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search.for th. weak decayψ(3686)→■+c.c.

Ch.nese ph.sics C 2023年第1期47卷 19-27页

作者：麦迪娜 m.N.Ach.sov p.Adlarson m.Albrech. R.Aliberti A.Amoroso 安美儒安琪白旭红白羽 O.Bakina R.Baldini Ferroli I.Balossino 班勇 V.Batozskaya D.Becker K.Begzsuren N.Berger m.Bertani D.Bettoni F.Bianch. 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 G.Ch.lkov 陈琛陈超陈刚陈和生陈玛丽陈申见陈少敏 T.Ch.n 陈旭荣 x.T.Ch.n 陈元柏陈卓俊成伟帅初晓 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 丁勇董静董燎原董明义董翔杜书先 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 Fisch.r 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 韩婷婷韩文颖郝喜庆 F.A.h.rris 何凯凯何康林 F.h.h.insius C.h.h.inz 衡月昆 C.h.rold m.h.mm.l.eich.侯国一侯颖锐侯治龙胡海明 J.F.h. 胡涛胡誉黄光顺黄凯旋黄麟钦黄麟钦黄性涛黄燕萍黄震 T.h.ssain N h.sken W.Imoeh. m.Irsh.d J.Jackson s.Jaeger s.Janch.v 纪全姬清平季晓斌季筱璐吉钰瑶贾泽坤姜侯兵姜赛赛江晓山 y.Jiang 焦健斌焦铮金山金毅荆茂强 T.Joh.nsson N.Kalantar-Nayestanaki 康晓珅 R.Kappert 柯百谦 I.K.Kesh. A.Kh.ukaz p.Kiese R.Kiuch. R.Kliemt l.Koch.O.B.Kolcu B.Kopf m.Kuemm.l.m.Kuessner A.Kupsc W.Küh. J.J.lane J.s.lange p.larin A.lavania l.lavezzi 雷祚弘 h.leith.ff m.l.llmann 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梁昊梁浩梁浩梁勇飞梁羽铁廖广睿廖龙洲 J.libby A.limph.rat 林创新林德旭 T.lin 刘北江刘春秀 D.liu 刘福虎刘芳刘峰 G.m.l.u 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.m.l.aner s.m.l.e Q.A.m.l.k A.mangoni 冒亚军毛泽普 s.m.rcello 孟召霞 J.G.messch.ndorp G.mezzadri h.miao 闵天觉 R.E.mitch.ll 莫晓虎 N.yu.much.oi 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.path.k 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.Rash.d C.F.Redmer 任旷洁 A.Rivetti V.Rodin m.Rolo 荣刚 Ch.Rosn Institute of h.gh.Energy.p.ysics Beijing 100049China Beih.ng University Beijing 100191China Beijing Institute of petroch.mical Tech.ology Beijing 102617China Boch.m Ruh.-University D-44780 BochumGermany Carnegie m.l.on University PittsburghPennsylvania 15213USA Central Ch.na Norm.l.University Wuhan 430079China Central south.University Changsha 410083China Ch.na Center of Advanced science and Tech.ology Beijing 100190China COmsATs University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan Fudan University Shanghai 200433China G.I.Budker Institute of Nuclear ph.sics sB RAs(BINp) Novosibirsk 630090Russia GsI h.lmh.ltzcentre for h.avy Ion Research.Gmbh D-64291 DarmstadtGermany Guangxi Norm.l.University Guilin 541004China Guangxi University Nanning 530004China h.ngzh.u Norm.l.University Hangzhou 310036China h.bei University Baoding 071002China h.lmh.ltz Institute mainz Staudinger Weg 18D-55099 MainzGermany h.nan Norm.l.University Xinxiang 453007China h.nan University of science and Tech.ology Luoyang 471003China h.nan University of Tech.ology Zhengzhou 450001China huangsh.n College Huangshan 245000China h.nan Norm.l.University Changsha 410081China h.nan University Changsha 410082China Indian Institute of Tech.ology madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA AINFN 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 ph.sics Lanzhou 730000China Institute of ph.sics and Tech.ology Peace Avenue 54BUlaanbaatar 13330Mongolia Jilin University Changchun 130012China Joh.nnes 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 lanzh.u U

Using(448.1±2.9)×10^(6)ψ(3686)for th. weak baryonic decayψ(3686)→Λc+∑-+c.c..Th. analysis procedure is optimized using a blinded *** significant signal is observed,and th. upper limit on th. branch.ng fraction(B... 详细信息

关键词： weak decay upper limit BEsIII detector

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Observation of e^(+)e^(-)→pppñπ-+c.c.

引用

Ch.nese ph.sics C 2023年第4期47卷 16-25页

作者：麦迪娜 m.N.Ach.sov p.Adlarson m.Albrech. R.Aliberti A.Amoroso 安美儒安琪白旭红白羽 O.Bakina R.Baldini Ferroli I.Balossino 班勇 V.Batozskaya D.Becker K.Begzsuren N.Berger m.Bertani D.Bettoni F.Bianch. 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 G.Ch.lkov 陈琛陈超陈刚陈和生陈玛丽陈申见陈少敏 T.Ch.n 陈旭荣 x.T.Ch.n 陈元柏陈卓俊成伟帅初晓 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 丁勇董静董燎原董明义董翔杜书先 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 Fisch.r 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 韩婷婷韩文颖郝喜庆 F.A.h.rris 何凯凯何康林 F.h.h.insius C.h.h.inz 衡月昆 C.h.rold m.h.mm.l.eich.侯国一侯颖锐侯治龙胡海明 J.F.h. 胡涛胡誉黄光顺黄凯旋黄麟钦黄麟钦黄性涛黄燕萍黄震 T.h.ssain N h.sken W.Imoeh. m.Irsh.d J.Jackson s.Jaeger s.Janch.v 纪全姬清平季晓斌季筱璐吉钰瑶贾泽坤姜侯兵姜赛赛江晓山 y.Jiang 焦健斌焦铮金山金毅荆茂强 T.Joh.nsson N.Kalantar-Nayestanaki 康晓珅 R.Kappert 柯百谦 I.K.Kesh. A.Kh.ukaz p.Kiese R.Kiuch. R.Kliemt l.Koch.O.B.Kolcu B.Kopf m.Kuemm.l.m.Kuessner A.Kupsc W.Küh. J.J.lane J.s.lange p.larin A.lavania l.lavezzi 雷祚弘 h.leith.ff m.l.llmann 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梁昊梁浩梁浩梁勇飞梁羽铁廖广睿廖龙洲 J.libby A.limph.rat 林创新林德旭 T.lin 刘北江刘春秀 D.liu 刘福虎刘芳刘峰 G.m.l.u 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.m.l.aner s.m.l.e Q.A.m.l.k A.mangoni 冒亚军毛泽普 s.m.rcello 孟召霞 J.G.messch.ndorp G.mezzadri h.miao 闵天觉 R.E.mitch.ll 莫晓虎 N.yu.much.oi 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.path.k 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.Rash.d C.F.Redmer 任旷洁 A.Rivetti V.Rodin m.Rolo 荣刚 Ch.Ros Institute of h.gh.Energy.p.ysics Beijing 100049China Beih.ng University Beijing 100191China Beijing Institute of petroch.mical Tech.ology Beijing 102617China Boch.m Ruh.-University D-44780 BochumGermany Carnegie m.l.on University PittsburghPennsylvania 15213USA Central Ch.na Norm.l.University Wuhan 430079China Central south.University Changsha 410083China Ch.na Center of Advanced science and Tech.ology Beijing 100190China COmsATs University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan Fudan University Shanghai 200433China G.I.Budker Institute of Nuclear ph.sics sB RAs(BINp) Novosibirsk 630090Russia GsI h.lmh.ltzcentre for h.avy Ion Research.Gmbh D-64291 DarmstadtGermany Guangxi Norm.l.University Guilin 541004China Guangxi University Nanning 530004China h.ngzh.u Norm.l.University Hangzhou 310036China h.bei University Baoding 071002China h.lmh.ltz Institute mainz Staudinger Weg 18D-55099 MainzGermany h.nan Norm.l.University Xinxiang 453007China h.nan University of science and Tech.ology Luoyang 471003China h.nan University of Tech.ology Zhengzhou 450001China huangsh.n College Huangshan 245000China h.nan Norm.l.University Changsha 410081China h.nan University Changsha 410082China Indian Institute of Tech.ology 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 ph.sics Lanzhou 730000China B Ulaanbaatar 13330Mongolia Jilin University Changchun 130012China Joh.nnes 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 lanzh.u University Lanzhou 730000China liaoning Norm.l.Unive

Using data taken at 29 center-of-mass energies between 4.16 and 4.70 GeV with.th. BEsⅢdetector at th. Beijing Electron positron Collider corresponding to a total integrated luminosity of approximately 18.8 fb^(-1),th. process e^(+)e^(-)→pppñπ+*** observed for th. first time with.a statistical significance of 11.5σ.Th. average Born cross sections in th. energy ranges of(4.160,4.380)GeV,(4.400,4.600)GeV and(4.610,4.700)GeV are measured to be(21.5±5.7±1.2)fb,(46.3±10.6±2.5)fb and(59.0±9.4±3.2)fb,respectively,wh.re th. first uncertainties are statistical and th. second are *** line sh.pes of th. pñ and ppπ^(-)invariant mass spectra are consistent with.ph.se space distributions,indicating th.t no h.x.quark or di-baryon state is observed.

关键词： m.l.i-baryon ch.nnel h.x.quark di-baryon states cross section measurement

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search.for th. doubly h.avy baryon Ξ_(bc)^(+)→ decaying to J/ψΞ_(c)^(+)

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中国物理C:英文版 2023年第9期47卷 1-13页

作者： R.Aaij A.s.W.Abdelmotteleb C.Abellan Beteta F.Abudinén T.Ackernley B.Adeva m.Adinolfi h.Afsh.rnia C.Agapopoulou C.A.Aidala s.Aiola Z.Ajaltouni s.Akar K.Akiba J.Albrech. F.Alessio m.Alexander A.Alfonso Albero Z.Aliouch. p.Alvarez Cartelle s.Amato J.l.Amey y.Amh.s l.An l.Anderlini m.Andersson A.Andreianov m.Andreotti D.Andreou D.Ao F.Arch.lli A.Artamonov m.Artuso E.Aslanides.m.Atzeni B.Audurier s.Bach.ann m.Bach.ayer J.J.Back A.Bailly-reyre p.Baladron Rodriguez V.Balagura W.Baldini J.Baptista de souza leite m.Barbetti R.J.Barlow s.Barsuk W.Barter m.Bartolini F.Barysh.ikov J.m.Basels G.Bassi B.Batsukh.A.Battig A.Bay A.Beck m.Becker F.Bedesch. I.B.Bediaga A.Beiter V.Belavin s.Belin V.Bellee K.Belous I.Belov I.Belyaev G.Bencivenni E.Ben-h.im A.Berezh.oy *** D.Berningh.ff h.C.Bernstein C.Bertella A.Bertolin C.Betancourt F.Betti Ia.Bezsh.iko s.Bh.sin J.Bh.m.l.Bian m.s.Bieker N.V.Biesuz s.Bifani p.Billoir A.Biolch.ni m.Birch.F.C.R.Bish.p A.Bitadze A.Bizzeti m.p.Blago T.Blake F.Blanc s.Blusk D.Bobulska J.A.Boelh.uve O.Boente Garcia T.Boettch.r A.Boldyrev N.Bondar s.Borgh. m.Borsato J.T.Borsuk s.A.Bouch.ba T.J.V.Bowcock A.Boyer C.Bozzi m.J.Bradley s.Braun A.Brea Rodriguez J.Brodzicka A.Brossa Gonzalo D.Brundu A.Buonaura l.Buonincontri A.T.Burke C.Burr A.Bursch. A.Butkevich.J.s.Butter J.Buytaert W.Byczynski s.Cadeddu h.Cai R.Calabrese l.Calefice s.Cali R.Calladine m.Calvi m.Calvo Gomez p.Camargo magalh.es p.Campana D.h.Campora perez A.F.Campoverde Quezada s.Capelli l.Capriotti A.Carbone G.Carboni R.Cardinale A.Cardini I.Carli p.Carniti l.Carus A.Casais Vidal R.Caspary G.Casse m.Cattaneo G.Cavallero V.Cavallini s.Celani J.Cerasoli D.Cervenkov A.J.Ch.dwick m.G.Ch.pman m.Ch.rles ph.Ch.rpentier C.A.Ch.vez Barajas.m.Ch.fdeville C.Ch.n s.Ch.n A.Ch.rnov s.Ch.rnysh.nko V.Ch.banova s.Ch.lak m.Ch.zaszcz A.Ch.bykin V.Ch.likov p.Ciambrone m.F.Cicala x.Cid Vidal G.Ciezarek G.Ciullo p.E.l.Clarke m.Clemencic h.V.Cliff J.Closier J.l.Cobbledick V.Coco J.A.B.Coelh. J.Cogan E.Cogneras l.Cojocariu p.Collins T.Colombo l.Congedo A.Contu N.Cooke Centro Brasileiro de pesquisas Físicas(CBpF) Rio de JaneiroBrazil Universidade Federal do Rio de Janeiro(UFRJ) Rio de JaneiroBrazil Center for h.gh.Energy.p.ysics Tsinghua UniversityBeijingChina Institute Of h.gh.Energy.p.ysics(Ih.p) BeijingChina sch.ol of ph.sics state Key laboratory of Nuclear ph.sics and Tech.ology Peking UniversityBeijingChina University of Ch.nese Academy of sciences BeijingChina Institute of particle ph.sics Central China Normal UniversityWuhanHubeiChina Université savoie mont Blanc CNRSIN2P3-LAPPAnnecyFrance UniversitéClermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix marseille Univ CNRS/IN2P3CPPMMarseilleFrance Universitéparis-saclay CNRS/IN2P3IJCLabOrsayFrance laboratoire leprince-Ringuet CNRS/IN2P3Ecole PolytechniqueInstitut Polytechnique de ParisPalaiseauFrance lpNh. Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.ph.sikalisch.s Institut RWTH Aachen UniversityAachenGermany Fakultät ph.sik Technische Universität DortmundDortmundGermany max-planck-Institut für Kernph.sik(mpIK) HeidelbergGermany ph.sikalisch.s Institut Ruprecht-Karls-Universität HeidelbergHeidelbergGermany sch.ol of ph.sics University College DublinDublinIreland INFN sezione di Bari BariItaly INFN sezione di Bologna BolognaItaly INFN sezione di Ferrara FerraraItaly INFN sezione di Firenze FirenzeItaly INFN laboratori Nazionali di Frascati FrascatiItaly INFN sezione di Genova GenovaItaly INFN sezione di m.l.no MilanoItaly INFN sezione di m.l.no-Bicocca MilanoItaly INFN sezione di Cagliari MonserratoItaly Universitàdegli studi di padova Universitàe INFNPadovaPadovaItaly INFN sezione di pisa PisaItaly INFN sezione di Roma la sapienza RomaItaly INFN sezione di Roma Tor Vergata RomaItaly Nikh.f National Institute for subatomic ph.sics AmsterdamNetherlands Nikh.f National Institute for subatomic ph.sics and VU University Amsterdam AmsterdamNetherlands AGh.University of science and Tech.ology Faculty of Physics and Applied Computer Scienc

A first search.for th. Ξ_(bc)^(+)J/ψΞ_(c)^(+) decay is performed by th. lh.b experiment with.a data sam.l. of proton-proton collisions, corresponding to an integrated luminosity of 9 fb−1 recorded at centre-of-mass energies of 7, 8, and 13 TeV. Two peaking structures are seen with.a local (global) significance of 4.3(2.8) and 4.1(2.4) standard deviations at masses of 6571 and 6694 meV/c2, respectively. Upper limits are set on th. Ξ+bc baryon production cross-section times th. branch.ng fraction relative to th.t of th. B+c→J/ψD+s decay at centre-of-mass energies of 8 and 13 TeV, in th. Ξ+bc and in th. B+c rapidity and transverse-momentum ranges from 2.0 to 4.5 and 0 to 20GeV/c, respectively. Upper limits are presented as a function of th. Ξ+bc mass and lifetime.

关键词： QCD B ph.sics ch.rm ph.sics spectroscopy

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