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

chinese physics c 2023年第1期47卷 19-27页

作者：麦迪娜 m.N.Achasov p.Adlarson m.Albrecht 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.Bianchi 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.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 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 韩婷婷韩文颖郝喜庆 F.A.Harris 何凯凯何康林 F.H.Heinsius c.H.Heinz 衡月昆 c.Herold m.Himmelreich 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麟钦黄性涛黄燕萍黄震 T.Hussain N Hüsken W.Imoehl m.Irshad j.jackson s.jaeger s.janchiv 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.johansson N.Kalantar-Nayestanaki 康晓珅 R.Kappert 柯百谦 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.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 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.Redmer 任旷洁 A.Rivetti V.Rodin m.Rolo 荣刚 ch.Rosn 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 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 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 U

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

关键词： weak decay upper limit BEsIII detector

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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 0.5pTc,are consistent 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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mDGA2 constrains Glutamatergic Inputs selectively onto cA1 pyramidal Neurons to Optimize Neural circuits for plasticity,memory,and social Behavior

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Neuroscience Bulletin 2024年第7期40卷 887-904页

作者： xuehui Wang donghui Lin jie jiang yuhua Liu xinyan dong jianchen Fan Lifen Gong Weida shen Linghui zeng Tonghui xu Kewen jiang steven A.connor yicheng xie school of Life sciences Nanchang UniversityNanchang330031China Department of Neurology Children's HospitalZhejiang University School of MedicineNational Clinical Research Center for Child HealthHangzhou 310052China Department of Biology York University4700 Keele StreetTorontoON M3J 1P3Canada Key Laboratory of Novel Targets and Drug study for Neural Repair of Zhejiang province School of MedicineHangzhou City UniversityHangzhou 310015China

synapse organizers are essential for the development,transmission,and plasticity of *** as rare synapse suppressors,the mAm domain containing glycosylphosphatidylinositol anchor(mDGA)proteins contributes to synapse organization by inhibiting the formation of the synaptogenic neuroligin-neurexin complex.A previous analysis of mDGA2 mice lacking a single copy of mdga2 revealed upregulated glutamatergic synapses and behaviors consistent with ***,mDGA2 is expressed in diverse cell types and is localized to both excitatory and inhibitory *** the network versus cell-specific effects of mDGA2 loss-of-function requires a cell-type and brain region-selective *** address this,we generated mice harboring a conditional knockout of mdga2 restricted to cA1 pyramidal *** we report that mDGA2 suppresses the density and function of excitatory synapses selectively on pyramidal neurons in the mature *** deletion of mdga2 in cA1 pyramidal neurons of adult mice upregulated miniature and spontaneous excitatory postsynaptic potentials,vesicular glutamate transporter 1 intensity,and neuronal *** effects were limited to glutamatergic synapses as no changes were detected in miniature and spontaneous inhibitory postsynaptic potential properties or vesicular GABA transporter ***,evoked basal synaptic transmission and AmpAR receptor currents were enhanced at glutamatergic *** a behavioral level,memory appeared to be compromised in mdga2 cKO mice as both novel object recognition and contextual fear conditioning performance were impaired,consistent with deficits in long-term potentiation in the cA3-cA1 *** affiliation,a behavioral analog of social deficits in autism,was similarly *** results demonstrate that mDGA2 confines the properties of excitatory synapses to cA1 neurons in mature hippocampal circuits,thereby optimizing this network for plasticity,c

关键词： mDGA2 cA1 pyramidal neurons Glutamatergic inputs synaptic plasticity memory social behaviors Autism synapse organizers

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Optimization of performance of the Km2A full array using the crab Nebula

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chinese physics c 2024年第6期48卷 169-178页

作者：曹臻 F.Aharonian 安琪阿西克古白云翔包逸炜 D.Bastieri 毕效军毕玉江蔡金庭曹晴曹文羽曹喆常进常劲帆陈尚明陈恩生陈亮陈林陈龙陈明君陈玛丽陈起辉陈素弘陈天禄陈阳程宁程耀东崔明阳崔树旺崔晓红崔昱东戴本忠代洪亮戴子高单增罗布 D.della Volpe 董绪强段凯凯樊军辉范一中方军方堃冯存峰封莉冯少辉丰晓婷冯有亮 s.Gabici 高博高川东高林青高启高卫高伟康葛茂茂耿利斯 G.Giacinti 龚光华苟全补顾旻皓郭福来郭晓磊郭义庆郭莹莹韩毅昂何会海贺昊宁何佳银何新波何钰 m.Heller 贺远强侯博文侯超侯贤胡红波胡铨胡世聪黄代绘黄天奇黄文俊黄性涛黄晓渊黄勇黄志成季筱璐贾焕玉贾康江琨姜晓巍姜泽军金敏康明铭柯通 D.Kuleshov.K.Kurinov 李兵兵李澄李骢李丹李飞李海波李会财李华阳李军李剑李捷李凯李文龙李文莲李秀荣李昕李一卓李哲黎卓梁恩维梁云峰林苏杰刘冰刘成刘栋刘虎刘海东刘佳刘江来刘金艳刘茂元柳若愚刘四明刘伟刘怡刘以农鲁睿罗晴吕洪魁马伯强马玲玲马欣华毛基荣闵振 W.mitthumsiri 穆慧君南云程 A.Neronov 区子维庞彬宇 p.pattarakijwanich 裴致远齐孟尧祁业情乔冰强秦家军 D.Ruffolo A.sáiz D.semikoz 邵澄宇邵琅 O.shchegolev 盛祥东舒富文宋慧超 yu.V.stenkin V.stepanov 苏扬孙秦宁孙晓娜孙志斌谭柏轩唐庆文唐泽波田文武王超王昌贝王广威王洪光王惠惠王建成汪凯王利苹王玲玉王培汉王冉王为王祥高王祥玉王阳王玉东王岩谨王忠海王仲翔王振王铮韦大明魏俊杰魏永健文韬吴超勇吴含荣武莎吴雪峰吴雨生席邵强夏捷夏君集项光漫肖迪泫肖刚辛广广辛玉良邢祎熊峥徐东莲徐仁峰徐仁新徐伟立薛良闫大海颜景志颜田杨朝文杨帆杨冯帆杨何文杨佳盈杨莉莉杨明洁杨睿智杨深邦姚玉华姚志国叶一锰尹丽巧尹娜游晓浩游智勇于艳红袁强岳华曾厚敦曾婷轩曾玮查敏张彬彬张丰张海明张恒英张建立张丽霞张力张鹏飞张佩佩张瑞张少博张少如张寿山张潇张笑鹏张云峰张毅张勇赵兵赵静赵雷赵立志赵世平郑福周斌周浩周佳能周猛周平周荣周勋秀祝成光祝凤荣朱辉朱科军左雄 LHAAsO collaboration Key Laboratory of particle Astrophyics&Experimental physics Division&computing center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of chinese Academy of sciences Beijing 100049China Tianfu cosmic Ray Research center Chengdu 610000China Dublin Institute for Advanced studies 31 Fitzwilliam Place2 DublinIreland max-planck-Institut for Nuclear physics P.O.Box 10398069029 HeidelbergGermany state Key Laboratory of particle Detection and Electronics China University of science and Technology of china Hefei 230026China school of physical science and Technology&school of Information science and Technology Southwest Jiaotong UniversityChengdu 610031China school of Astronomy and space science Nanjing UniversityNanjing 210023China center for Astrophysics Guangzhou UniversityGuangzhou 510006China Hebei Normal University Shijiazhuang 050024China Key Laboratory of Dark matter and space Astronomy&Key Laboratory of Radio Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023China Tsung-Dao Lee Institute&school of physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China Key Laboratory for Research in Galaxies and cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China Key Laboratory of cosmic Rays(Tibet University) Ministry of EducationLhasa 850000TibetChina National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China school of physics and Astronomy(Zhuhai)&school of physics(Guangzhou)&sino-French Institute of Nuclear Engineering and Technology(Zhuhai) Sun Yat-sen UniversityZhuhai 519000&Guangzhou 510275China school of physics and Astronomy Yunnan UniversityKunming 650091China Département de physique Nucléaire et corpusculaire Facultéde SciencesUniversitéde Genève24 Quai Ernest Ansermet1211 GenevaSwitzerland Institute of Frontier and Interdisciplinary science Shandong UniversityQingdao 266237China Apc Universit'e Paris Cit'eCNRS/IN2P3CEA/IRFUObservat

The full array of the Large High Altitude Air shower Observatory(LHAAsO)has been in operation since july *** its kilometer-square array(Km2A),we optimized the selection criteria for very high and ultrahigh energyγ-rays using data collected from August 2021 to August 2022,resulting in an improvement in significance of the detection in the crab Nebula of approximately 15%,compared with that of previous *** the implementation of these new selection criteria,the angular resolution was also significantly improved by approximately 10%at tens of *** aspects of the full Km2A array performance,such as the pointing error,were also calibrated using the crab *** resulting energy spectrum of the crab Nebula in the energy range of 10-1000 TeV are well fitted by a log-parabola model,which is consistent with the previous results from LHAAsO and other experiments.

关键词： γ-ray crab Nebula significance

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search for the rare decay B^(0)→j/ψФ

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chinese physics c 2021年第4期45卷 47-60页

作者： R.Aaij c.Abellin Beteta T.Ackernley B.Adeva m.Adinolfi H.Afsharnial c.A.Aidala s.Aiola Z.Ajaltouni s.Akar j.Albrecht F.Alessio m.Alexander A.Alfonso Albero Z.Aliouche G.Alkhazov p.Alvarez cartelle s.Amato y.Amhis L.An L.Anderlini A.Andreianov m.Andreotti F.Archilli A.Artamonov m.Artuso K.Arzymatov E.Aslanides m.Atzeni B.Audurier s.Bachmann m.Bachmaver j.j.Back s.Baker p.Baladron Rodriguez V.Balagura W.Baldinit j.Baptista Leite R.j.Barlow s.Barsuk W.Barter m.Bartolini F.Baryshnikov j.m.Basels G.Bassi B.Batsukh A.Battig A.Bay m.Becker F.Bedeschis I.Bediaga A.Beiter V.Belavin s.Belin V.Bellee K.Belous I.Belov I.Belyaev G.Bencivenni E.Ben-Haim A.Berezhnoy *** D.Berninghoff H.c.Bernstein c.Bertella E.Bertholet A.Bertolin c.Betancourt F.Betti m.O.Bettler Ia.Bezshyiko s.Bhasin j.Bhom L.Bian m.s.Bieker s.Bifani p.Billoir m.Birch F.c.R.Bishop A.Bizzeti m.Biorn m.p.Blago T.Blake F.Blanc s.Blusk D.Bobulska j.A.Boelhauve O.Boente Garcia T.Boettcher A.Boldyrev A.Bondar N.Bondar s.Borghi m.Borisyak m.Borsato j.T.Borsuk s.A.Bouchiba T.j.V.Bowcock A.Boyer c.Bozzi m.j.Bradley s.Braun A.Brea Rodriguezs m.Brodski j.Brodzicka A.Brossa Gonzalo D.Brundu A.Buonaura c.Burr A.Burschee A.Butkevich j.s.Butter j.Buytaert W.Byczynski s.cadeddu H.cai R.calabrese L.calefice L.calero Diaz s.cali R.calladine m.calvi m.calvo Gomez p.camargo magalhaes A.camboni p.campana D.H.campora perez A.F.campoverde Quezada s.capelli L.capriotti A.carbonel G.carboni R.cardinale A.cardini I.carli p.carniti L.carus K.carvalho Akiba A.casais Vidal G.casse m.cattaneo G.cavallero s.celani j.cerasoli A.j.chadwick m.G.chapman m.charles ph.charpentier G.chatzikonstantinidis c.A.chavez Barajas m.chefdeville c.chen s.chen A.chernov s.-G.chitic V.chobanova s.cholak m.chrzaszcz A.chubykin V.chulikov p.ciambrone m.F.cicala x.cid Vidal G.ciezarek p.E.L.clarke m.clemencic H.V.cliff j.closier j.L.cobbledick V.coco j.A.B.coelho j.cogan E.cogneras L.cojocariu p.collins T.colombo L.congedo A.contu N.cooke G.coombs G.corti c.m.costa sobral B.couturier D.c.craik j.crkovska m.cruz centro Brasileiro de pesquisas Fisicas(cBpF) Riode JaneiroBrazil Universidade Federal do Riode janeiro(UFRj) Riode JaneiroBrazil center for High Energy physics Tsinghua UniversityBeijingChina school of physics state Key Laboratory of Nuclear physics and Technology Peking UniversityBeijingChina University of chinese Academy of sciences BeijingChina Institute Of High Energy physics(IHEp) BejingChina Institute of particle physics Central China Normal UniversityWuhanHubeiChina Univ.Grenoble Alpes Univ.Savoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance Universite clermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix marseille Univ CNRS/IN2P3CPPMMarseilleFrance Universitq paris-saclay CNRS/IN2P3IJCLabOrsayFrance LpNHE Sorbonne UniversiteParis Diderot Sorbonne Paris CiteCNRS/IN2P3ParisFrance I.physikalisches Institut RWTH Aachen UniversityAachenGermany Fakultat physik Technische Universitat DortmundDortmundGermany max-planck-Institut fir Kernphysik(mpIK) HeidelbergGermany physikalisches Institut Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany school of physics 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 Frascatiltaly INFN sezione di Genova GenovaItaly INFN sezione di milano Bicocca Milanolaly INFN sezione di milano MilanoItaly INFN sezione di cagliari Monserratoltaly Universita degli studi di padova Universita e INFNPadovaPadovaItaly INFN sezione di pisa PisaItaly INFN sezione di Roma Tor Vergata RomaItaly INFN sezione di Roma La sapienza RomaItaly Nikhef National Institute for subatomic physics AmsterdamNetherlands Nikhef National Institute for subatomic physics and VU University Amsterdam AmsterdamNetherlands Henryk Niewodniczanski Institute of Nuclear physics polish Academy of sciences KrakowPoland AGH-University of science and Technology Faculty of Physics and Applied Computer Science

A search for the rare decay B^(0)→j/ψФis performed using pp collision data collected with the LHcb dete-ctor at centre-of-mass energies of 7,8 and 13 TeV,corresponding to an integrated luminosity of9 *** significant signal of the decay is observed and an upper limitof 1.1x 10^(-7)at 90%confidence level is set on the branching fraction.

关键词： B physics flavour physics rare decay ω-Фmixing branching fraction

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search for the rare decays W^(+)→D_(s)^(+)γ and Z→D^(0)γ at LHcb

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chinese physics c 2023年第9期47卷 14-26页

作者： R.Aaij A.s.W.Abdelmotteleb c.Abellan Beteta F.Abudinén T.Ackernley B.Adeva m.Adinolfi p.Adlarson H.Afsharnia c.Agapopoulou c.A.Aidala Z.Ajaltouni s.Akar K.Akiba j.Albrecht F.Alessio m.Alexander A.Alfonso Albero Z.Aliouche p.Alvarez cartelle R.Amalric s.Amato j.L.Amey y.Amhis L.An L.Anderlini m.Andersson A.Andreianov m.Andreotti D.Andreou D.Ao F.Archilli A.Artamonov m.Artuso E.Aslanides m.Atzeni B.Audurier s.Bachmann m.Bachmayer 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.Baryshnikov j.m.Basels G.Bassi B.Batsukh A.Battig A.Bay A.Beck m.Becker F.Bedeschi I.B.Bediaga A.Beiter V.Belavin s.Belin V.Bellee K.Belous I.Belov I.Belyaev G.Benane G.Bencivenni E.Ben-Haim A.Berezhnoy *** *** Andres D.Berninghoff H.c.Bernstein c.Bertella A.Bertolin c.Betancourt F.Betti Ia.Bezshyiko s.Bhasin j.Bhom L.Bian m.s.Bieker N.V.Biesuz s.Bifani p.Billoir A.Biolchini m.Birch F.c.R.Bishop A.Bitadze A.Bizzeti m.p.Blago T.Blake F.Blanc j.E.Blank s.Blusk D.Bobulska j.A.Boelhauve O.Boente Garcia T.Boettcher A.Boldyrev c.s.Bolognani R.Bolzonella N.Bondar F.Borgato s.Borghi m.Borsato j.T.Borsuk s.A.Bouchiba T.j.V.Bowcock A.Boyer c.Bozzi m.j.Bradley s.Braun A.Brea Rodriguez j.Brodzicka A.Brossa Gonzalo j.Brown D.Brundu A.Buonaura L.Buonincontri A.T.Burke c.Burr A.Bursche 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.campana D.H.campora perez A.F.campoverde Quezada s.capelli L.capriotti A.carbone G.carboni R.cardinale A.cardini 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.chadwick m.G.chapman m.charles ph.charpentier c.A.chavez Barajas m.chefdeville c.chen s.chen A.chernov s.chernyshenko V.chobanova s.cholak m.chrzaszcz A.chubykin V.chulikov 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.coelho j.cogan E.cognera centro Brasileiro de pesquisas Físicas(cBpF) Rio de JaneiroBrazil Universidade Federal do Rio de janeiro(UFRj) Rio de JaneiroBrazil center for High Energy physics Tsinghua UniversityBeijingChina Institute Of High Energy physics(IHEp) BeijingChina school of physics state Key Laboratory of Nuclear physics and Technology Peking UniversityBeijingChina University of chinese Academy of sciences BeijingChina Institute of particle physics 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 LpNHE Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.physikalisches Institut RWTH Aachen UniversityAachenGermany Fakultat physik Technische Universitat DortmundDortmundGermany max-planck-Institut für Kernphysik(mpIK) HeidelbergGermany physikalisches Institut Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany school of physics 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 milano MilanoItaly INFN sezione di milano-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 Nikhef National Institute for subatomic physics AmsterdamNetherlands Nikhef National Institute for subatomic physics and VU University Amsterdam AmsterdamNetherlands AGH-University of science and Technology Faculty of Physics and Applied Computer Scienc

A search for the rare decays W^(+)→D_(s)^(+)γ and Z→D0γis performed using proton-proton collision data collected by the LHcb experiment at a centre-of-mass energy of 13TeV,corresponding to an integrated luminosity of 2.0fb−*** significant signal is observed for either decay mode and upper limits on their branching fractions are set using W^(+)→D_(s)^(+)γ and Z→μ+μ−decays as normalization *** upper limits are 6.5×10^(−4) and 2.1×10^(−3) at 95% confidence level for the W^(+)→D_(s)^(+)γ and Z→D^(0)γ decay modes,*** is the first reported search for the Z→D^(0)γ decay,while the upper limit on the W+→D+sγbranching fraction improves upon the previous best limit.

关键词： W/Z boson rare decay upper limit of branching fraction

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search for the doubly charmed baryon ■

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science china(physics,mechanics & Astronomy) 2020年第2期63卷 8-22页

作者： R.Aaij c.Abellán Beteta T.Ackernley B.Adeva m.Adinolfi H.Afsharnia c.A.Aidala s.Aiola Z.Ajaltouni s.Akar p.Albicocco j.Albrecht F.Alessio m.Alexander A.Alfonso Albero G.Alkhazov p.Alvarez cartelle A.A.Alves jr s.Amato y.Amhis L.An L.Anderlini G.Andreassi m.Andreotti F.Archilli j.Arnau Romeu A.Artamonov m.Artuso K.Arzymatov E.Aslanides m.Atzeni B.Audurier s.Bachmann j.j.Back s.Baker V.Balagura W.Baldini A.Baranov R.j.Barlow s.Barsuk W.Barter m.Bartolini F.Baryshnikov G.Bassi V.Batozskaya B.Batsukh A.Battig V.Battista A.Bay m.Becker F.Bedeschi I.Bediaga A.Beiter L.j.Bel V.Belavin s.Belin N.Beliy V.Bellee K.Belous I.Belyaev G.Bencivenni E.Ben-Haim s.Benson s.Beranek A.Berezhnoy *** D.Berninghoff H.c.Bernstein E.Bertholet A.Bertolin c.Betancourt F.Betti m.O.Bettler Ia.Bezshyiko s.Bhasin j.Bhom m.s.Bieker s.Bifani p.Billoir A.Birnkraut A.Bizzeti m.Bjφrn m.p.Blago T.Blake F.Blanc s.Blusk D.Bobulska V.Bocci O.Boente Garcia T.Boettcher A.Boldyrev A.Bondar N.Bondar s.Borghi m.Borisyak m.Borsato j.T.Borsuk T.j.V.Bowcock c.Bozzi s.Braun A.Brea Rodriguez m.Brodski j.Brodzicka A.Brossa Gonzalo D.Brundu E.Buchanan A.Buonaura c.Burr A.Bursche j.s.Butter j.Buytaert W.Byczynski s.cadeddu H.cai R.calabrese s.cali R.calladine m.calvi m.calvo Gomez A.camboni p.campana D.H.campora perez L.capriotti A.carbone G.carboni R.cardinale A.cardini p.carniti K.carvalho Akiba A.casais Vidal G.casse m.cattaneo G.cavallero R.cenci j.cerasoli m.G.chapman m.charles ph.charpentier G.chatzikonstantinidis m.chefdeville V.chekalina c.chen s.chen A.chernov s.-G.chitic V.chobanova m.chrzaszcz A.chubykin p.ciambrone m.F.cicala x.cid Vidal G.ciezarek F.cindolo p.E.L.clarke m.clemencic H.V.cliff j.closier j.L.cobbledick V.coco j.A.B.coelho j.cogan E.cogneras L.cojocariu p.collins T.colombo A.comerma-montells A.contu N.cooke G.coombs s.coquereau G.corti c.m.costa sobral B.couturier D.c.craik j.crkovska A.crocombe m.cruz Torres R.currie c.L.Da silva E.Dall'Occo j.Dalseno c.D'Ambrosio A.Danilina p.d'Argent A.Davis O.De Aguiar Francisco K.De Bruyn s.De capua m centro Brasileiro de pesquisas Fisicas(cBpF) Rio de JaneiroBrazil Universidade Federal do Rio de janeiro(UFRj) Rio de JaneiroBrazil center for High Energy physics Tsinghua UniversityBeijingChina school of physics state Key Laboratory of Nuclear physics and Technology Peking UniversityBeijingChina University of chinese Academy of sciences BeijingChina Institute Of High Energy physics(IHEp) BeijingChina Institute of particle physics Central China Normal UniversityWuhanHubeiChina Univ.Grenoble Alpes Univ.Savoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance Universite clermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix marseille Univ CNRS/IN2P3CPPMMarseilleFrance LAL Univ.Paris-SudCNRS/IN2P3Universite Paris-SaclayOrsayFrance LpNHE Sorbonne Universite Paris Diderot Sorbonne Paris Cite CNRS/IN2P3ParisFrance I.physikalisches Institut RWTH Aachen UniversityAachenGermany Fakultat physik Technische Universitat DortmundDortmundGermany max-planck-Institut für Kernphysik(mpIK) HeidelbergGermany physikalisches Institut Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany school of physics 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 milano-Bicocca MilanoItaly INFN sezione di milano MilanoItaly INFN sezione di cagliari MonserratoItaly INFN sezione di padova PadovaItaly INFN sezione di pisa PisaItaly INFN sezione di Roma Tor Vergata RomaItaly INFN sezione di Roma La sapienza RomaItaly Nikhef National Institute for subatomic physics AmsterdamNetherlands Nikhef National Institute for subatomic physics and VU University Amsterdam AmsterdamNetherlands Henryk Niewodniczanski Institute of Nuclear physics polish Academy of sciences KrakowPoland AGH-University of science and Technology Faculty of Physics and Applied Computer ScienceKrakowPoland Natio

A search for the doubly charmed baryon ■^+cc is performed through its decay to theΛ^+c K^-π^+ final state,using proton-proton collision data collected with the LHcb detector at centre-of-mass energies of 7,8 and 13 *** data correspond to a total integrated luminosity of 9 fb^-*** significant signal is observed in the mass range from 3.4 to 3.8 GeV/c^*** limits are set at 95%credibility level on the ratio of the ■^+cc production cross-section times the branching fraction to that ofΛ^+c and ■^++cc *** limits are determined as functions of the ■^+cc mass for different lifetime hypotheses,in the rapidity range from 2.0 to 4.5 and the transverse momentum range from 4 to 15 GeV/c.

关键词： charmed baryons limits on production of particles charmed quarks experimental tests

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search for the doubly heavy baryon Ξ_(bc)^(+)→ decaying to j/ψΞ_(c)^(+)

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chinese physics c 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.Afsharnia c.Agapopoulou c.A.Aidala s.Aiola Z.Ajaltouni s.Akar K.Akiba j.Albrecht F.Alessio m.Alexander A.Alfonso Albero Z.Aliouche p.Alvarez cartelle s.Amato j.L.Amey y.Amhis L.An L.Anderlini m.Andersson A.Andreianov m.Andreotti D.Andreou D.Ao F.Archilli A.Artamonov m.Artuso E.Aslanides m.Atzeni B.Audurier s.Bachmann m.Bachmayer 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.Baryshnikov j.m.Basels G.Bassi B.Batsukh A.Battig A.Bay A.Beck m.Becker F.Bedeschi I.B.Bediaga A.Beiter V.Belavin s.Belin V.Bellee K.Belous I.Belov I.Belyaev G.Bencivenni E.Ben-Haim A.Berezhnoy *** D.Berninghoff H.c.Bernstein c.Bertella A.Bertolin c.Betancourt F.Betti Ia.Bezshyiko s.Bhasin j.Bhom L.Bian m.s.Bieker N.V.Biesuz s.Bifani p.Billoir A.Biolchini m.Birch F.c.R.Bishop A.Bitadze A.Bizzeti m.p.Blago T.Blake F.Blanc s.Blusk D.Bobulska j.A.Boelhauve O.Boente Garcia T.Boettcher A.Boldyrev N.Bondar s.Borghi m.Borsato j.T.Borsuk s.A.Bouchiba 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.Bursche 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 magalhaes 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.chadwick m.G.chapman m.charles ph.charpentier c.A.chavez Barajas m.chefdeville c.chen s.chen A.chernov s.chernyshenko V.chobanova s.cholak m.chrzaszcz A.chubykin V.chulikov 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.coelho 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 High Energy physics Tsinghua UniversityBeijingChina Institute Of High Energy physics(IHEp) BeijingChina school of physics state Key Laboratory of Nuclear physics and Technology Peking UniversityBeijingChina University of chinese Academy of sciences BeijingChina Institute of particle physics 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 LpNHE Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.physikalisches Institut RWTH Aachen UniversityAachenGermany Fakultät physik Technische Universität DortmundDortmundGermany max-planck-Institut für Kernphysik(mpIK) HeidelbergGermany physikalisches Institut Ruprecht-Karls-Universität HeidelbergHeidelbergGermany school of physics 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 milano MilanoItaly INFN sezione di milano-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 Nikhef National Institute for subatomic physics AmsterdamNetherlands Nikhef National Institute for subatomic physics and VU University Amsterdam AmsterdamNetherlands AGH-University of science and Technology Faculty of Physics and Applied Computer Scienc

A first search for the Ξ_(bc)^(+)j/ψΞ_(c)^(+) decay is performed by the LHcb experiment with a data sample 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 the Ξ+bc baryon production cross-section times the branching fraction relative to that of the B+c→j/ψD+s decay at centre-of-mass energies of 8 and 13 TeV, in the Ξ+bc and in the 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 the Ξ+bc mass and lifetime.

关键词： QcD B physics charm physics spectroscopy

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Targeting cancer cell plasticity by HDAc inhibition to reverse EBV-induced dedifferentiation in nasopharyngeal carcinoma

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signal Transduction and Targeted Therapy 2021年第10期6卷 3045-3061页

作者： jiajun xie Zifeng Wang Wenjun Fan youping Liu Fang Liu xiangbo Wan meiling Liu xuan Wang Deshun zeng Van Wang Bin He min yan Zijian zhang mengjuan zhang Zhijie Hou chunli Wang Zhijie Kang Wenfeng Fang Li zhang Eric W-F Lam xiang Guo jinsong yan yixin zeng mingyuan chen Quentin Liu sun yat-sen University cancer center State Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineGuangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and TherapyGuangzhouChina Institute of cancer stem cell Cancer CenterDalian Medical UniversityDalianChina Department of Hematology Liaoning Key Laboratory of Hematopoietic Stem Cell Transplantation and Translational MedicineLiaoning Medical Center for Hematopoietic Stem Cell TransplantationDalian Key Laboratory of HematologyDiamond Bay Institute of HematologyThe Affiliated Second Hospital of Dalian Medical UniversityDalianChina Department of Radiation Oncology The Sixth Affiliated Hospital of Sun Yat-sen UniversityGuangzhouChina sun yat-sen Institute of Hematology The Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhouChina

Application of differentiation therapy targeting cellular plasticity for the treatment of solid malignancies has been *** carci noma(Npc)is a distinctive cancer with poor differe ntiatio n and high prevalenee of Epstein-Barr virus(EBV)***,we show that the expressi on of EBV latent protein Lmp1 in duces dediffere ntiated and stem-like status with high plasticity through the transcriptional inhibition of ***,Lmp1 upregulates sTAT5A and recruits HDAc 1/2 to the cEBpA locus to reduce its histone *** inhibition restored cEBpA expression,reversing cellular dedifferentiation and stem-like status in mouse xeno graft *** fin dings provide a novel mecha nistic epigenetic-based in sight into virus-induced cellular plasticity and propose a promising concept of differentiation therapy in solid tumor by using HDAc inhibitors to target cellular plasticity.

关键词： Lmp1 cancer plasticity

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search for the doubly heavy baryons Ω^(0)_(bc) and E^(0)_(bc) decaying to Λ^(+)_(c)π^(-) and E^(+)_(c)π^(-)

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chinese physics c 2021年第9期45卷 10-21页

作者： R.Aaij c.Abelian Beteta T.Ackernley B.Adeva m.Adinolfi H.Afshamia c.A.Aidala s.Aiola Z.Ajaltouni s.Aka j.Albrecht F.Alessio m.Alexander A.Alfonso Albero Z.Aliouche G.Alkhazov p.Alvarez cartelie s.Amato y.Amhis L.An L.Anderlini A.Andreianov m.Andreotti F.Archilli A.Artamonov m.Artuso K.Arzymatov E.Aslanides m.Atzeni B.Audurier s.Bachmann m.Bachmayer j.j.Back p.Baladron Rodriguez V.Balagura W.Baldini j.Baptista Leite R.j.Barlow s.Barsuk W.Barter m.Bartolini F.Baryshnikov j.m.Basels G.Bassi B.Batsukh A.Battig A.Bay m.Becker F.Bedeschi I.Bediaga A.Beiter V.Belavin s.Belin V.Bellee K.Belous I.Belov I.Belyaev G.Bencivenni E.Ben-Haim A.Berezhnoy *** D.Beminghoff H.c.Bernstein c.Bertella A.Bertolin c.Betancourt F.Betti Ia.Bezshyiko s.Bhasin j.Bhom L.Bian m.s.Bieker s.Bifani p.Billoir m.Birch F.c.R.Bishop A.Bitadze A.Bizzeti m.Bjorn m.p.Blago T.Blake F.Blanc s.Blusk D.Bobulska j.A.Boelhauve O.Boente Garcia T.Boettcher A.Boldyrev A.Bondar N.Bondar s.Borghi m.Borisyak m.Borsato j.T.Borsuk s.A.Bouchiba T.j.V.Bowcock A.Boyer c.Bozzi m j.Bradley s.Braun A.Brea Rodriguez m.Brodski j.Brodzicka A.Brossa Gonzalo D.Brundu A.Buonaura c.Burr A.Bursche A.Butkevich j.s.Butter j.Buytaert W.Byczynski s.cadeddu H.cai R.calabrese L.calefice L.calero Diaz s.cali R.calladine m.calvi m.calvo Gomez p.camargo magalhaes A.camboni p.campana A.F.campoverde Quezada s.capelli L.capriotti A.carbone G.carboni R.cardinale A.cardini I.carli p.camiti L.carus K.carvalho Akiba A.casais Vidal G.casse m.cattaneo G.cavallero s.celani j.cerasoli A.j.chadwick m.G.chapman m.charles ph.charpentier G.chatzikonstantinidis c.A.chavez Barajas m.chefdeville c.chen s.chen A.chernov V.chobanova s.cholak m.chrzaszcz A.chubykin V.chulikov p.ciambrone m.F.cicala x.cid Vidal G.ciezarek p.E.L.clarke m.clemencic H.V.cliff j.closier j.L.cobbledick V.coco j.A.B.coelho j.cogan E.cogneras L.cojocariu p.collins T.colombo L.congedo A.contu N.cooke G.coombs G.corti c.m.costa sobral B.couturier D.c.craik j.crkovska m.cruz Torres R.currie c.L.Da silva E.Dall'Occo j.Dalseno c.D'Ambrosi centro Brasileiro de pesquisas Fisicas(cBpF) Rio de JaneiroBrazil Universidade Federal do Rio de janeiro(UFRj) Rio de JaneiroBrazil center for High Energy physics Tsinghua UniversityBeijingChina Institute of High Energy physics(IHEp) BeijingChina school of physics state Key Laboratory of Nuclear physics and Technology Peking UniversityBeijingChina University ofchinese Academy of sciences BeijingChina Institute of particle physics Central China Normal UniversityWuhanHubeiChina Univ.savoie mont Blanc CNRSIN2P3-LAPPAnnecyFrance Universite clermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix marseille Univ CNRS/IN2P3CPPMMarseilleFrance Universite paris-saclay CNRS/IN2P3IJCLabOrsayFrance Laboratoire Leprince-Ringuet CNRS/IN2P3Ecole PolytechniqueInstitut Polytechnique de ParisPalaiseauFrance LpNHE Sorbonne UniversiteParis Diderot Sorbonne Paris CiteCNRS/FN2P3ParisFrance I.physikalisches Institut RWTH Aachen UniversityAachenGermany Fakultat physik Technische Universitat DortmundDortmundGermany max-planck-Institut für Kemphysik(mpIK) HeidelbergGermany physikalisches Institut Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany school of physics 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 milano MilanoItaly INFN sezione di milano-Bicocca MilanoItaly INFN sezione di cagliari MonserratoItaly Universita degli studi di padova Universita e INFNPadovaPadovaItaly INFN sezione di pisa PisaItaly INFN sezione di Roma La sapienza RomaItaly INFN sezione di Roma Tor Vergata RomaItaly Nikhef National Institute for subatomic physics AmsterdamNetherlands Nikhef National Institute for subatomic physics and VU University Amsterdam AmsterdamNetherlands AGH-University of science and Technology Faculty of Physics and Applied Computer ScienceKr

The first search for the doubly heavyΩ^(0)_(bc)baryon and a search for the E^(0)_(bc)baryon are performed using pp collision data collected via the LHcb experiment from 2016 to 2018 at a centre-of-mass energy of 13 TeV,corresponding to an integrated luminosity of 5.2 fb^(-1).The baryons are reconstructed via their decays to Λ^(+)_(c)π^(-)and E^(+)_(c)π^(-).No significant excess is fbund for invariant masses between 6700 and 7300 meV/c^(2),in a rapidity range from 2.0 to 4.5 and a transverse momentum range from 2 to 20 meV/*** limits are set on the ratio of the Ω^(0)_(bc)and E^(0)_(bc)production cross-section times the branching fraction to Λ^(+)_(c)π^(-)(E^(+)_(c)π^(-))relative to that of the Λ^(0)_(b)(E^(0)_(b))baryon,for different lifetime hypotheses,at 95%confidence *** upper limits range from 0.5 x 10^(-4)to 2.5 x 10^(-4)for theΩ^(0)_(bc)→Λ^(+)_(c)π^(-)(E^(0)_(bc)→Λ^(+)_(c)π^(-))decay,and from 1.4x 10^(-3)to 6.9 x 10^(-3)for theΩ^(0)_(bc)→E^(+)_(c)π^(-)(E^(0)_(bc)→E^(+)_(c)π^(-))decay,depending on the considered mass and lifetime of theΩ^(0)_(bc)(E^(0)_(bc))baryon.

关键词： B physics quarkonium spectroscopy heavy quark production

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