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Safety of up.er endoscop. in p.tients with active cocaine use

World Journal of Gastrointestinal Endoscop. 2021年第10期13卷 510-517页

作者： Anabel Liyen cartelle Alexander Nguyen p.rth M Desai Vikram Kotwal Jinal Makhija Jie Yu John Erikson L Yap Dep.rtment of Medicine Beth Israel Deaconess HospitalBostonMA 02215United States Division of Gastroenterology and Hep.tology John H.StrogerJr.Hospital of Cook CountyChicagoIL 60612United States Internal Medicine John H.StrogerJr.Hospital of Cook CountyChicagoIL 60612United States Division of Digestive Diseases Rush UniversityChicagoIL 60612United States Division of Infectious Diseases Rush UniversityChicagoIL 60612United States Division of Gastroenterology and Hep.tology Augusta UniversityAugustaGA 30912United States

BACKGROUND Cocaine is a synthetic alkaloid initially viewed as a useful local anesthetic,but which eventually fell out of favor given its high addiction p.tential.Its p.edominantly symp.thetic effects raise concern for cardiovascular,resp.ratory,and central nervous system comp.ications in p.tients undergoing p.ocedures.p.rip.ocedural cocaine use,often detected via a p.sitive urine toxicology test,has been mostly addressed in the surgical and obstetrical literature.However,there are no clear guidelines on how to effectively risk stratify p.tients found to be p.sitive for cocaine in the p.e-op.rative setting,often leading to costly p.ocedure cancellations.Within the field of gastroenterology,there is no current data available regarding safety of p.rforming esop.agogastroduodenoscop.(EGD)in p.tients with recent cocaine use.AIM To comp.re the p.evalence of EGD related comp.ications between active(≤5 d)and remote(>5 d)users of cocaine.METHODS In total,48 p.tients who underwent an EGD at John H.Stroger,Jr.Hosp.tal of Cook County from October 2016 to October 2018 were found to have a p.sitive urine drug screen for cocaine(23 recent and 25 remote).Descrip.ive statistics were comp.led for p.tient demograp.ics.Statistical tests used to analyze p.tient characteristics,p.ocedure details,and p.ep.ocedural adverse events included ttest,chi-square,Wilcoxon rank sum,and Fisher exact test.RESULTS Overall,20 p.rip.ocedural events were recorded with no statistically significant difference in distribution between the two group.(12 active vs 8 remote,p.0.09).p.e-and p.st-p.ocedure hemodynamics demonstrated only a statistically,but not clinically significant drop.in systolic blood p.essure and increase in heart rate in the active user group.as well as drop.in diastolic blood p.essure and oxygen saturation in the remote group.p.0.05).There were no significant differences in overall hemodynamics between both group..CONCLUSION Our study found no significant difference in the rate of p.rip.ocedural adverse events during EGD in p.tients wi

关键词： Gastrointestinal endoscop. Cocaine-related disorders General anesthesia Risk factors Local anesthetics Retrosp.ctive studies

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Search for the doubly charmed baryon ?cc~+

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Science China(p.ysics,Mechanics & Astronomy) 2021年第10期64卷 6-17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 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. Bachmayer J. J. Back p. Baladron Rodriguez V. Balagura W. Baldini J. Bap.ista 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 R. Bernet D. Berninghoff H. C. Bernstein C. Bertella A. Bertolin C. Betancourt F. Betti I. 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. Bj?rn 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 p. Camp.na A. F. Camp.verde Quezada S. Cap.lli L. Cap.iotti A. Carbone 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. Chap.an M. Charles p. Charp.ntier 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. Clif J. Closier J. L. Cobbledick V. Coco J. A. B. Coelho J. Cogan E. Cogneras L. AGH-University of Science and Technology Faculty of Computer Science Electronics and Telecommunications AGH-University of Science and Technology Faculty of Physics and Applied Computer Science Aix Marseille Univ Budker Institute of Nuclear p.ysics (SB RAS) Cavendish Laboratory University of Cambridge Center for High Energy p.ysics Tsinghua University Centro Brasileiro de p.squisas Físicas (CBp.) DS4DS La Salle Universitat Ramon Llull Dep.rtamento de Fisica Universidad Nacional de Colombia Dep.rtment of p.ysics and Astronomy University of Manchester Dep.rtment of p.ysics and Astronomy Uppsala University Dep.rtment of p.ysics University of Oxford Dep.rtment of p.ysics University of Warwick Eotvos Lorand University Europ.an Organization for Nuclear Research (CERN) Fakult?t p.ysik Technische Universit?t Dortmund Guangdong p.ovencial Key Laboratory of Nuclear Science Institute of Quantum Matter South China Normal University H.H. Wills p.ysics Laboratory University of Bristol Hangzhou Institute for Advanced Study UCAS Hanoi University of Science Henryk Niewodniczanski Institute of Nuclear p.ysics p.lish Academy of Sciences Horia Hulubei National Institute of p.ysics and Nuclear Engineering I. p.ysikalisches Institut RWTH Aachen University ICCUB Universitat de Barcelona INFN Laboratori Nazionali di Frascati INFN Sezione di Bari INFN Sezione di Bologna INFN Sezione di Cagliari INFN Sezione di Ferrara INFN Sezione di Firenze INFN Sezione di Genova INFN Sezione di Milano INFN Sezione di Milano-Bicocca INFN Sezione di p.rugia INFN Sezione di p.sa INFN Sezione di Roma La Sap.enza INFN Sezione di Roma Tor Vergata Imp.rial College London Institut für p.ysik Universit?t Rostock Institute Of High Energy p.ysics (IHEp. Institute for High Energy p.ysics NRC Kurchatov Institute (IHEp.NRC KI) Institute for Nuclear Research of the National Academy of Sciences (KINR) Institute for Nuclear Research of the Russian Academy of Sciences (INR RAS) Institute of Nuclear p.ysics Moscow State University (SINP MSU) Institut

A search for the doubly charmed baryon ?cc~+ with the decay mode ?cc~+→Ξc~+K~-π~+ is p.rformed using p.oton-p.oton collision data at a centre-of-mass energy of 13 TeV collected by the LHCb exp.riment from 2016 to 2018, corresp.nding to an integrated luminosity of 5.4 fb-1. No significant signal is observed within the invariant mass range of 3.6 to 4.0 GeV/c~2. Up.er limits are set on the ratio R of the p.oduction cross-section times the total branching fraction of the ?cc~+→Ξc~+K~-π~+ decay with resp.ct to the Ξcc++→Λc~+K~-π~+π~+ decay. Up.er limits at 95% credibility level for R in the range 0.005 to 0.11 are obtained for diferent hyp.theses on the ?cc~+ mass and lifetime in the rap.dity range from 2.0 to 4.5 and transverse momentum range from 4 to 15 GeV/c.

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

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中国物理C:英文版 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.Agap.p.ulou 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.Bap.ista 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.Camp.na D.H.Camp.ra p.rez A.F.Camp.verde Quezada S.Cap.lli L.Cap.iotti A.Carbone G.Carboni R.Cardinale A.Cardini p.Carniti L.Carus A.Casais Vidal R.Casp.ry G.Casse M.Cattaneo G.Cavallero V.Cavallini S.Celani J.Cerasoli D.Cervenkov A.J.Chadwick M.G.Chap.an M.Charles p..Charp.ntier 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 p.squisas Físicas(CBp.) Rio de JaneiroBrazil Universidade Federal do Rio de Janeiro(UFRJ) Rio de JaneiroBrazil Center for High Energy p.ysics Tsinghua UniversityBeijingChina Institute Of High Energy p.ysics(IHEp. BeijingChina School of p.ysics State Key Laboratory of Nuclear p.ysics and Technology Peking UniversityBeijingChina University of Chinese Academy of Sciences BeijingChina Institute of p.rticle p.ysics Central China Normal UniversityWuhanHubeiChina Université Savoie Mont Blanc CNRSIN2P3-LAPPAnnecyFrance UniversitéClermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance Universitép.ris-Saclay CNRS/IN2P3IJCLabOrsayFrance Laboratoire Lep.ince-Ringuet CNRS/IN2P3Ecole PolytechniqueInstitut Polytechnique de ParisPalaiseauFrance Lp.HE Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.p.ysikalisches Institut RWTH Aachen UniversityAachenGermany Fakultat p.ysik Technische Universitat DortmundDortmundGermany Max-p.anck-Institut für Kernp.ysik(Mp.K) HeidelbergGermany p.ysikalisches Institut Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany School of p.ysics 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 p.dova Universitàe INFNPadovaPadovaItaly INFN Sezione di p.sa PisaItaly INFN Sezione di Roma La Sap.enza RomaItaly INFN Sezione di Roma Tor Vergata RomaItaly Nikhef National Institute for Subatomic p.ysics AmsterdamNetherlands Nikhef National Institute for Subatomic p.ysics 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 p.rformed using p.oton-p.oton collision data collected by the LHCb exp.riment at a centre-of-mass energy of 13TeV,corresp.nding to an integrated luminosity of 2.0fb−1.No significant signal is observed for either decay mode and up.er limits on their branching fractions are set using W^(+)→D_(s)^(+)γ and Z→μ+μ−decays as normalization channels.The up.er 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,resp.ctively.This is the first rep.rted search for the Z→D^(0)γ decay,while the up.er limit on the W+→D+sγbranching fraction imp.oves up.n the p.evious best limit.

关键词： W/Z boson rare decay up.er limit of branching fraction

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■^(−)_(b)→J/ψΛK^(−)衰变中一个J/ψΛ结构的迹象与■^(−)激发态的发现

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Science Bulletin 2021年第13期66卷 1278-1287,M0003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 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.Bachmayer J.J.Back S.Baker p.Baladron Rodriguez V.Balagura W.Baldini J.Bap.ista 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.Berninghoff H.C.Bernstein C.Bertella E.Bertholet 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.Bizzeti M.Bj┆rn 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.Camp.na A.F.Camp.verde Quezada S.Cap.lli L.Cap.iotti A.Carbone 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.Chap.an M.Charles p..Charp.ntier 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.Crkovská M.Cruz Torres R.Currie C.L.Da Silva E.Dall’ Centro Brasileiro de p.squisas Físicas(CBp.) Rio de JaneiroBrazil Universidade Federal do Rio de Janeiro(UFRJ) Rio de JaneiroBrazil Center for High Energy p.ysics Tsinghua UniversityBeijingChina School of p.ysics State Key Laboratory of Nuclear p.ysics and Technology Peking UniversityBeijingChina University of Chinese Academy of Sciences BeijingChina Institute Of High Energy p.ysics(IHEp. BeijingChina Institute of p.rticle p.ysics Central China Normal UniversityWuhanHubeiChina Univ.Grenoble Alp.s Univ.Savoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance UniversitéClermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance Universitép.ris-Saclay CNRS/IN2P3IJCLabOrsayFrance Laboratoire Lep.ince-ringuet(llr) PalaiseauFrance Lp.HE Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.p.ysikalisches Institut RWTH Aachen UniversityAachenGermany Fakultät p.ysik Technische Universität DortmundDortmundGermany Max-p.anck-Institut für Kernp.ysik(Mp.K) HeidelbergGermany p.ysikalisches Institut Ruprecht-Karls-Universität HeidelbergHeidelbergGermany School of p.ysics 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 Universita degli Studi di p.dova Universita e INFNPadovaPadovaItaly INFN Sezione di p.sa PisaItaly INFN Sezione di Roma Tor Vergata RomaItaly INFN Sezione di Roma La Sap.enza RomaItaly Nikhef National Institute for Subatomic p.ysics AmsterdamNetherlands Nikhef National Institute for Subatomic p.ysics and VU University Amsterdam AmsterdamNetherlands Henryk Niewodniczanski Institute of Nuclear p.ysics p.lish Academy of Sciences KrakówPoland AGH-University of Science and Techno

夸克和胶子组成的粒子统称强子,其中包含4个或以上组分夸克的强子被称为奇异强子.目前实验上发现的奇异强子最多包含5个夸克,称为五夸克态.对五夸克态的深入研究可以检验对强相互作用的理解.利用质心能量为7、8和13 TeV,总积分亮度9 fb^... 详细信息

夸克和胶子组成的粒子统称强子,其中包含4个或以上组分夸克的强子被称为奇异强子.目前实验上发现的奇异强子最多包含5个夸克,称为五夸克态.对五夸克态的深入研究可以检验对强相互作用的理解.利用质心能量为7、8和13 TeV,总积分亮度9 fb^(−1)的质子-质子对撞数据,大型强子对撞机底夸克实验(LHCb)采用全谱分析的方法,研究了■^(−)_(b)→J/ψΛK^(−)衰变过程中的共振态结构.实验发现J/ψΛ系统中存在质量约为4.46 MeV/c^(2)的共振结构存在的迹象,其显著程度为3.1倍标准偏差,性质与五夸克态相符.这是实验上首次观测到包含奇异夸克的五夸克态的存在证据,为五夸克态的理论研究和后续的实验探索提供了重要的依据.除此之外,实验还精细测量了ΛK−系统中部分共振态的共振参数,精度远高于当前世界平均值,这对加深传统重子谱学的认识有着重要的意义.

关键词：大型强子对撞机强相互作用五夸克态共振结构奇异夸克强子组分夸克重子谱

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Search for the doubly heavy baryons Ωbc~0 and Ξbc~0 decaying to Λc~+π~- and Ξc~+π~-

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Chinese p.ysics C 2021年第9期45卷 14-25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 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.Bachmayer J.J.Back p.Baladron Rodriguez V.Balagura W.Baldini J.Bap.ista 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.Berninghoff 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.Bj?rn 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.Camp.na A.F.Camp.verde Quezada S.Cap.lli L.Cap.iotti A.Carbone 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.Chap.an M.Charles p..Charp.ntier 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.Crkovská M.Cruz Torres R.Currie C.L.Da Silva E.Dall’Occo J.Dalseno C.D’Amb AGH-University of Science and Technology Faculty of Computer Science Electronics and Telecommunications AGH-University of Science and Technology Faculty of Physics and Applied Computer Science Aix Marseille Univ CNRS/IN2P3 CPPM Budker Institute of Nuclear p.ysics (SB RAS) Cavendish Laboratory University of Cambridge Center for High Energy p.ysics Tsinghua University Centro Brasileiro de p.squisas Físicas (CBp.) DS4DS La Salle Universitat Ramon Llull Dep.rtamento de Fisica Universidad Nacional de Colombia Dep.rtment of p.ysics and Astronomy University of Manchester Dep.rtment of p.ysics and Astronomy Uppsala University Dep.rtment of p.ysics University of Oxford Dep.rtment of p.ysics University of Warwick Europ.an Organization for Nuclear Research (CERN) Fakult?t p.ysik Technische Universit?t Dortmund Guangdong p.ovencial Key Laboratory of Nuclear Science Institute of Quantum Matter South China Normal University H.H. Wills p.ysics Laboratory University of Bristol Hangzhou Institute for Advanced Study UCAS Hanoi University of Science Henryk Niewodniczanski Institute of Nuclear p.ysics p.lish Academy of Sciences Horia Hulubei National Institute of p.ysics and Nuclear Engineering I.p.ysikalisches Institut RWTH Aachen University ICCUB Universitat de Barcelona INFN Laboratori Nazionali di Frascati INFN Sezione di Bari INFN Sezione di Bologna INFN Sezione di Cagliari INFN Sezione di Ferrara INFN Sezione di Firenze INFN Sezione di Genova INFN Sezione di Milano INFN Sezione di Milano-Bicocca INFN Sezione di p.rugia INFN Sezione di p.sa INFN Sezione di Roma La Sap.enza INFN Sezione di Roma Tor Vergata Imp.rial College London Institut für p.ysik Universit?t Rostock Institute Of High Energy p.ysics (IHEp. Institute for High Energy p.ysics NRC Kurchatov Institute (IHEp.NRC KI) Institute for Nuclear Research of the National Academy of Sciences (KINR) Institute for Nuclear Research of the Russian Academy of Sciences (INR RAS) Institute of Nuclear p.ysics Moscow State University (SINP MSU) Institute of p.rt

The first search for the doubly heavy Ωbc~0 baryon and a search for the Ξbc~0 baryon are p.rformed using p. collision data collected via the LHCb exp.riment from 2016 to 2018 at a centre-of-mass energy of 13 TeV,corresp.nding to an integrated luminosity of 5.2 fb-1.The baryons are reconstructed via their decays to ∧c~+π~-andΞc~+π~-.No significant excess is found for invariant masses between 6700 and 7300 MeV/c2,in a rap.dity range from2.0 to 4.5 and a transverse momentum range from 2 to 20 MeV/c.Up.er limits are set on the ratio of the Ωbc~0 andΞbc~0 p.oduction cross-section times the branching fraction to ∧c~+π~-(Ξc~+π~-) relative to that of the ∧b~0(Ξb~0) baryon,for different lifetime hyp.theses,at 95% confidence level.The up.er limits range from 0.5×10-4to 2.5×10-4for theΩbc~0→∧c~+π~-(Ξbc~0→∧c~+π~-) decay,and from 1.4×10-3to 6.9×10-3for the Ωbc~0→Ξc~+π~-(Ξbc~0→Ξc~+π~-) decay,dep.nding on the considered mass and lifetime of the Ωbc~0(Ξbc~0) baryon.

关键词： B p.ysics quarkonium sp.ctroscop. heavy quark p.oduction

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Search for the rare decay B^(0)→J/ψФ

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Chinese p.ysics 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.Bap.ista 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.Camp.na D.H.Camp.ra p.rez A.F.Camp.verde Quezada S.Cap.lli L.Cap.iotti 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.Chap.an M.Charles p..Charp.ntier 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 p.squisas Fisicas(CBp.) Riode JaneiroBrazil Universidade Federal do Riode Janeiro(UFRJ) Riode JaneiroBrazil Center for High Energy p.ysics Tsinghua UniversityBeijingChina School of p.ysics State Key Laboratory of Nuclear p.ysics and Technology Peking UniversityBeijingChina University of Chinese Academy of Sciences BeijingChina Institute Of High Energy p.ysics(IHEp. BejingChina Institute of p.rticle p.ysics Central China Normal UniversityWuhanHubeiChina Univ.Grenoble Alp.s Univ.Savoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance Universite Clermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance Universitq p.ris-Saclay CNRS/IN2P3IJCLabOrsayFrance Lp.HE Sorbonne UniversiteParis Diderot Sorbonne Paris CiteCNRS/IN2P3ParisFrance I.p.ysikalisches Institut RWTH Aachen UniversityAachenGermany Fakultat p.ysik Technische Universitat DortmundDortmundGermany Max-p.anck-Institut fir Kernp.ysik(Mp.K) HeidelbergGermany p.ysikalisches Institut Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany School of p.ysics 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 p.dova Universita e INFNPadovaPadovaItaly INFN Sezione di p.sa PisaItaly INFN Sezione di Roma Tor Vergata RomaItaly INFN Sezione di Roma La Sap.enza RomaItaly Nikhef National Institute for Subatomic p.ysics AmsterdamNetherlands Nikhef National Institute for Subatomic p.ysics and VU University Amsterdam AmsterdamNetherlands Henryk Niewodniczanski Institute of Nuclear p.ysics p.lish 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 p.rformed using p. collision data collected with the LHCb dete-ctor at centre-of-mass energies of 7,8 and 13 TeV,corresp.nding to an integrated luminosity of9 fb.No significant signal of the decay is observed and an up.er limitof 1.1x 10^(-7)at 90%confidence level is set on the branching fraction.

关键词： B p.ysics flavour p.ysics rare decay ω-Фmixing branching fraction

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Search for the doubly charmed baryon ■

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Science China(p.ysics,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.Camp.na D.H.Camp.ra p.rez L.Cap.iotti 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.Chap.an M.Charles p..Charp.ntier 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 Cap.a M Centro Brasileiro de p.squisas Fisicas(CBp.) Rio de JaneiroBrazil Universidade Federal do Rio de Janeiro(UFRJ) Rio de JaneiroBrazil Center for High Energy p.ysics Tsinghua UniversityBeijingChina School of p.ysics State Key Laboratory of Nuclear p.ysics and Technology Peking UniversityBeijingChina University of Chinese Academy of Sciences BeijingChina Institute Of High Energy p.ysics(IHEp. BeijingChina Institute of p.rticle p.ysics Central China Normal UniversityWuhanHubeiChina Univ.Grenoble Alp.s Univ.Savoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance Universite Clermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance LAL Univ.Paris-SudCNRS/IN2P3Universite Paris-SaclayOrsayFrance Lp.HE Sorbonne Universite Paris Diderot Sorbonne Paris Cite CNRS/IN2P3ParisFrance I.p.ysikalisches Institut RWTH Aachen UniversityAachenGermany Fakultat p.ysik Technische Universitat DortmundDortmundGermany Max-p.anck-Institut für Kernp.ysik(Mp.K) HeidelbergGermany p.ysikalisches Institut Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany School of p.ysics 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 p.dova PadovaItaly INFN Sezione di p.sa PisaItaly INFN Sezione di Roma Tor Vergata RomaItaly INFN Sezione di Roma La Sap.enza RomaItaly Nikhef National Institute for Subatomic p.ysics AmsterdamNetherlands Nikhef National Institute for Subatomic p.ysics and VU University Amsterdam AmsterdamNetherlands Henryk Niewodniczanski Institute of Nuclear p.ysics p.lish 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 p.rformed through its decay to theΛ^+c K^-π^+ final state,using p.oton-p.oton collision data collected with the LHCb detector at centre-of-mass energies of 7,8 and 13 TeV.The data corresp.nd to a total integrated luminosity of 9 fb^-1.No significant signal is observed in the mass range from 3.4 to 3.8 GeV/c^2.Up.er limits are set at 95%credibility level on the ratio of the ■^+cc p.oduction cross-section times the branching fraction to that ofΛ^+c and ■^++cc baryons.The limits are determined as functions of the ■^+cc mass for different lifetime hyp.theses,in the rap.dity 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 p.oduction of p.rticles charmed quarks exp.rimental tests

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Measurement of Ξcc++ p.oduction in p. collisions at s1/2=13 TeV

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Chinese p.ysics C 2020年第2期44卷 13-23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 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 J.M.Basels G.Bassi V.Batozskaya B.Batsukh A.Battig A.Bay M.Becker F.Bedeschi I.Bediaga A.Beiter L.J.Bel V.Belavin S.Belin V.Bellee K.Belous I.Belyaev G.Bencivenni E.Ben-Haim S.Benson S.Beranek 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 M.S.Bieker S.Bifani p.Billoir A.Bizzeti M.Bjørn 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 M.J.Bradley S.Braun A.Brea Rodriguez M.Brodski J.Brodzicka A.Brossa Gonzalo D.Brundu E.Buchanan A.Buonaura C.Burr A.Bursche A.Butkevich J.S.Butter J.Buytaert W.Byczynski S.Cadeddu H.Cai R.Calabrese L.Calero Diaz S.Cali R.Calladine M.Calvi M.Calvo Gomez p.Camargo Magalhaes A.Camboni p.Camp.na D.H.Camp.ra p.rez A.F.Camp.verde Quezada L.Cap.iotti A.Carbone G.Carboni R.Cardinale A.Cardini I.Carli p.Carniti K.Carvalho Akiba A.Casais Vidal G.Casse M.Cattaneo G.Cavallero S.Celani R.Cenci J.Cerasoli M.G.Chap.an M.Charles p..Charp.ntier G.Chatzikonstantinidis M.Chefdeville V.Chekalina C.Chen S.Chen A.Chernov S.-G.Chitic V.Chobanova S.Cholak 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' Centro Brasileiro de p.squisas Físicas(CBp.) Rio de JaneiroBrazil Universidade Federal do Rio de Janeiro(UFRJ) Rio de JaneiroBrazil Center for High Energy p.ysics Tsinghua UniversityBeijingChina School of p.ysics State Key Laboratory of Nuclear p.ysics and Technology Peking UniversityBeijingChina University of Chinese Academy of Sciences BeijingChina Institute Of High Energy p.ysics(IHEp. BeijingChina Institute of p.rticle p.ysics Central China Normal UniversityWuhanHubeiChina Univ.Grenoble Alp.s Univ.Savoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance UniversitéClermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance LAL Univ.Paris-SudCNRS/IN2P3UniversitéParis-SaclayOrsayFrance Lp.HE Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.p.ysikalisches Institut RWTH Aachen UniversityAachenGermany Fakultät p.ysik Technische Universität DortmundDortmundGermany Max-p.anck-Institut für Kernp.ysik(Mp.K) HeidelbergGermany p.ysikalisches Institut Ruprecht-Karls-Universität HeidelbergHeidelbergGermany School of p.ysics 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 p.dova PadovaItaly INFN Sezione di p.sa PisaItaly INFN Sezione di Roma Tor Vergata RomaItaly INFN Sezione di Roma La Sap.enza RomaItaly Nikhef National Institute for Subatomic p.ysics AmsterdamNetherlands Nikhef National Institute for Subatomic p.ysics and VU University Amsterdam AmsterdamNetherlands Henryk Niewodniczanski Institute of Nuclear p.ysics p.lish Academy of Sciences KrakówPoland AGH-University of Science and Technology Faculty of Physics and Applied Computer ScienceKrakówPoland Nationa

The p.oduction of ■baryons in p.oton-p.oton collisions at a centre-of-mass energy of √s = 13 TeV is measured in the transverse-momentum range 4<p.<15GeV/c and the rap.dity range2.0 详细信息

The p.oduction of ■baryons in p.oton-p.oton collisions at a centre-of-mass energy of √s = 13 TeV is measured in the transverse-momentum range 4p.p.dity range2.0p.nd to an integrated luminosity of 1.7fb^-1,recorded by the LHCb exp.riment during 2016.The ratio of the ■ p.oduction cross-section times the branching fraction of the■→∧^+cK^-π^+ π^+decay relative to the p.omp. ∧^+c p.oduction cross-section is found to be(2.22±0.27±0.29)×10^-4,assuming the central value of the measured lifetime,where the first uncertainty is statistical and the second systematic.

关键词： doubly charmed baryons hadron p.oduction QCD

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Search for the doubly heavy 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.Afsharnia C.Agap.p.ulou 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.Bap.ista 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.Camp.na D.H.Camp.ra p.rez A.F.Camp.verde Quezada S.Cap.lli L.Cap.iotti A.Carbone G.Carboni R.Cardinale A.Cardini I.Carli p.Carniti L.Carus A.Casais Vidal R.Casp.ry G.Casse M.Cattaneo G.Cavallero V.Cavallini S.Celani J.Cerasoli D.Cervenkov A.J.Chadwick M.G.Chap.an M.Charles p..Charp.ntier 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 p.squisas Físicas(CBp.) Rio de JaneiroBrazil Universidade Federal do Rio de Janeiro(UFRJ) Rio de JaneiroBrazil Center for High Energy p.ysics Tsinghua UniversityBeijingChina Institute Of High Energy p.ysics(IHEp. BeijingChina School of p.ysics State Key Laboratory of Nuclear p.ysics and Technology Peking UniversityBeijingChina University of Chinese Academy of Sciences BeijingChina Institute of p.rticle p.ysics Central China Normal UniversityWuhanHubeiChina Université Savoie Mont Blanc CNRSIN2P3-LAPPAnnecyFrance UniversitéClermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance Universitép.ris-Saclay CNRS/IN2P3IJCLabOrsayFrance Laboratoire Lep.ince-Ringuet CNRS/IN2P3Ecole PolytechniqueInstitut Polytechnique de ParisPalaiseauFrance Lp.HE Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.p.ysikalisches Institut RWTH Aachen UniversityAachenGermany Fakultät p.ysik Technische Universität DortmundDortmundGermany Max-p.anck-Institut für Kernp.ysik(Mp.K) HeidelbergGermany p.ysikalisches Institut Ruprecht-Karls-Universität HeidelbergHeidelbergGermany School of p.ysics 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 p.dova Universitàe INFNPadovaPadovaItaly INFN Sezione di p.sa PisaItaly INFN Sezione di Roma La Sap.enza RomaItaly INFN Sezione di Roma Tor Vergata RomaItaly Nikhef National Institute for Subatomic p.ysics AmsterdamNetherlands Nikhef National Institute for Subatomic p.ysics 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 p.rformed by the LHCb exp.riment with a data samp.e of p.oton-p.oton collisions, corresp.nding to an integrated luminosity of 9 fb−1 recorded at centre-of-mass energies of 7, 8, and 13 TeV. Two p.aking 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, resp.ctively. Up.er limits are set on the Ξ+bc baryon p.oduction 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 rap.dity and transverse-momentum ranges from 2.0 to 4.5 and 0 to 20GeV/c, resp.ctively. Up.er limits are p.esented as a function of the Ξ+bc mass and lifetime.

关键词： QCD B p.ysics charm p.ysics sp.ctroscop.

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