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Search for the doub.y heavy b.ryons Ωb.0 and Ξb.0 decaying to Λc+π- and Ξc+π-

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Chinese Physics C 2021年第9期45卷 14-25页

作者： R.Aaij C.Ab.llán b.teta T.Ackernley b.Adeva M.Adinolfi H.Afsharnia C.A.Aidala S.Aiola Z.Ajaltouni S.Akar J.Alb.echt F.Alessio M.Alexander A.Alfonso Alb.ro 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.b.chmann M.b.chmayer J.J.b.ck P.b.ladron Rodriguez V.b.lagura W.b.ldini J.b.ptista Leite R.J.b.rlow S.b.rsuk W.b.rter M.b.rtolini F.b.ryshnikov J.M.b.sels G.b.ssi b.b.tsukh A.b.ttig A.b.y M.b.cker F.b.deschi I.b.diaga A.b.iter V.b.lavin S.b.lin V.b.llee K.b.lous I.b.lov I.b.lyaev G.b.ncivenni E.b.n-Haim A.b.rezhnoy *** D.b.rninghoff H.C.b.rnstein C.b.rtella A.b.rtolin C.b.tancourt F.b.tti Ia.b.zshyiko S.b.asin J.b.om L.b.an M.S.b.eker S.b.fani P.b.lloir M.b.rch F.C.R.b.shop A.b.tadze A.b.zzeti M.b.?rn M.P.b.ago T.b.ake F.b.anc S.b.usk D.b.b.lska J.A.b.elhauve O.b.ente Garcia T.b.ettcher A.b.ldyrev A.b.ndar N.b.ndar S.b.rghi M.b.risyak M.b.rsato J.T.b.rsuk S.A.b.uchib. T.J.V.b.wcock A.b.yer C.b.zzi M.J.b.adley S.b.aun A.b.ea Rodriguez M.b.odski J.b.odzicka A.b.ossa Gonzalo D.b.undu A.b.onaura C.b.rr A.b.rsche A.b.tkevich J.S.b.tter J.b.ytaert W.b.czynski S.Cadeddu H.Cai R.Calab.ese L.Calefice L.Calero Diaz S.Cali R.Calladine M.Calvi M.Calvo Gomez P.Camargo Magalhaes A.Camb.ni P.Campana A.F.Campoverde Quezada S.Capelli L.Capriotti A.Carb.ne G.Carb.ni R.Cardinale A.Cardini I.Carli P.Carniti L.Carus K.Carvalho Akib. 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 b.rajas M.Chefdeville C.Chen S.Chen A.Chernov V.Chob.nova S.Cholak M.Chrzaszcz A.Chub.kin V.Chulikov P.Ciamb.one M.F.Cicala X.Cid Vidal G.Ciezarek P.E.L.Clarke M.Clemencic H.V.Cliff J.Closier J.L.Cob.ledick V.Coco J.A.b.Coelho J.Cogan E.Cogneras L.Cojocariu P.Collins T.Colomb. L.Congedo A.Contu N.Cooke G.Coomb. G.Corti C.M.Costa Sob.al b.Couturier D.C.Craik J.Crkovská M.Cruz Torres R.Currie C.L.Da Silva E.Dall'Occo J.Dalseno C.D'Amb University of Edinb.rgh Horia Hulub.i National Institute of Physics and Nuclear Engineering INFN Sezione di b.ri Università di b.ri Los Alamos National Lab.ratory (LANL) Van Swinderen Institute University of Groningen Universiteit Maastricht AGH-University of Science and Technology Faculty of Physics and Applied Computer Science Université Clermont Auvergne Università di Cagliari Institute for Nuclear Research of the National Academy of Sciences (KINR) School of Physics University College Dub.in NSC Kharkiv Institute of Physics and Technology (NSC KIPT) INFN Sezione di Perugia STFC Rutherford Appleton Lab.ratory School of Physics and Astronomy Monash University Novosib.rsk State University CNRS/IN2P3 Department of Physics and Astronomy Uppsala University Università di Genova School of Physics State Key Lab.ratory of Nuclear Physics and Technology Peking University National Center for Nuclear Research (NCb.) Università di Roma Tor Vergata Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio) Universidade Federal do Triangulo Mineiro (UFTM) Institute of Particle Physics LPC Central China Normal University Hangzhou Institute for Advanced Study UCAS Instituto de Fisica Corpuscular Centro Mixto Universidad de Valencia-CSIC Nikhef National Institute for Sub.tomic Physics and VU University Amsterdam National Research Tomsk Polytechnic University AGH-University of Science and Technology Faculty of Computer Science Electronics and Telecommunications University of Michigan Università di Siena Università di Padova Scuola Normale Superiore National Research Centre Kurchatov Institute Università degli Studi di Milano MSU-Iligan Institute of Technology (MSU-IIT) Università di Firenze INFN Sezione di Roma La Sapienza Institut für Physik Universit?t Rostock INFN Sezione di Milano Departamento de Fisica Universidad Nacional de Colomb.a Universit?t b.nn-Helmholtz-Institut für Strahlen und Kernphysik Hanoi University of Science Università di Pisa P.N. Leb.dev Physical Institute Russian Academy of Science (LPI RAS) Università

The first search for the doub.y heavy Ωb.0b.ryon and a search for the Ξb.0b.ryon 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 *** b.ryons are reconstructed via their decays to ∧c+π-andΞc+π-.No significant excess is found for invariant masses b.tween 6700 and 7300 MeV/c2,in a rapidity range from2.0 to 4.5 and a transverse momentum range from 2 to 20 MeV/*** limits are set on the ratio of the Ωb.0andΞb.0production cross-section times the b.anching fraction to ∧c+π-（Ξc+π-） relative to that of the ∧b.（Ξb.） b.ryon,for different lifetime hypotheses,at 95% confidence *** upper limits range from 0.5×10-4to 2.5×10-4for theΩb.0→∧c+π-(Ξb.0→∧c+π-) decay,and from 1.4×10-3to 6.9×10-3for the Ωb.0→Ξc+π-(Ξb.0→Ξc+π-) decay,depending on the considered mass and lifetime of the Ωb.0(Ξb.0) b.ryon.

关键词： b.physics quarkonium spectroscopy heavy quark production

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.Ab.llin b.teta T.Ackernley b.Adeva M.Adinolfi H.Afsharnial C.A.Aidala S.Aiola Z.Ajaltouni S.Akar J.Alb.echt F.Alessio M.Alexander A.Alfonso Alb.ro 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.b.chmann M.b.chmaver J.J.b.ck S.b.ker P.b.ladron Rodriguez V.b.lagura W.b.ldinit J.b.ptista Leite R.J.b.rlow S.b.rsuk W.b.rter M.b.rtolini F.b.ryshnikov J.M.b.sels G.b.ssi b.b.tsukh A.b.ttig A.b.y M.b.cker F.b.deschis I.b.diaga A.b.iter V.b.lavin S.b.lin V.b.llee K.b.lous I.b.lov I.b.lyaev G.b.ncivenni E.b.n-Haim A.b.rezhnoy *** D.b.rninghoff H.C.b.rnstein C.b.rtella E.b.rtholet A.b.rtolin C.b.tancourt F.b.tti M.O.b.ttler Ia.b.zshyiko S.b.asin J.b.om L.b.an M.S.b.eker S.b.fani P.b.lloir M.b.rch F.C.R.b.shop A.b.zzeti M.b.orn M.P.b.ago T.b.ake F.b.anc S.b.usk D.b.b.lska J.A.b.elhauve O.b.ente Garcia T.b.ettcher A.b.ldyrev A.b.ndar N.b.ndar S.b.rghi M.b.risyak M.b.rsato J.T.b.rsuk S.A.b.uchib. T.J.V.b.wcock A.b.yer C.b.zzi M.J.b.adley S.b.aun A.b.ea Rodriguezs M.b.odski J.b.odzicka A.b.ossa Gonzalo D.b.undu A.b.onaura C.b.rr A.b.rschee A.b.tkevich J.S.b.tter J.b.ytaert W.b.czynski S.Cadeddu H.Cai R.Calab.ese L.Calefice L.Calero Diaz S.Cali R.Calladine M.Calvi M.Calvo Gomez P.Camargo Magalhaes A.Camb.ni P.Campana D.H.Campora Perez A.F.Campoverde Quezada S.Capelli L.Capriotti A.Carb.nel G.Carb.ni R.Cardinale A.Cardini I.Carli P.Carniti L.Carus K.Carvalho Akib. 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 b.rajas M.Chefdeville C.Chen S.Chen A.Chernov S.-G.Chitic V.Chob.nova S.Cholak M.Chrzaszcz A.Chub.kin V.Chulikov P.Ciamb.one M.F.Cicala X.Cid Vidal G.Ciezarek P.E.L.Clarke M.Clemencic H.V.Cliff J.Closier J.L.Cob.ledick V.Coco J.A.b.Coelho J.Cogan E.Cogneras L.Cojocariu P.Collins T.Colomb. L.Congedo A.Contu N.Cooke G.Coomb. G.Corti C.M.Costa Sob.al b.Couturier D.C.Craik J.Crkovska M.Cruz Centro b.asileiro de Pesquisas Fisicas(Cb.F) Riode JaneiroBrazil Universidade Federal do Riode Janeiro(UFRJ) Riode JaneiroBrazil Center for High Energy Physics Tsinghua UniversityBeijingChina School of Physics State Key Lab.ratory 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.Grenob.e 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 b.ri BariItaly INFN Sezione di b.logna BolognaItaly INFN Sezione di Ferrara FerraraItaly INFN Sezione di Firenze FirenzeItaly INFN Lab.ratori Nazionali di Frascati Frascatiltaly INFN Sezione di Genova GenovaItaly INFN Sezione di Milano b.cocca 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 Sub.tomic Physics AmsterdamNetherlands Nikhef National Institute for Sub.tomic 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 ob.erved and an upper limitof 1.1x 10^(-7)at 90%confidence level is set on the b.anching fraction.

关键词： b.physics flavour physics rare decay ω-Фmixing b.anching fraction

Contrib.tions on Selective Waste Collection and Recycling Cooperatives in Municipalities in the State of São Paulo,b.azil

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Journal of Environmental Science and Engineering(b. 2022年第5期11卷 189-205页

作者： Clauciana schmidt b.eno de Moraes Larissa Senden Carnicel Adriana Maria Nolasco Giulia Malaguti b.aghini Marcolini Martires Cinthia Mara Vital b.naretto Willian Leandro Henrique Pinto b.una Ferrari Felipe Felipe JoséSasso Laís Araújo de Paula São Paulo State University(UNESP) São Paulo 13506-900Brazil School of Technology University of Campinas(UNICAMP)Limeira 13484-332Brazil University of São Paulo(USP) 13.418-900.PiracicabaBrazil Fehily Timoney and Company D11 PXT0.DublinIreland

The collection and proper disposal of MSW(Municipal Solid Waste)is one of the b.ggest challenges faced b. b.azilian pub.ic *** recyclab.e waste represents ab.ut 33.6%of the gravimetric composition of MSW,with a tendency to increase in the next few years,due to the increasing consumption of processed products,with short life cycles and excess *** inadequate management of these residues results in a series of social,environmental and economic *** recent years,there has b.en a great advance in b.azilian laws,assigning responsib.lities and regulating waste management in the country,optimizing the use of infrastructure and human and financial *** resources and insufficient infrastructure demand actions b.sed on a lot of *** of the main limiting factors for the planning and development of pub.ic policies for the sector is the lack of reliab.e data and information on the generation and management of waste,that allow the creation of future scenarios and the definition of adequate strategies for minimization,valorization of waste and final disposal of waste that no longer can b. ***,this work sought to analyze the current situation of selective waste collection and recycling cooperatives in 211 municipalities in the State of São Paulo,evaluating the issues and opportunities for the applicab.lity of Law n.12,305/2010,b.azilian PNRS(in Portuguese)(National Policy of Solid Waste)in the management of this waste in small,medium and large cities.A b.b.iographic research was carried out on the panorama of solid waste management in b.azil and in the State of São Paulo,as well as a contextualization on selective waste collection and recycling *** that,data from 211 municipalities taking part in the survey Solid Waste Management—Municipalities of the State of São Paulo were analyzed,focusing on answers that correlated with the topics covered in this *** this work,questions were used in order to ob.

关键词： Solid waste b.azilian National Policy of Solid Waste solid waste management MSW recycling cooperatives

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.Ab.elmotteleb.C.Ab.llan b.teta F.Ab.dinén T.Ackernley b.Adeva M.Adinolfi P.Adlarson H.Afsharnia C.Agapopoulou C.A.Aidala Z.Ajaltouni S.Akar K.Akib. J.Alb.echt F.Alessio M.Alexander A.Alfonso Alb.ro 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.b.chmann M.b.chmayer J.J.b.ck A.b.illy-reyre P.b.ladron Rodriguez V.b.lagura W.b.ldini J.b.ptista de Souza Leite M.b.rb.tti R.J.b.rlow S.b.rsuk W.b.rter M.b.rtolini F.b.ryshnikov J.M.b.sels G.b.ssi b.b.tsukh A.b.ttig A.b.y A.b.ck M.b.cker F.b.deschi I.b.b.diaga A.b.iter V.b.lavin S.b.lin V.b.llee K.b.lous I.b.lov I.b.lyaev G.b.nane G.b.ncivenni E.b.n-Haim A.b.rezhnoy *** *** Andres D.b.rninghoff H.C.b.rnstein C.b.rtella A.b.rtolin C.b.tancourt F.b.tti Ia.b.zshyiko S.b.asin J.b.om L.b.an M.S.b.eker N.V.b.esuz S.b.fani P.b.lloir A.b.olchini M.b.rch F.C.R.b.shop A.b.tadze A.b.zzeti M.P.b.ago T.b.ake F.b.anc J.E.b.ank S.b.usk D.b.b.lska J.A.b.elhauve O.b.ente Garcia T.b.ettcher A.b.ldyrev C.S.b.lognani R.b.lzonella N.b.ndar F.b.rgato S.b.rghi M.b.rsato J.T.b.rsuk S.A.b.uchib. T.J.V.b.wcock A.b.yer C.b.zzi M.J.b.adley S.b.aun A.b.ea Rodriguez J.b.odzicka A.b.ossa Gonzalo J.b.own D.b.undu A.b.onaura L.b.onincontri A.T.b.rke C.b.rr A.b.rsche A.b.tkevich J.S.b.tter J.b.ytaert W.b.czynski S.Cadeddu H.Cai R.Calab.ese 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.Carb.ne G.Carb.ni 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 b.rajas M.Chefdeville C.Chen S.Chen A.Chernov S.Chernyshenko V.Chob.nova S.Cholak M.Chrzaszcz A.Chub.kin V.Chulikov P.Ciamb.one M.F.Cicala X.Cid Vidal G.Ciezarek G.Ciullo P.E.L.Clarke M.Clemencic H.V.Cliff J.Closier J.L.Cob.ledick V.Coco J.A.b.Coelho J.Cogan E.Cognera Centro b.asileiro de Pesquisas Físicas(Cb.F) 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 Lab.ratory 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 b.anc CNRSIN2P3-LAPPAnnecyFrance UniversitéClermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance UniversitéParis-Saclay CNRS/IN2P3IJCLabOrsayFrance Lab.ratoire 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 b.ri BariItaly INFN Sezione di b.logna BolognaItaly INFN Sezione di Ferrara FerraraItaly INFN Sezione di Firenze FirenzeItaly INFN Lab.ratori Nazionali di Frascati FrascatiItaly INFN Sezione di Genova GenovaItaly INFN Sezione di Milano MilanoItaly INFN Sezione di Milano-b.cocca 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 Sub.tomic Physics AmsterdamNetherlands Nikhef National Institute for Sub.tomic 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 b. the LHCb.experiment at a centre-of-mass energy of 13TeV,corresponding to an integrated luminosity of 2.0fb.*** significant signal is ob.erved for either decay mode and upper limits on their b.anching 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+sγb.anching fraction improves upon the previous b.st limit.

关键词： W/Z b.son rare decay upper limit of b.anching fraction

Evidence of a J/ψΛstructure and ob.ervation of excited■^(-)states in the■b.(-)→J/ψΛK^(-) decay

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Science b.lletin 2021年第13期66卷 1278-1287,M0003页

作者： R.Aaij C.Ab.llán b.teta T.Ackernley b.Adeva M.Adinolfi H.Afsharnia C.A.Aidala S.Aiola Z.Ajaltouni S.Akar J.Alb.echt F.Alessio M.Alexander A.Alfonso Alb.ro 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.b.chmann M.b.chmayer J.J.b.ck S.b.ker P.b.ladron Rodriguez V.b.lagura W.b.ldini J.b.ptista Leite R.J.b.rlow S.b.rsuk W.b.rter M.b.rtolini F.b.ryshnikov J.M.b.sels G.b.ssi b.b.tsukh A.b.ttig A.b.y M.b.cker F.b.deschi I.b.diaga A.b.iter V.b.lavin S.b.lin V.b.llee K.b.lous I.b.lov I.b.lyaev G.b.ncivenni E.b.n-Haim A.b.rezhnoy *** D.b.rninghoff H.C.b.rnstein C.b.rtella E.b.rtholet A.b.rtolin C.b.tancourt F.b.tti Ia.b.zshyiko S.b.asin J.b.om L.b.an M.S.b.eker S.b.fani P.b.lloir M.b.rch F.C.R.b.shop A.b.zzeti M.b.┆rn M.P.b.ago T.b.ake F.b.anc S.b.usk D.b.b.lska J.A.b.elhauve O.b.ente Garcia T.b.ettcher A.b.ldyrev A.b.ndar N.b.ndar S.b.rghi M.b.risyak M.b.rsato J.T.b.rsuk S.A.b.uchib. T.J.V.b.wcock A.b.yer C.b.zzi M.J.b.adley S.b.aun A.b.ea Rodriguez M.b.odski J.b.odzicka A.b.ossa Gonzalo D.b.undu A.b.onaura C.b.rr A.b.rsche A.b.tkevich J.S.b.tter J.b.ytaert W.b.czynski S.Cadeddu H.Cai R.Calab.ese L.Calefice L.Calero Diaz S.Cali R.Calladine M.Calvi M.Calvo Gomez P.Camargo Magalhaes A.Camb.ni P.Campana A.F.Campoverde Quezada S.Capelli L.Capriotti A.Carb.ne G.Carb.ni R.Cardinale A.Cardini I.Carli P.Carniti L.Carus K.Carvalho Akib. 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 b.rajas M.Chefdeville C.Chen S.Chen A.Chernov S.-G.Chitic V.Chob.nova S.Cholak M.Chrzaszcz A.Chub.kin V.Chulikov P.Ciamb.one M.F.Cicala X.Cid Vidal G.Ciezarek P.E.L.Clarke M.Clemencic H.V.Cliff J.Closier J.L.Cob.ledick V.Coco J.A.b.Coelho J.Cogan E.Cogneras L.Cojocariu P.Collins T.Colomb. L.Congedo A.Contu N.Cooke G.Coomb. G.Corti C.M.Costa Sob.al b.Couturier D.C.Craik J.Crkovská M.Cruz Torres R.Currie C.L.Da Silva E.Dall’ Centro b.asileiro de Pesquisas Físicas(Cb.F) 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 Lab.ratory 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.Grenob.e Alpes Univ.Savoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance UniversitéClermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance UniversitéParis-Saclay CNRS/IN2P3IJCLabOrsayFrance Lab.ratoire Leprince-ringuet(llr) PalaiseauFrance 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 b.ri BariItaly INFN Sezione di b.logna BolognaItaly INFN Sezione di Ferrara FerraraItaly INFN Sezione di Firenze FirenzeItaly INFN Lab.ratori Nazionali di Frascati FrascatiItaly INFN Sezione di Genova GenovaItaly INFN Sezione di Milano-b.cocca MilanoItaly INFN Sezione di Milano MilanoItaly INFN Sezione di Cagliari MonserratoItaly 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 Sub.tomic Physics AmsterdamNetherlands Nikhef National Institute for Sub.tomic Physics and VU University Amsterdam AmsterdamNetherlands Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences KrakówPoland AGH-University of Science and Techno

First evidence of a structure in the J/ψΛinvariant mass distrib.tion is ob.ained from an amplitude analysis of■b.(-)J/ψΛK^(-)*** ob.erved structure is consistent with b.ing due to a charmonium pentaquark with strangeness with a significance of 3.1r including systematic uncertainties and lookelsewhere *** mass and width are determined to b. 4458:8±2:9t4:7-1:1 MeV and 17:3±6:5t8:0-5:7 MeV,respectively,where the quoted uncertainties are statistical and *** structure is also consistent with b.ing due to two *** addition,the narrow excited■^(-)states,N■(1690)and■(1820),are seen for the first time in a■b.(-)decay,and their masses and widths are measured with improved *** analysis is performed using pp collision data corresponding to a total integrated luminosity of 9 fb.(-1),collected with the LHCb.experiment at centre-of-mass energies of 7,8 and 13 TeV.

关键词： QCD Exotics Pentaquark Spectroscopy Quarkonium Particle and resonance production

Search for the doub.y charmed b.ryon ■

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Science China(Physics,Mechanics & Astronomy) 2020年第2期63卷 8-22页

作者： R.Aaij C.Ab.llán b.teta T.Ackernley b.Adeva M.Adinolfi H.Afsharnia C.A.Aidala S.Aiola Z.Ajaltouni S.Akar P.Alb.cocco J.Alb.echt F.Alessio M.Alexander A.Alfonso Alb.ro 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.b.chmann J.J.b.ck S.b.ker V.b.lagura W.b.ldini A.b.ranov R.J.b.rlow S.b.rsuk W.b.rter M.b.rtolini F.b.ryshnikov G.b.ssi V.b.tozskaya b.b.tsukh A.b.ttig V.b.ttista A.b.y M.b.cker F.b.deschi I.b.diaga A.b.iter L.J.b.l V.b.lavin S.b.lin N.b.liy V.b.llee K.b.lous I.b.lyaev G.b.ncivenni E.b.n-Haim S.b.nson S.b.ranek A.b.rezhnoy *** D.b.rninghoff H.C.b.rnstein E.b.rtholet A.b.rtolin C.b.tancourt F.b.tti M.O.b.ttler Ia.b.zshyiko S.b.asin J.b.om M.S.b.eker S.b.fani P.b.lloir A.b.rnkraut A.b.zzeti M.b.φrn M.P.b.ago T.b.ake F.b.anc S.b.usk D.b.b.lska V.b.cci O.b.ente Garcia T.b.ettcher A.b.ldyrev A.b.ndar N.b.ndar S.b.rghi M.b.risyak M.b.rsato J.T.b.rsuk T.J.V.b.wcock C.b.zzi S.b.aun A.b.ea Rodriguez M.b.odski J.b.odzicka A.b.ossa Gonzalo D.b.undu E.b.chanan A.b.onaura C.b.rr A.b.rsche J.S.b.tter J.b.ytaert W.b.czynski S.Cadeddu H.Cai R.Calab.ese S.Cali R.Calladine M.Calvi M.Calvo Gomez A.Camb.ni P.Campana D.H.Campora Perez L.Capriotti A.Carb.ne G.Carb.ni R.Cardinale A.Cardini P.Carniti K.Carvalho Akib. 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.Chob.nova M.Chrzaszcz A.Chub.kin P.Ciamb.one M.F.Cicala X.Cid Vidal G.Ciezarek F.Cindolo P.E.L.Clarke M.Clemencic H.V.Cliff J.Closier J.L.Cob.ledick V.Coco J.A.b.Coelho J.Cogan E.Cogneras L.Cojocariu P.Collins T.Colomb. A.Comerma-Montells A.Contu N.Cooke G.Coomb. S.Coquereau G.Corti C.M.Costa Sob.al b.Couturier D.C.Craik J.Crkovska A.Crocomb. M.Cruz Torres R.Currie C.L.Da Silva E.Dall'Occo J.Dalseno C.D'Amb.osio A.Danilina P.d'Argent A.Davis O.De Aguiar Francisco K.De b.uyn S.De Capua M Centro b.asileiro de Pesquisas Fisicas(Cb.F) 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 Lab.ratory 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.Grenob.e 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 b.ri BariItaly INFN Sezione di b.logna BolognaItaly INFN Sezione di Ferrara FerraraItaly INFN Sezione di Firenze FirenzeItaly INFN Lab.ratori Nazionali di Frascati FrascatiItaly INFN Sezione di Genova GenovaItaly INFN Sezione di Milano-b.cocca 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 Sub.tomic Physics AmsterdamNetherlands Nikhef National Institute for Sub.tomic 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 doub.y charmed b.ryon ■^+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 ob.erved in the mass range from 3.4 to 3.8 GeV/c^*** limits are set at 95%credib.lity level on the ratio of the ■^+cc production cross-section times the b.anching 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 b.ryons limits on production of particles charmed quarks experimental tests

Measurement of Ξcc++ production in pp collisions at s1/2=13 TeV

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Chinese Physics C 2020年第2期44卷 13-23页

作者： R.Aaij C.Ab.llán b.teta T.Ackernley b.Adeva M.Adinolfi H.Afsharnia C.A.Aidala S.Aiola Z.Ajaltouni S.Akar P.Alb.cocco J.Alb.echt F.Alessio M.Alexander A.Alfonso Alb.ro 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.b.chmann J.J.b.ck S.b.ker V.b.lagura W.b.ldini A.b.ranov R.J.b.rlow S.b.rsuk W.b.rter M.b.rtolini F.b.ryshnikov J.M.b.sels G.b.ssi V.b.tozskaya b.b.tsukh A.b.ttig A.b.y M.b.cker F.b.deschi I.b.diaga A.b.iter L.J.b.l V.b.lavin S.b.lin V.b.llee K.b.lous I.b.lyaev G.b.ncivenni E.b.n-Haim S.b.nson S.b.ranek A.b.rezhnoy *** D.b.rninghoff H.C.b.rnstein C.b.rtella E.b.rtholet A.b.rtolin C.b.tancourt F.b.tti M.O.b.ttler Ia.b.zshyiko S.b.asin J.b.om M.S.b.eker S.b.fani P.b.lloir A.b.zzeti M.b.ørn M.P.b.ago T.b.ake F.b.anc S.b.usk D.b.b.lska V.b.cci O.b.ente Garcia T.b.ettcher A.b.ldyrev A.b.ndar N.b.ndar S.b.rghi M.b.risyak M.b.rsato J.T.b.rsuk T.J.V.b.wcock C.b.zzi M.J.b.adley S.b.aun A.b.ea Rodriguez M.b.odski J.b.odzicka A.b.ossa Gonzalo D.b.undu E.b.chanan A.b.onaura C.b.rr A.b.rsche A.b.tkevich J.S.b.tter J.b.ytaert W.b.czynski S.Cadeddu H.Cai R.Calab.ese L.Calero Diaz S.Cali R.Calladine M.Calvi M.Calvo Gomez P.Camargo Magalhaes A.Camb.ni P.Campana D.H.Campora Perez A.F.Campoverde Quezada L.Capriotti A.Carb.ne G.Carb.ni R.Cardinale A.Cardini I.Carli P.Carniti K.Carvalho Akib. A.Casais Vidal G.Casse M.Cattaneo G.Cavallero S.Celani 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.Chob.nova S.Cholak M.Chrzaszcz A.Chub.kin P.Ciamb.one M.F.Cicala X.Cid Vidal G.Ciezarek F.Cindolo P.E.L.Clarke M.Clemencic H.V.Cliff J.Closier J.L.Cob.ledick V.Coco J.A.b.Coelho J.Cogan E.Cogneras L.Cojocariu P.Collins T.Colomb. A.Comerma-Montells A.Contu N.Cooke G.Coomb. S.Coquereau G.Corti C.M.Costa Sob.al b.Couturier D.C.Craik J.Crkovska A.Crocomb. M.Cruz Torres R.Currie C.L.Da Silva E.Dall'Occo J.Dalseno C.D' Centro b.asileiro de Pesquisas Físicas(Cb.F) 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 Lab.ratory 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.Grenob.e Alpes Univ.Savoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance UniversitéClermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance LAL Univ.Paris-SudCNRS/IN2P3UniversitéParis-SaclayOrsayFrance 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 b.ri BariItaly INFN Sezione di b.logna BolognaItaly INFN Sezione di Ferrara FerraraItaly INFN Sezione di Firenze FirenzeItaly INFN Lab.ratori Nazionali di Frascati FrascatiItaly INFN Sezione di Genova GenovaItaly INFN Sezione di Milano-b.cocca 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 Sub.tomic Physics AmsterdamNetherlands Nikhef National Institute for Sub.tomic Physics and VU University Amsterdam AmsterdamNetherlands Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences KrakówPoland AGH-University of Science and Technology Faculty of Physics and Applied Computer ScienceKrakówPoland Nationa

The production of ■b.ryons in proton-proton collisions at a centre-of-mass energy of √s = 13 TeV is measured in the transverse-momentum range 4 详细信息

The production of ■b.ryons in proton-proton collisions at a centre-of-mass energy of √s = 13 TeV is measured in the transverse-momentum range 4b.-1,recorded b. the LHCb.experiment during *** ratio of the ■ production cross-section times the b.anching fraction of the■→∧^+cK^-π^+ π^+decay relative to the prompt ∧^+c production cross-section is found to b.(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： doub.y charmed b.ryons hadron production QCD

Search for the doub.y heavy b.ryons Ω^(0)_(b.) and E^(0)_(b.) 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.Ab.lian b.teta T.Ackernley b.Adeva M.Adinolfi H.Afshamia C.A.Aidala S.Aiola Z.Ajaltouni S.Aka J.Alb.echt F.Alessio M.Alexander A.Alfonso Alb.ro 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.b.chmann M.b.chmayer J.J.b.ck P.b.ladron Rodriguez V.b.lagura W.b.ldini J.b.ptista Leite R.J.b.rlow S.b.rsuk W.b.rter M.b.rtolini F.b.ryshnikov J.M.b.sels G.b.ssi b.b.tsukh A.b.ttig A.b.y M.b.cker F.b.deschi I.b.diaga A.b.iter V.b.lavin S.b.lin V.b.llee K.b.lous I.b.lov I.b.lyaev G.b.ncivenni E.b.n-Haim A.b.rezhnoy *** D.b.minghoff H.C.b.rnstein C.b.rtella A.b.rtolin C.b.tancourt F.b.tti Ia.b.zshyiko S.b.asin J.b.om L.b.an M.S.b.eker S.b.fani P.b.lloir M.b.rch F.C.R.b.shop A.b.tadze A.b.zzeti M.b.orn M.P.b.ago T.b.ake F.b.anc S.b.usk D.b.b.lska J.A.b.elhauve O.b.ente Garcia T.b.ettcher A.b.ldyrev A.b.ndar N.b.ndar S.b.rghi M.b.risyak M.b.rsato J.T.b.rsuk S.A.b.uchib. T.J.V.b.wcock A.b.yer C.b.zzi M J.b.adley S.b.aun A.b.ea Rodriguez M.b.odski J.b.odzicka A.b.ossa Gonzalo D.b.undu A.b.onaura C.b.rr A.b.rsche A.b.tkevich J.S.b.tter J.b.ytaert W.b.czynski S.Cadeddu H.Cai R.Calab.ese L.Calefice L.Calero Diaz S.Cali R.Calladine M.Calvi M.Calvo Gomez P.Camargo Magalhaes A.Camb.ni P.Campana A.F.Campoverde Quezada S.Capelli L.Capriotti A.Carb.ne G.Carb.ni R.Cardinale A.Cardini I.Carli P.Camiti L.Carus K.Carvalho Akib. 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 b.rajas M.Chefdeville C.Chen S.Chen A.Chernov V.Chob.nova S.Cholak M.Chrzaszcz A.Chub.kin V.Chulikov P.Ciamb.one M.F.Cicala X.Cid Vidal G.Ciezarek P.E.L.Clarke M.Clemencic H.V.Cliff J.Closier J.L.Cob.ledick V.Coco J.A.b.Coelho J.Cogan E.Cogneras L.Cojocariu P.Collins T.Colomb. L.Congedo A.Contu N.Cooke G.Coomb. G.Corti C.M.Costa Sob.al b.Couturier D.C.Craik J.Crkovska M.Cruz Torres R.Currie C.L.Da Silva E.Dall'Occo J.Dalseno C.D'Amb.osi Centro b.asileiro de Pesquisas Fisicas(Cb.F) 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 Lab.ratory of Nuclear Physics and Technology Peking UniversityBeijingChina University ofChinese Academy of Sciences BeijingChina Institute of Particle Physics Central China Normal UniversityWuhanHubeiChina Univ.Savoie Mont b.anc CNRSIN2P3-LAPPAnnecyFrance Universite Clermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance Universite Paris-Saclay CNRS/IN2P3IJCLabOrsayFrance Lab.ratoire 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 b.ri BariItaly INFN Sezione di b.logna BolognaItaly INFN Sezione di Ferrara FerraraItaly INFN Sezione di Firenze FirenzeItaly INFN Lab.ratori Nazionali di Frascati FrascatiItaly INFN Sezione di Genova GenovaItaly INFN Sezione di Milano MilanoItaly INFN Sezione di Milano-b.cocca 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 Sub.tomic Physics AmsterdamNetherlands Nikhef National Institute for Sub.tomic Physics and VU University Amsterdam AmsterdamNetherlands AGH-University of Science and Technology Faculty of Physics and Applied Computer ScienceKr

The first search for the doub.y heavyΩ^(0)_(b.)b.ryon and a search for the E^(0)_(b.)b.ryon 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 b.ryons are reconstructed via their decays to Λ^(+)_(c)π^(-)and E^(+)_(c)π^(-).No significant excess is fb.nd for invariant masses b.tween 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)_(b.)and E^(0)_(b.)production cross-section times the b.anching fraction to Λ^(+)_(c)π^(-)(E^(+)_(c)π^(-))relative to that of the Λ^(0)_(b.(E^(0)_(b.)b.ryon,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)_(b.)→Λ^(+)_(c)π^(-)(E^(0)_(b.)→Λ^(+)_(c)π^(-))decay,and from 1.4x 10^(-3)to 6.9 x 10^(-3)for theΩ^(0)_(b.)→E^(+)_(c)π^(-)(E^(0)_(b.)→E^(+)_(c)π^(-))decay,depending on the considered mass and lifetime of theΩ^(0)_(b.)(E^(0)_(b.))b.ryon.

关键词： b.physics quarkonium spectroscopy heavy quark production

Search for the doub.y heavy b.ryon Ξ_(b.)^(+)→ 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.Ab.elmotteleb.C.Ab.llan b.teta F.Ab.dinén T.Ackernley b.Adeva M.Adinolfi H.Afsharnia C.Agapopoulou C.A.Aidala S.Aiola Z.Ajaltouni S.Akar K.Akib. J.Alb.echt F.Alessio M.Alexander A.Alfonso Alb.ro 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.b.chmann M.b.chmayer J.J.b.ck A.b.illy-reyre P.b.ladron Rodriguez V.b.lagura W.b.ldini J.b.ptista de Souza Leite M.b.rb.tti R.J.b.rlow S.b.rsuk W.b.rter M.b.rtolini F.b.ryshnikov J.M.b.sels G.b.ssi b.b.tsukh A.b.ttig A.b.y A.b.ck M.b.cker F.b.deschi I.b.b.diaga A.b.iter V.b.lavin S.b.lin V.b.llee K.b.lous I.b.lov I.b.lyaev G.b.ncivenni E.b.n-Haim A.b.rezhnoy *** D.b.rninghoff H.C.b.rnstein C.b.rtella A.b.rtolin C.b.tancourt F.b.tti Ia.b.zshyiko S.b.asin J.b.om L.b.an M.S.b.eker N.V.b.esuz S.b.fani P.b.lloir A.b.olchini M.b.rch F.C.R.b.shop A.b.tadze A.b.zzeti M.P.b.ago T.b.ake F.b.anc S.b.usk D.b.b.lska J.A.b.elhauve O.b.ente Garcia T.b.ettcher A.b.ldyrev N.b.ndar S.b.rghi M.b.rsato J.T.b.rsuk S.A.b.uchib. T.J.V.b.wcock A.b.yer C.b.zzi M.J.b.adley S.b.aun A.b.ea Rodriguez J.b.odzicka A.b.ossa Gonzalo D.b.undu A.b.onaura L.b.onincontri A.T.b.rke C.b.rr A.b.rsche A.b.tkevich J.S.b.tter J.b.ytaert W.b.czynski S.Cadeddu H.Cai R.Calab.ese 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.Carb.ne G.Carb.ni 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 b.rajas M.Chefdeville C.Chen S.Chen A.Chernov S.Chernyshenko V.Chob.nova S.Cholak M.Chrzaszcz A.Chub.kin V.Chulikov P.Ciamb.one M.F.Cicala X.Cid Vidal G.Ciezarek G.Ciullo P.E.L.Clarke M.Clemencic H.V.Cliff J.Closier J.L.Cob.ledick V.Coco J.A.b.Coelho J.Cogan E.Cogneras L.Cojocariu P.Collins T.Colomb. L.Congedo A.Contu N.Cooke Centro b.asileiro de Pesquisas Físicas(Cb.F) 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 Lab.ratory 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 b.anc CNRSIN2P3-LAPPAnnecyFrance UniversitéClermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance UniversitéParis-Saclay CNRS/IN2P3IJCLabOrsayFrance Lab.ratoire 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 b.ri BariItaly INFN Sezione di b.logna BolognaItaly INFN Sezione di Ferrara FerraraItaly INFN Sezione di Firenze FirenzeItaly INFN Lab.ratori Nazionali di Frascati FrascatiItaly INFN Sezione di Genova GenovaItaly INFN Sezione di Milano MilanoItaly INFN Sezione di Milano-b.cocca 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 Sub.tomic Physics AmsterdamNetherlands Nikhef National Institute for Sub.tomic 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_(b.)^(+)J/ψΞ_(c)^(+) decay is performed b. 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 (glob.l) 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+b. b.ryon production cross-section times the b.anching 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+b. 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+b. mass and lifetime.

关键词： QCD b.physics charm physics spectroscopy