data,completing the blind *** a check of the feasibility of the blind analysis procedure,analysts completed a"mock data challenge,"analyzing data from Au+Au collisions at√^(S)NN=27 Ge V,collected in *** Au+Au data were prepared in the same manner intended for the isobar blind *** details of the blind analysis procedure and results from the mock data challenge are presented.

关键词： Blind analysis Chiral magnetic effect Heavy-ion collisions

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Measurement of away-side broadening with self-subtraction of flow in Au+Au collisions at √sNN=200 GeV

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Chinese Physics C 2020年第10期44卷 59-67页

作者： L.Adamczyk j.R.Adams j.k.Adkins G.Agakishiev M.M.Aggarwal Z.Ahammed I.Alekseev d.M.Anderson A.Aparin E.C.Aschenauer M.U.Ashraf f.G.Atetalla A.Attri G.S.Averichev V.Bairathi k.Barish A.Behera R.Bellwied A.Bhasin j.Bielcik j.Bielcikova L.C.Bland I.G.Bordyuzhin j.d.Brandenburg A.V.Brandin j.Butterworth H.Caines M.Calderón de la Barca Sánchez d.Cebra I.Chakaberia P.Chaloupka B.k.Chan f-H.Chang Z.Chang N.Chankova-Bunzarova A.Chatterjee d.Chen j.H.Chen X.Chen Z.Chen j.Cheng M.Cherney M.Chevalier S.Choudhury W.Christie X.Chu H.j.Crawford M.Csanád M.daugherity t.G.dedovich I.M.deppner A.A.derevschikov L.didenko X.dong j.L.drachenberg j.C.dunlop t.Edmonds N.Elsey j.Engelage G.Eppley S.Esumi O.Evdokimov A.Ewigleben O.Eyser R.fatemi S.fazio P.federic j.fedorisin C.j.feng Y.feng P.filip E.finch Y.fisyak A.francisco L.fulek C.A.Gagliardi t.Galatyuk f.Geurts A.Gibson k.Gopal d.Grosnick W.Guryn A.I.Hamad A.Hamed S.Harabasz j.W.Harris S.He W.He X.H.He S.Heppelmann S.Heppelmann N.Herrmann E.Hoffman L.Holub Y.Hong S.Horvat Y.hu H.Z.huang S.L.huang t.huang X.huang t.j.humanic P.huo G.Igo d.Isenhower W.W.jacobs C.jena A.jentsch Y.jI j.jia k.jiang S.jowzaee X.ju E.G.judd S.kabana M.L.kabir S.kagamaster d.kalinkin k.kang d.kapukchyan k.kauder H.W.ke d.keane A.kechechyan M.kelsey Y.V.khyzhniak d.P.kikoła C.kim B.kimelman d.kincses t.A.kinghorn I.kisel A.kiselev M.kocan L.kochenda L.k.kosarzewski L.kramarik P.kravtsov k.krueger N.kulathunga Mudiyanselage L.kumar S.kumar R.kunnawalkam Elayavalli j.H.kwasizur R.Lacey S.Lan j.M.Landgraf j.Lauret A.Lebedev R.Lednicky j.H.Lee Y.H.Leung C.Li W.Li W.Li X.Li Y.Li Y.Liang R.Licenik t.Lin Y.Lin M.A.Lisa f.Liu H.Liu P.Liu P.Liu t.Liu X.Liu Y.Liu Z.Liu t.Ljubicic W.j.Llope R.S.Longacre N.S.Lukow S.Luo X.Luo G.L.Ma L.Ma R.Ma Y.G.Ma N.Magdy R.Majka d.Mallick S.Margetis C.Markert H.S.Matis j.A.Mazer N.G.Minaev S.Mioduszewski B.Mohanty I.Mooney Z.Moravcova d.A.Morozov M.Nagy j.d.Nam Nasim Md k.Nayak d.Neff j.M.Nelson d.B.Nemes M.Nie G.Nigmatkulov t.Niida L.V.Nogach t.Nonaka A.S.Nunes G.Odyniec A.Ogawa Abilene Christian University AbileneTexas 79699 AGH University of Science and technology FPACSCracow 30-059Poland Alikhanov Institute for theoretical and Experimental Physics NRC"kurchatov Institute" Moscow 117218Russia Argonne National Laboratory ArgonneIllinois 60439 American University of Cairo New Cairo 11835New CairoEgypt Brookhaven National Laboratory UptonNew York 11973 University of California BerkeleyCalifornia 94720 University of California DavisCalifornia 95616 University of California Los AngelesCalifornia 90095 University of California RiversideCalifornia 92521 Central China Normal University WuhanHubei 430079 University of Illinois at Chicago ChicagoIllinois 60607 Creighton University OmahaNebraska 68178 Czech technical University in Prague FNSPEPrague 11519Czech Republic technische Universität darmstadt Darmstadt 64289Germany ELtE Eötvös Loránd University BudapestHungary H-1117 frankfurt Institute for Advanced Studies fIAS Frankfurt 60438Germany fudan University Shanghai 200433 University of Heidelberg Heidelberg 69120Germany University of Houston HoustonTexas 77204 huzhou University HuzhouZhejiang 313000 Indian Institute of Science Education and Research(IISER) Berhampur 760010India Indian Institute of Science Education and Research(IISER)tirupati Tirupati 517507India Indian Institute technology PatnaBihar 801106India Indiana University BloomingtonIndiana 47408 Institute of Modern Physics Chinese Academy of SciencesLanzhouGansu 730000 University of jammu Jammu 180001India joint Institute for Nuclear Research Dubna 141980Russia kent State University KentOhio 44242 University of kentucky LexingtonKentucky 40506-0055 Lawrence Berkeley National Laboratory BerkeleyCalifornia 94720 Lehigh University BethlehemPennsylvania 18015 Max-Planck-Institut für Physik Munich 80805Germany Michigan State University East LansingMichigan 48824 National Research Nuclear University MEPhI Moscow 115409Russia National Institute of Science Education and Research HBNIJatni 752050Indi

High transverse momentum(pt)particle production is suppressed owing to the parton(jet)energy loss in the hot dense medium created in relativistic heavy-ion *** of energy at low-to-modest pt has been difficult to measure,owing to large anisotropic *** report a data-driven method for background evaluation and subtraction,exploiting the away-side pseudorapidity gaps,to measure the jetlike correlation shape in Au+Au collisions at √sNN=200 GeV in the StAR *** correlation shapes,for trigger particles pt>3GeV/c and various associated particle pt ranges within 0.5ttent with Gaussians,and their widths increase with *** results indicate jet broadening in the medium created in central heavy-ion collisions.

关键词： di-hadron correlations jet heavy-ion

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Observation of the Y(4230)and a new structure in e^(+)e^(-)→k^(+)k^(-)j/Ψ

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Chinese Physics C 2022年第11期46卷 7-21页

作者： M.Ablikim M.N.Achasov P.Adlarson M.Albrecht R.Aliberti A.Amoroso M.R.An Q.An X.H.Bai Y.Bai O.Bakina R.Baldini ferroli I.Balossino Y.Ban V.Batozskaya d.Becker k.Begzsuren N.Berger M.Bertani d.Bettoni f.Bianchi j.Bloms A.Bortone I.Boyko R.A.Briere A.Brueggemann H.Cai X.Cai A.Calcaterra G.f.Cao N.Cao S.A.Cetin j.f.Chang W.L.Chang G.Chelkov C.Chen G.Chen H.S.Chen M.L.Chen S.j.Chen t.Chen X.R.Chen X.t.Chen Y.B.Chen Z.j.Chen W.S.Cheng X.Chu G.Cibinetto f.Cossio j.j.Cui H.L.dai j.P.dai A.dbeyssi R.Ede Boer d.dedovich Z.Y.deng A.denig I.denysenko M.destefanis f.de Mori Y.ding j.dong L.Y.dong M.Y.dong X.dong S.X.du P.Egorov Y.L.fan j.fang S.S.fang W.X.fang Y.fang R.farinelli L.fava f.feldbauer G.felici C.Q.feng j.H.feng k fischer M.fritsch C.fritzsch C.d.fu H.Gao Y.N.Gao Yang Gao S.Garbolino I.Garzia P.t.Ge C.Geng E.M.Gersabeck A Gilman k.Goetzen L.Gong W.X.Gong W.Gradl M.Greco M.H.Gu C.Y Guan A.Q.Guo L.B.Guo R.P.Guo Y.P.Guo A.Guskov t.t.Han W.Y.Han X.Q.Hao f.A.Harris k.k.He k.L.He f.H.Heinsius C.H.Heinz Y.k.Heng C.Herold M.Himmelreich t.Holtmann G.Y.Hou Y.R.Hou Z.L.Hou H.M.hu j.f.hu t.hu Y.hu G.S.huang k.X.huang L.Q.huang L.Q.huang X.t.huang Y.P.huang Z.huang t.hussain N husken W.Imoehl M.Irshad j.jackson S.jaeger S.janchiv Q.ji Q.P.ji X.B.ji X.L.ji Y.Y.ji Z.k.jia H.B.jiang S.S.jiang X.S.jiang Y.jiang j.B.jiao Z.jiao S.jin Y.jin M.Q.jing t.johansson N.kalantar-Nayestanaki X.S.kang R.kappert M.kavatsyuk B.C.ke I.k.keshk A.khoukaz P.kiese R.kiuchi R.kliemt L.koch O.B.kolcu B.kopf M.kuemmel M.kuessner A.kupsc W.kuhn j.j.Lane j.S.Lange P.Larin A.Lavania L.Lavezzi Z.H.Lei H.Leithoff M.Lellmann t.Lenz C.Li C.Li C.H.Li Cheng Li d.M.Li f.Li G.Li H.Li H.Li H.B.Li H.j.Li H.N.Li j.Q.Li j.S.Li j.W.Li ke Li L.j Li L.k.Li Lei Li M.H.Li P.R.Li S.X.Li S.Y.Li t.Li W.d.Li W.G.Li X.H.Li X.L.Li Xiaoyu Li Z.Y.Li H.Liang H.Liang H.Liang Y.f.Liang Y.t.Liang G.R.Liao L.Z.Liao j.Libby A.Limphirat C.X.Lin d.X.Lin t.Lin B.j.Liu C.X.Liu d.Liu f.H.Liu fang Liu feng Liu G.M.Liu H.Liu H.M.Liu huanhuan Liu huihui Liu j.B.Liu j.L.Liu j.Y.Liu k.Liu k.Y.L Institute of High Energy Physics Beijing 100049China Beihang University Beijing 100191China Beijing Institute of Petrochemical technology Beijing 102617China Bochum Ruhr-University D-44780 BochumGermany Carnegie Mellon University PittsburghPennsylvania 15213USA Central China Normal University Wuhan 430079China China Center of Advanced Science and technology Beijing 100190China COMSAtS University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan fudan University Shanghai 200433China G.I.Budker Institute of Nuclear Physics SB RAS(BINP) Novosibirsk 630090Russia GSI Helmholtzcentre for Heavy Ion Research GmbH D-64291 DarmstadtGermany Guangxi Normal University Guilin 541004China Hangzhou Normal University Hangzhou 310036China Helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany Henan Normal University Xinxiang 453007China Henan University of Science and technology Luoyang 471003China Henan University of technology Zhengzhou 450001China huangshan College Huangshan 245000China hunan Normal University Changsha 410081China hunan University Changsha 410082China Indian Institute of technology Madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA INfN Laboratori Nazionali di frascati INFN Laboratori Nazionali di FrascatiI-00044FrascatiItaly INfN Laboratori Nazionali di frascati INFN Sezione di PerugiaI-06100PerugiaItaly INfN Laboratori Nazionali di frascati University of PerugiaI-06100PerugiaItaly INfN Sezione di ferrara INFN Sezione di FerraraI-44122FerraraItaly INfN Sezione di ferrara University of FerraraI-44122FerraraItaly Institute of Modern Physics Lanzhou 730000China Institute of Physics and technology Peace Ave.54BUlaanbaatar 13330Mongolia jilin University Changchun 130012China johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany joint Institute for Nuclear Research 141980 DubnaMoscow regionRussia justus-Liebig-Universitaet Giessen II.Physikalisches InstitutHeinrich-Buff-Ring 16

the cross sections of e^(+)e^(-)→k^(+)k^(-)j/Ψat center-of-mass energies from 4.127 to 4.600 GeV are measured based on 15.6 fb-1data collected with the BESⅢ detector operating at the BEPCⅡ storage *** resonant structures are observed in the line shape of the cross *** mass and width of the first structure are measured to be(4225.3±2.3±21.5)MeV and(72.9±6.1±30.8)MeV,*** are consistent with those of the established Y(4230).the second structure is observed for the first time with a statistical significance greater than 8σ,denoted as Y(4500).Its mass and width are determined to be(4484.7±13.3±24.1)MeV and(111.1±30.1±15.2)MeV,*** first presented uncertainties are statistical and the second ones are *** product of the electronic partial width with the decay branching fractionΓ(Y(4230)→e^(+)e^(−))B(Y(4230)→k^(+)k^(−)j/Ψ)is reported.

关键词： Y states charmonium-like states BESⅢ

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Luminosities and energies of e^(+)e^(−) collision data taken between √s=4.61 GeV and 4.95 GeV at BESⅢ

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Chinese Physics C 2022年第11期46卷 64-75页

from december 2019 to june 2021,the BESⅢ experiment collected approximately 5.85 fb^(−1) of data at center-of-mass energies between 4.61 and 4.95 *** is the highest collision energy BEPCⅡ has reached to *** accumulated e^(+)e^(−) annihilation data samples are useful for studying charmonium(-like)states and charmed-hadron *** adopting a novel method of analyzing the production of A_(c)^(+)A_(c)^(-) pairs in e^(+)e^(−) annihilation,the center-of-mass energies are measured with a precision of 0.6 *** luminosities are measured with a precision of better than 1% by analyzing the events of large-angle Bhabha *** measurements provide important inputs to analyses based on these data samples.

关键词： luminosity center-of-mass energy BESⅢdetector

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Observations of the Cabibbo-Suppressed decays Λ_(c)^(+)→nπ+π^(0),nπ^(+)π^(-)π^(+) and the Cabibbo-favored decay Λ_(c)^(+)→nk^(-)π^(+)π^(+)

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Chinese Physics C 2023年第2期47卷 1-18页

作者：麦迪娜 M.N.Achasov P.Adlarson M.Albrecht R.Aliberti A.Amoroso 安美儒安琪白羽 O.Bakina R.Baldini ferroli I.Balossino 班勇 V.Batozskaya d.Becker k.Begzsuren N.Berger M.Bertani d.Bettoni f.Bianchi E.Bianco j.Bloms A.Bortone I.Boyko R.A.Briere A.Brueggemann 蔡浩蔡啸 A.Calcaterra 曹国富曹宁 S.A.Cetin 常劲帆常万玲车国荣 G.Chelkov 陈琛陈超陈刚陈和生陈玛丽陈申见陈少敏 t.Chen 陈旭荣 X.t.Chen 陈元柏陈卓俊成伟帅 S.k.Choi 初晓 G.Cibinetto f.Cossio 崔佳佳代洪亮代建平 A.dbeyssi R.Ede Boer d.dedovich 邓子艳 A.denig I.denysenko M.destefanis f.de Mori 丁勇丁逸董静董燎原董明义董翔杜书先段宗欢 P.Egorov 范玉兰方建房双世方文兴方易 R.farinelli L.fava f.feldbauer G.felici 封常青冯俊华 k fischer M.fritsch C.fritzsch 傅成栋高涵高原宁高扬 S.Garbolino I.Garzia 葛潘婷葛振武耿聪 E.M.Gersabeck A Gilman k.Goetzen 龚丽龚文煊 W.Gradl M.Greco 谷立民顾旻皓顾运厅关春懿郭爱强郭立波郭如盼郭玉萍 A.Guskov 韩文颖郝喜庆 f.A.Harris 何凯凯何康林 f.H.Heinsius C.H.Heinz 衡月昆 C.Herold 侯国一侯颖锐侯治龙胡海明 j.f.hu 胡涛胡誉黄光顺黄凯旋黄麟钦黄性涛黄燕萍黄震 t.hussain N Hüsken W.Imoehl M.Irshad j.jackson S.jaeger S.janchiv E.jang j.H.jeong 纪全姬清平季晓斌季筱璐吉钰瑶贾泽坤姜赛赛江晓山 Y.jiang 焦健斌焦铮金山金毅荆茂强 t.johansson N.kalantar-Nayestanaki 康晓珅 R.kappert M.kavatsyuk 柯百谦 I.k.keshk A.khoukaz R.kiuchi R.kliemt L.koch O.B.kolcu B.kopf M.kuemmel M.kuessner A.kupsc W.kühn j.j.Lane j.S.Lange P.Larin A.Lavania L.Lavezzi 雷祚弘 H.Leithoff M.Lellmann t.Lenz 李翠李聪李春花李澄李德民李飞李刚李慧李贺李海波李惠静 H.N.Li j.Q.Li 李静舒李井文李科 L.j Li 李龙科李蕾李明浩李培荣李素娴栗帅迎李腾李卫东李卫国李旭红李晓玲李晓宇李彦谷李振轩李紫源梁畅梁昊梁浩梁浩梁勇飞梁羽铁廖广睿廖龙洲 j.Libby A.Limphirat 林创新林德旭 t.Lin 刘北江刘成刘春秀 d.Liu 刘福虎刘芳刘峰 G.M.Liu H.Liu 刘宏邦刘怀民刘欢欢刘汇慧刘建北刘佳俊刘晶译刘凯刘魁勇刘珂刘亮刘露刘美宏刘佩莲刘倩刘树彬刘桐刘维克刘卫民刘翔刘英刘玉斌刘振安刘智青娄辛丑卢飞翔吕海江吕军光陆小玲卢宇卢云鹏 Z.H.Lu 罗成林罗民兴罗涛罗小兰吕晓睿吕翌丰马凤才马海龙马连良马明明马秋梅马润秋马瑞廷马骁妍马尧 f.E.Maas M.Maggiora S.Maldaner S.Malde Q.A.Malik A.Mangoni 冒亚军毛泽普 S.Marcello 孟召霞 j.G.Messchendorp G.Mezzadri H.Miao 闵天觉 R.E.Mitchell 莫晓虎 N.Yu.Muchnoi Y.Nefedov f.Nerling I.B.Nikolaev 宁哲 S.Nisar 牛艳 S.L.Olsen 欧阳群 S.Pacetti 潘祥潘越 A.Pathak P.Patteri M.Pelizaeus 彭海平 k.Peters 平加伦平荣刚 S.Plura S.Pogodin V.Prasad 齐法制齐航漆红荣祁鸣齐天钰钱森钱文斌钱圳乔从丰秦佳佳秦丽清覃潇平秦小帅秦中华邱进发屈三强 k.H.Rashid C.f Institute of High Energy Physics Beijing 100049China Beihang University Beijing 100191China Beijing Institute of Petrochemical technology Beijing 102617China Bochum Ruhr-University D-44780 BochumGermany Carnegie Mellon University PittsburghPennsylvania 15213USA Central China Normal University Wuhan 430079China Central South University Changsha 410083China China Center of Advanced Science and technology Beijing 100190China COMSAtS University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan fudan University Shanghai 200433China G.I.Budker Institute of Nuclear Physics SB RAS(BINP) Novosibirsk 630090Russia GSI Helmholtzcentre for Heavy Ion Research GmbH D-64291 DarmstadtGermany Guangxi Normal University Guilin 541004China Guangxi University Nanning 530004China Hangzhou Normal University Hangzhou 310036China Hebei University Baoding 071002China Helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany Henan Normal University Xinxiang 453007China Henan University of Science and technology Luoyang 471003China Henan University of technology Zhengzhou 450001China huangshan College Huangshan 245000China hunan Normal University Changsha 410081China hunan University Changsha 410082China Indian Institute of technology Madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA INfN Laboratori Nazionali di frascati I-00044FrascatiItaly INfN Sezione di Perugia I-06100PerugiaItaly University of Perugia I-06100PerugiaItaly INfN Sezione di ferrara I-44122FerraraItaly University of ferrara I-44122FerraraItaly Institute of Modern Physics Lanzhou 730000China Institute of Physics and technology Peace Avenue 54BUlaanbaatar 13330Mongolia jilin University Changchun 130012China johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany joint Institute for Nuclear Research 141980 DubnaMoscow regionRussia justus-Liebig-Universitaet Giessen II.Physikalisches InstitutHeinrich-Buff-Ring 16D-35392 GiessenGermany Lanzhou Un

Using electron-positron annihilation data samples corresponding to an integrated luminosity of 4.5 fb-1,collected by the BESⅢdetector in the energy region between 4599.53 MeV and 4698.82 MeV,we report the first observations of the Cabibbo-suppressed decaysΛ_(c)^(+)→nπ^(+)π^(0),Λ_(c)^(+)→nπ^(+)π^(-)π^(+),and the Cabibbo-favored decayΛ_(c)^(+)→nk^(-)π^(+)π^(+)with statistical significances of 7.9σ,7.8σ,and>10σ,*** branching fractions of these decays are measured to be B(Λ_(c)^(+)→nπ^(+)π^(0))=(0.64±0.09±0.02)%,B(Λ_(c)^(+)→nπ^(+)π^(-)π^(+))=(0.45±0.07±0.03)%,and B(Λ_(c)^(+)→nk^(-)π^(+)π^(+))=(1.90±0.08±0.09)%,where the first uncertainties are statistical and the second are *** find that the branching fraction of the decayΛ_(c)^(+)→nπ^(+)π^(0)is about one order of magnitude higher than that ofΛ_(c)^(+)→nπ^(+).

关键词： ∧_(c)^(+)baryon Branching fraction BESⅢdetector

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Search for hidden-charm tetraquark with strangeness in e^(+)e^(−)→k^(+)d_(s)^(∗−) d^(∗0 )+ c.c.

引用

Chinese Physics C 2023年第3期47卷 1-14页

作者：麦迪娜 M.N.Achasov P.Adlarson M.Albrecht R.Aliberti A.Amoroso 安美儒安琪白羽 O.Bakina R.Baldini ferroli I.Balossino Y.Ban V.Batozskaya d.Becker k.Begzsuren N.Berger M.Bertani d.Bettoni f.Bianchi E.Bianco j.Bloms A.Bortone I.Boyko R.A.Briere A.Brueggemann 蔡浩蔡啸 A.Calcaterra 曹国富曹宁 S.A.Cetin 常劲帆常万玲车国荣 G.Chelkov 陈琛陈超陈刚陈和生陈玛丽陈申见陈少敏 t.Chen 陈旭荣 X.t.Chen 陈元柏陈卓俊成伟帅 S.k.Choi 初晓 G.Cibinetto f.Cossio 崔佳佳代洪亮代建平 A.dbeyssi R.E.de Boer d.dedovich 邓子艳 A.denig I.denysenko M.destefanis f.de Mori 丁勇丁逸董静董燎原董明义董翔杜书先段宗欢 P.Egorov 范玉兰方建房双世方文兴方易 R.farinelli L.fava f.feldbauer G.felici 封常青冯俊华 k fischer M.fritsch C.fritzsch 傅成栋高涵高原宁高扬 S.Garbolino I.Garzia 葛潘婷葛振武耿聪 E.M.Gersabeck A Gilman k.Goetzen 龚丽龚文煊 W.Gradl M.Greco 谷立民顾旻皓顾运厅关春懿郭爱强郭立波郭如盼郭玉萍 A.Guskov 韩文颖郝喜庆 f.A.Harris 何凯凯何康林 f.H.Heinsius C.H.Heinz 衡月昆 C.Herold 侯国一侯颖锐侯治龙胡海明 j.f.hu 胡涛胡誉黄光顺黄凯旋黄麟钦黄性涛黄燕萍黄震 t.hussain N Hüsken W.Imoehl M.Irshad j.jackson S.jaeger S.janchiv E.jang j.H.jeong 纪全姬清平季晓斌季筱璐吉钰瑶贾泽坤蒋沛成姜赛赛江晓山 Y.jiang 焦健斌焦铮金山金毅荆茂强 t.johansson S.kabana N.kalantar-Nayestanaki 康晓琳康晓珅 R.kappert M.kavatsyuk 柯百谦 I.k.keshk A.khoukaz R.kiuchi R.kliemt L.koch O.B.kolcu B.kopf M.kuemmel M.kuessner A.kupsc W.kühn j.j.Lane j.S.Lange P.Larin A.Lavania L.Lavezzi 雷天天雷祚弘 H.Leithoff M.Lellmann t.Lenz 李聪李翠李春花李澄李德民李飞李刚李慧李贺李海波李惠静 H.N.Li j.Q.Li 李静舒李井文李科 L.j Li 李龙科李蕾李明浩李培荣李素娴栗帅迎李腾李卫东李卫国李旭红李晓玲李晓宇李彦谷李振轩李紫源梁畅梁浩梁昊梁勇飞梁羽铁廖广睿廖龙洲 j.Libby A.Limphirat 林创新林德旭 t.Lin 刘北江刘成刘春秀 d.Liu 刘福虎刘芳刘峰 G.M.Liu H.Liu 刘宏邦刘怀民刘欢欢刘汇慧刘建北刘佳俊刘晶译刘凯刘魁勇刘珂刘亮刘露刘美宏刘佩莲刘倩刘树彬刘桐刘维克刘卫民刘翔刘英刘玉斌刘振安刘智青娄辛丑卢飞翔吕海江吕军光陆小玲卢宇卢云鹏卢泽辉罗成林罗民兴罗涛罗小兰吕晓睿吕翌丰马凤才马海龙马连良马明明马秋梅马润秋马瑞廷马骁妍马尧 f.E.Maas M.Maggiora S.Maldaner S.Malde Q.A.Malik A.Mangoni 冒亚军毛泽普 S.Marcello 孟召霞 j.G.Messchendorp G.Mezzadri H.Miao 闵天觉 R.E.Mitchell 莫晓虎 N.Yu.Muchnoi Y.Nefedov f.Nerling I.B.Nikolaev 宁哲 S.Nisar 牛艳 S.L.Olsen 欧阳群 S.Pacetti 潘祥潘越 A.Pathak 裴宇鹏 M.Pelizaeus 彭海平 k.Peters 平加伦平荣刚 S.Plura S.Pogodin V.Prasad 齐法制齐航漆红荣祁鸣齐天钰钱森钱文斌钱圳乔从丰秦佳佳秦丽清覃潇平秦小帅秦中华邱进发屈三强 k Institute of High Energy Physics Beijing 100049China Beihang University Beijing 100191China Beijing Institute of Petrochemicaltechnology Beijing 102617China Bochum Ruhr-University D-44780 BochumGermany Carnegie Mellon University PittsburghPennsylvania15213USA Central China Normal University Wuhan 430079China Central South University Changsha 410083China China Center of AdvancedScience and technology Beijing 100190China China University of Geosciences Wuhan 430074China COMSAtS University Islamabad LahoreCampusDefence RoadOff Raiwind Road54000 LahorePakistan fudan University Shanghai 200433China G.I.Budker Institute of NuclearPhysics SB RAS(BINP) Novosibirsk 630090Russia GSI Helmholtzcentre for Heavy Ion Research GmbH D-64291 DarmstadtGermany GuangxiNormal University Guilin 541004China Guangxi University Nanning 530004China Hangzhou Normal University Hangzhou 310036China Hebei University Baoding 071002China Helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany Henan NormalUniversity Xinxiang 453007China Henan University of Science and technology Luoyang 471003China Henan University of technology Zhengzhou 450001China huangshan College Huangshan 245000China hunan Normal University Changsha 410081China hunan University Changsha 410082China Indian Institute of technology Madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA INfN Laboratori Nazionali di frascati INFN Laboratori Nazionali di FrascatiI-00044FrascatiItaly INfN Laboratori Nazionali di frascati INFN Sezione di PerugiaI-06100PerugiaItaly INfN Laboratori Nazionali di frascati University of PerugiaI-06100PerugiaItaly INfN Sezione di ferrara INFN Sezione di FerraraI-44122FerraraItaly INfN Sezione di ferrara University of FerraraI-44122FerraraItaly Institute of Modern Physics Lanzhou 730000People's Republic of China Institute of Physics and technology Peace Avenue 54BUlaanbaatar 13330Mongolia Instituto de Alta Investigación Universidad de TarapacáCasilla 7DAricaChile jilin Univers

We report a search for a heavier partner of the recently observed Z_(cs)(3985)^(-) state,denoted as Z_(cs)^('-),in the process e^(+)e^(−)→k^(+)d_(s)^(∗−) d^(∗0 )+ c.c.,based on e^(*)e^(-)collision data collected at the center-of-mass energies of √s=4.661,4.682 and 4.699 GeV with the BESIII *** Z_(cs)^('-) is of interest as it is expected to be a candidate for a hidden-charm and open-strange tetraquark.A partial-reconstruction technique is used to isolate k^(+)recoil-mass spectra,which are probed for a potential contribution from Z_(cs)^('-)→d_(s)^(∗−) d^(∗0 )+ *** find an excess of Z_(cs)^('-)→d_(s)^(*-)-d^(*0)(c.c.)candidates with a significance of 2.1o,after considering systematic uncertainties,at a mass of(4123.5±0.7_(sat)±4.7_(syst.))MeV/c^(2).As the data set is limited in size,the upper limits are evaluated at the 90%confidence level on the product of the Born cross sections(σ^(Borm))and the branching fraction(B)of Z_(cs)^('-)→d_(s)^(*-)-d^(*0),under different assumptions of the Z_(cs)^('-) mass from 4.120 to 4.140 MeV and of the width from 10 to 50 MeV at the three center-of-mass *** upper limits of σ^(Born).B are found to be at the level of O(1)pb at each *** data samples are needed to confirm the Z_(cs)^('-) state and clarify its nature in the coming years.

关键词： electron-positron collision BESIl hadron spectroscopy tetraquark

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