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Study of the production of ∧0/b and -B/0 hadrons in pp collisions and first measurement of the ∧0/b→ J/ψ pK- branching fraction
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作者 R. Aaij B. Adeva +127 位作者 M. Adinolfi A. Affolder Z. Ajaltouni S. Akar J. Albrecht F. Alessio M. Alexander S. Ali G. Alkhazov P. Alvarez Cartelle A.A. Alves Jr S. Amato S. Amerio Y. Amhis L. An L. AnderLini J. Anderson G. Andreassi M. Andreotti J.E. AndrEws R.B. Appleby O. Aquines Gutierrez F. Archilli1 P. d'Argent A. Artamonov M. Artuso E. AslanidEs G. Auriemma M. Baalouch S. Bachmann J.J. Back A. Badalov C. Baesso W. Baldini R.J. B arlow C. Barschel S. Barsuk W. Barter V. Batozskaya V. Battista A. Bay L.Beaucourt J. Beddow F. Bedeschi I. Bediaga L.J. BeL V. Bellee N. Belloli I. Belyaev E. BEn-Haim G. Bencivenni S. Benson J. Benton A. Berezhnoy R. Bernet A. Bertolin M.-O. Bettler M. van Beuzekom A. Bien S. Bifani P. Billoir T. Bird A. Birnkraut A. Bizzeti T. Blake F. Blanc J. Blouw S. Blusk V. Bocci A. Bondar N. Bondar W. Bonivento S. Borghi M. Borsato T.J.V. Bowcock E. BowEn C. Bozzi S. Braun M.Britsch T. Britton J. Brodzicka N.H. Brook E. Buchanan A. Bursche J. Buytaert S. Cadeddu R. Calabrese M. Calvi M. Calvo Gomez P. CamPana D. Campora perez L. Capriotti1 A. Carbone G. Carboni R. cardinale A. Cardini P. Carniti L. Carson K. Carvalho Akiba G. Casse L. Cassina L. CastiLLo Garcia M. Cattaneo Ch. Cauet G. Cavallero R. Cenci M. Charles Ph. CharPentier M. Chefdeville S. Chen S.-F. Cheung N. Chiapolini M. Chrzaszcz X. Cid Vidal G. Ciezarek P.E.L. Clarke M. Clemencic H.V. Cliff J. Closier V. Coco J. Cogan E. CognEras V. Cogoni L. Cojocariu G. Collazuol P. Collins A. Comerma-Montells A. Co 《中国物理C:英文版》 SCIE CAS CSCD 2016年第1期1-16,共16页
The product of the A_b~0(B~0) differential production cross-section and the branching fraction of the decay A_b~0→J/ψpK~-(B~0→J/ψK~*(892)~0) is measured as a function of the beauty hadron transverse momentum,p_T,a... The product of the A_b~0(B~0) differential production cross-section and the branching fraction of the decay A_b~0→J/ψpK~-(B~0→J/ψK~*(892)~0) is measured as a function of the beauty hadron transverse momentum,p_T,and rapidity,y.The kinematic region of the measurements is p_T <20 GeV/c and 2.0<y<4.5.The 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~(1/2)=7 TeV in 2011 and s~(1/2)= 8TeV in 2012.Based on previous LHCb results of the fragmentation fraction ratio,f_∧_b~0/f_d,the branching fraction of the decay ∧_b~0→J/ψpK~- is measured to be B(∧_b~0→J/ψpK~-)=(3.17±0.04±0.07±0.34_(-0.28)~(+0.45)×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/ψK~*(892)~0,and the fourth is due to the knowledge of f_∧_b~0/f_d.The sum of the asymmetries in the production and decay between A_b and A_b~0 is also measured as a function of p_T and y.The previously published branching fraction of A_b~0→J/φpπ~-,relative to that of A_b~0→J/ψpK~-,is updated.The branching fractions of∧_b~0→P_c~+(→J/ψp)K~- are determined. 展开更多
关键词 一次测量 分数 pp 强子 生产 不确定性 分支比 产生截面
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