Study of the production of Λ_b^0 band ~0 hadrons in pp collisions and first measurement of the Λ_b^0→J/ψpK^- branching fraction

作     者：O.Kochebina M.Kolpin I.Komarov R.F.Koopman P.Koppenburg M.Kozeiha L.Kravchuk K.Kreplin M.Kreps G.Krocker P.Krokovny F.Kruse W.Krzemien W.Kucewicz M.Kucharczyk V.Kudryavtsev A.K.Kuonen K.Kurek T.Kvaratskheliya D.Lacarrere G.Lafferty A.Lai D.Lambert G.Lanffanchi C.Langenbruch B.Langhans T.Latham C.Lazzeroni R.Le Gac J.van Leerdam J.-P.Lees R.Lefevre A.Leflat J.Lefrancois E.Lemos Cid O.Leroy T.Lesiak B.Leverington Y.Li T.Likhomanenko M.Liles R.Lindner C.Linn F.Lionetto B.Liu X.Liu D.Loh I.Longstaff J.H.Lopes D.Lucchesi M.Lucio Martinez H.Luo A.Lupato E.Luppi O.Lupton A.Lusiani F.Machefert F.Maciuc O.Maev K.Maguire S.Malde A.Malinin G.Manca G.Mancinelli P.Manning A.Mapelli J.Maratas J.F.Marchand U.Marconi C.Marin Benito P.Marino J.Marks G.Martellottil M.Martin M.Martinelli D.Martinez Santos F.Martinez Vidal D.Martins Tostes A.Massafferri R.Matev A.Mathad Z.Mathe C.Matteuzzi A.Mauri B.Maurin A.Mazurov M.McCann J.McCarthy A.McNab R.McNulty B.Meadows F.Meier M.Meissner D.Melnychuk M.Merk E Michielin D.A.Milanes M.-N.Minard D.S.Mitzel J.Molina Rodrigue I.A.Monroy S.Monteil M.Morandin P.Morawski A.Morda M.J.Morello J.Moron A.B.Morris R.Mountain F.Muheim D.Miiller J.Muller K.Muller V.Muller M.Mussini B.Muster P.Naik T.Nakada R.Nandakumar A.Nandi I.Nasteva M.Needham N.Neri S.Neubert N.Neufeld M.Neuner A.D.Nguyen T.D.Nguyen C.Nguyen-Mau V.Niess R.Niet N.Nikitin T.Nikodem D.Ninci A.Novoselov D.P.O'Hanlon A.Oblakowska-Mucha V.Obraztsov S.Ogilvy O.Okhrimenko R.Oldeman C.J.G.Onderwater B.Osorio Rodrigues J.M.Otalora Goicochea A.Otto P.Owen A.Oyanguren A.Palano F.Palombo M.Palutan J.Panman A.Papanestis M.Pappagallo L.L.Pappalardo C.Pappenheimer C.Parkes G.Passaleva G.D.Patel M.Patel C.Patrignani A.Pearce A.Pellegrino G.Penso M.Pepe Altarelli S.Perazzini P.Perret L.Pescatore K.Petridis A.Petrolini M.Petruzzo E.Picatoste Olloqui B.Pietrzyk T:.Pilar D.Pinci A.Pistone A.Piucci S.Playfer M.Plo Casasus T.Poikela F.Polci A.Poluektov I.Polyakov E.Polycarpo A.Popov D.Popov B.Popovici C.Potterat E.Price J.D.Price J.Prisciandaro A.Pritchard C.Prouve V.Pugatch A.Puig Navarro G.Punzi W.Qian R.Quagliani B.Rachwal J.H.Rademacker M.Rama M.S.Rangel I.Raniuk N.Rauschmayr G.Raven F.Redi S.Reichert M.M.Reid A.C.dos Reis S.Ricciardi S.Richards M.Rihl K.Rinnert V.Rives Molina P.Robbe A.B.Rodrigues E.Rodrigues J.A.Rodriguez Lopez P.Rodriguez Perez S.Roiser V.Romanovsky A.Romero Vidalt J.W.R onayne M.Rotondo J.Rouvinet T.Ruf P.Ruiz Valls J.J.Saborido Silva N.Sagidova P.Sail B.Saitta V.Salustino Guimaraes C.Sanchez Mayordomo B.Sanmartin Sedes R.Santacesaria C.Santamarina Rios M.Santimaria E.Santovetti A.Sarti C.Satriano A.Satta D.M.Saunders D.Savrina M.Schiller H.Schindler M.Schlupp M.Schmelling T.Schmelzer B.Schmidt O.Schneider A.Schopper M.Schubiger M.-H.Schune R.Schwemmer B.Sciascia A.Sciubba A.Semennikov N.Serra J.Serrano L.Sestini P.Seyfert M.Shapkin I.Shapoval Y.Shcheglov T.Shears L.Shekhtman V.Shevchenko A.Shires B.G.Siddi R.Silva Coutinho L.Silva de Oliveira G.Simi M.Sirendi N.Skidmore T.Skwarnicki E.Smith E.Smith I.T.Smith J.Smith M.Smith H.Snoek M.D.Sokoloff F.J.P.Soler F.Soomro D.Souza B.Souza De Paula B.Spaan P.Spradlin S.Sridharan F.Stagni M.Stahl S.Stahl S.Stefkova O.Steinkamp O.Stenyakin S.Stevenson S.Stoica S.Stone B.Storaci S.Stracka M.Straticiuc U.Straumann L.Sun W.Sutcliffe K.Swientek S.Swientek V.Syropoulos M.Szczekowski P.Szczypka T.Szumlak S.T'Jampens A.Tayduganov T.Tekampe M.T eklishyn G.Teilarini F.Teubert C.Thomas E.Thomas J.van Tilburg V.Tisserand M.Tobin J.Todd S.Tolk L.Tomassetti D.Tonelli S.Topp-Joergensen N.Torr E.Tournefier S.Tourneur K.Trabelsi M.T.Tran M.Tresch A.Trisovic A.Tsaregorodtsev P.Tsopelas N.Tuning A.Ukleja A.Ustyuzhanin U.Uwer C.Vacca V.Vagnonit G.Valentit A.Vallier R.Vazquez Gomez P.Vazquez Regueiro C.Vazquez Sierra S.Vecchi J.J.Velthuis M.Veltri G.Veneziano M.Vesterinen B.Viaud D.Vieira M.Vieites Diaz X.Vitasis-Cardona V.Volkov A.Vollhardt D.Volyanskyy D.Voong A.Vorobyev V.Vorobyev C.Voβ J.A.de Vries R.Waldi C.Wallace R.Wallace J.Walsh S.Wandernoth J.Wang D.R.Ward N.K.Watson D.Websdale A.Weiden M.Whitehead G.Wilkinson M.Wilkinson M.Williams M.P.Williams T.Williams F.F.Wilson J.Wimberley J.Wishahi W.Wislicki M.Witek G.Wormser S.A.Wotton S.Wright K.Wyllie Y.Xie Z.Xu Z.Yang J.Yu X.Yuan O.Yushchenko M.Zangoli M.Zavertyaev L.Zhang Y.Zhang A.Zhelezov A.Zhokhov L.Zhong S.Zucchelli 

作者机构：Centro Brasileiro de Pesquisas Ffsicas(CBPF)Rio de JaneiroBrazil Universidade Federal do Rio de Janeiro(UFRJ)Rio de JaneiroBrazil Center for High Energy PhysicsTsinghua UniversityBeijingChina LAPPUniversite Savoie Mont-BlancCNRS/IN2P3Annecy-Le-VieuxFrance Clermont UniversiteUniversite Blaise PascalCNRS/IN2P3LPCclermont-FerrandFrance CPPMAix-Marseille UniversitYCNRS/IN2P3MarseilleFrance LALUniversite Paris-SudCNRS/IN2P3OrsayFrance LPNHEUniversite Pierre et Marie CurieUniversite Paris DiderotCNRS/IN2P3ParisFrance Fakultat PhysikTechnische Universitat DortmundDortmundGermany Max-Planck-lnstitut fur Kernphysik(MPIK)HeidelbergGermany Physikalisches InstitutRuprecht-Karls-Universitat HeidelbergHeidelbergGermany School of PhysicsUniversity College DublinDublinIreland Sezione INFN di BariBariItaly Sezione INFN di BolognaBolognaItaly Sezione INFN di CagliariCagliariItaly Sezione INFN di FerraraFerraraItaly Sezione INFN di FirenzeFirenzeItaly Laboratori Nazionali dell'INFN di PrascatiFrascatiItaly Sezione INFN di GenovaGenovaItaly Sezione INFN di Milnno BicoccaMilunoItaly Sezione INFN di MilanoMilanoItaly Sezione INFN di PadovaPadovaItaly Sezione INFN di PisaPisaItaly Sezione INFN di Roma Tor VergataRomaItaly Sezione INFN di Roma La SapienzaRomaItaly Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of SciencesKrak6wPoland AGH-University of Science and TechnologyFaculty of Physics and Applied Computer ScienceKrakowPoland National Center for Nuclear Research(NCBJ)WarsawPoland Horia Hulubei National Institute of Physics and Nuclear EngineeringBucharest-MagureleRomania Petersburg Nuclear Physics Institute(PNPI)GatchinaRussia Institute of Theoretical and Experimental Physics(ITEP)MoscowRussia Institute of Nuclear PhysicsMoscow State University(SINP MSU)MoscowRussia Institute for Nuclear Research of the Russian Academy of Sciences(INR RAN)MoscowRussia Budker Institute of Nuclear Physics(SB RAS)and Novosibirsk State UniversityNovosibirskRussia Institute for High Energy Physics(IHEP)ProtvinoRussia Universitat de BarcelonaBarcelonaSpain Universidad de Santiago de CompostelaSantiago de CompostelaSpain European Organization for Nuclear Research(CERN)GenevaSwitzerland Ecole Polytechnique Federale de Lausanne(EPFL)LausanneSwitzerland Physik-InstitutUniversitat ZiirichZiirichSwitzerland Nikhef National Institute for Subatomic PhysicsAmsterdamThe Netherlands Nikhef National Institute for Subatomic Physics and VU University AmsterdamAmsterdamThe Netherlands NSC Kharkiv Institute of Physics and Technology(NSC KIPT)KharkivUkraine Institute for Nuclear Research of the National Academy of Sciences(KINR)KyivUkraine University of BirminghamBirminghamUnited Kingdom H.H.Wills Physics LaboratoryUniversity of BristolBristolUnited Kingdom Cavendish LaboratoryUniversity of CambridgeCambridgeUnited Kingdom Department of PhysicsUniversity of WarwickCoventryUnited Kingdom STFC Rutherford Appleton LaboratoryDidcotUnited Kingdom School of Physics and AstronomyUniversity of EdinburghEdinburghUnited Kingdom School of Physics and AstronomyUniversity of GlasgowGlasgowUnited Kingdom Oliver Lodge LaboratoryUniversity of LiverpoolLiverpoolUnited Kingdom Imperial College LondonLondonUnited Kingdom School of Physics and AstronomyUniversity of ManchesterManchesterUnited Kingdom Department of PhysicsUniversity of OxfordOxfordUnited Kingdom Massachusetts Institute of TechnologyCambridgeMAUnited States University of CincinnatiCincinnatiOHUnited States University of MarylandCollege ParkMDUnited States Syracuse UniversitySyracuseNYUnited States Pontiflcia Universidade católica do Rio de Janeiro(PUC-Rio)Rio de JaneiroBrazil Institute of Particle PhysicsCentral China Normal UniversityWuhanHubeil China Departamento de FisicaUniversidad Nacional de ColombiaBogotaColombia Institut fur PhysikUniversitat RostockRostockGermany National Research Centre Kurchatov InstituteMoscowRussia Yandex School of Data AnalysisMoscowRussia Instituto de Fisica Corpuscular(IFIC)Universitat de Valencia-CSICValenciaSpain Van Swinderen InstituteUniversity of GroningenGroningenThe Netherlands Universidade Federal do Trigngulo Mineiro(UFTM)Uberaba-MGBrazil P.N.Lebedev Physical InstituteRussian Academy of Science(LPI RAS)MoscowRussia Universita di BariBariItaly Universita di BolognaBolognaItaly Universita di CagliariCagliariItaly Universita di FerraraFerraraItaly Universita di UrbinoUrbinoItaly Universita di Modena e Reggio EmiliaModenaItaly Universita di GenovaGenovaItaly Universita di Milano BicoccaMilanoItaly Universita di Roma Tor VergataRomaItaly Universita di Roma La SapienzaRomaItaly Universita della BasilicataPotenzaItaly AGH-University of Science and TechnologyFaculty of Computer ScienceElectronics and TelecommunicationsKrak6wPoland LIFAELSLa SalleUniversitat Ramon LlullBarcelonaSpain Hanoi University of ScienceHanoiViet Nam Universita di PadovaPadovaItaly Universita di PisaPisaItaly Scuola Normale SuperiorePisaItaly Universita degli Studi di MilanoMilanoItaly 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2016年第40卷第1期

页      面：1-16页

核心收录：

学科分类：080802[工学-电力系统及其自动化] 0808[工学-电气工程] 07[理学] 08[工学] 0712[理学-科学技术史(分学科，可授理学、工学、农学、医学学位)] 

基　　金：Supported by CERN and national agencies:CAPES,CNPq,FAPERJ and FINEP(Brazil) NSFC(China) CNRS/IN2P3(France) BMBF,DFG,HGF and MPG(Germany) INFN(Italy) FOM and NWO(The Netherlands) MNi SW and NCN(Poland) MEN/IFA(Romania) Min ES and FANO(Russia) Min ECo(Spain) SNSF and SER(Switzerland) NASU(Ukraine) STFC(United Kingdom) NSF(USA) supported by IN2P3(France),KIT and BMBF(Germany),INFN(Italy),NWO SURF(The Netherlands),PIC(Spain),Grid PP(United Kingdom) support from EPLANET,Marie Sk lodowska-Curie Actions ERC(European Union),Conseil général de Haute-Savoie,Labex ENIGMASS and OCEVU,Région Auvergne(France),RFBR(Russia),Xunta Gal GENCAT(Spain),Royal Society and Royal Commission for the Exhibition of 1851(United Kingdom) 

主　　题：production cross-section branching fraction b hadrons proton-proton collisions 

摘      要：The product of the ∧0/b （-B/0） differential production cross-section and the branching fraction of the decay ∧0/b→ J/ψ pK-（-B/0→ J/ψ-K＊（892）0）is measured as a function of the beauty hadron transverse momentum, PT, and rapidity, y. The kinematic region of the measurements is pT〈20 GeV/c and 2.0 〈g〈*** measurements use a data sample corresponding to an integrated luminosity of 3fb-1 collected by the LHCb detector in pp collisions at centre-of-mass energies √s=7 TeV in 2011 and √s=8 TeV in 2012. Based on previous LHCb results of the fragmentation fraction ratio,f∧0/b/fd,the branching fraction of the decay ∧0/b→ J/ψ pK-is measured to be B（∧0/b→ J/ψ pK-）=（3.17±0.04±0.07±0.34＋0.45/-0.28）×10-4,where the first uncertainty is statistical, the second is systematic, the third is due to the uncertainty on the branching fraction of the decay -B/0 →J/ψ-K＊（892）0,and the fourth is due to the knowledge of f∧0/b/*** sum of the asymmetries in the production and decay between ∧0/b and ∧0/bis also measured as a function of PT and *** previously published branching fraction of ∧0/b→ J/ψ pπ-,relative to that of ∧0/b→ J/ψ pK-,is updated. The branching fractions of ∧0/b→P＋c（→ J/ψp）K-are determined.