Studies of the decays B+ → p(p)over-barph+ and observation of B+ → (Λ)over-bar(1520)p

被引:14
作者
Aaij, R. [41 ]
Adeva, B. [37 ]
Adinolfi, M. [46 ]
Adrover, C. [6 ]
Affolder, A. [52 ]
Ajaltouni, Z. [5 ]
Albrecht, J. [9 ]
Alessio, F. [38 ]
Alexander, M. [51 ]
Ali, S. [41 ]
Alkhazov, G. [29 ]
Alvarez Cartelle, P. [37 ]
Alves, A. A., Jr. [24 ,38 ]
Amato, S. [2 ]
Amerio, S. [21 ]
Amhis, Y. [7 ]
Anderlini, L. [17 ,68 ]
Anderson, J. [40 ]
Andreassen, R. [57 ]
Andrews, J. E. [58 ]
Appleby, R. B. [54 ]
Gutierrez, O. Aquines [10 ]
Archilli, F. [18 ]
Artamonov, A. [35 ]
Artuso, M. [59 ]
Aslanides, E. [6 ]
Auriemma, G. [24 ,75 ]
Baalouch, M. [5 ]
Bachmann, S. [11 ]
Back, J. J. [48 ]
Baesso, C. [60 ]
Balagura, V. [30 ]
Baldini, W. [16 ]
Barlow, R. J. [54 ]
Barschel, C. [38 ]
Barsuk, S. [7 ]
Barter, W. [47 ]
Bauer, Th. [41 ]
Bay, A. [39 ]
Beddow, J. [51 ]
Bedeschi, F. [22 ]
Bediaga, I. [1 ]
Belogurov, S. [30 ]
Belous, K. [35 ]
Belyaev, I. [30 ]
Ben-Haim, E. [8 ]
Bencivenni, G. [18 ]
Benson, S. [50 ]
Benton, J. [46 ]
Berezhnoy, A. [31 ]
机构
[1] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil
[2] Univ Fed Rio de Janeiro, Rio De Janeiro, Brazil
[3] Tsinghua Univ, Ctr High Energy Phys, Beijing 100084, Peoples R China
[4] Univ Savoie, CNRS, IN2P3, LAPP, Annecy Le Vieux, France
[5] Univ Clermont Ferrand 2, Univ Blaise Pascal, CNRS, IN2P3, Clermont Ferrand, France
[6] Aix Marseille Univ, CPPM, CNRS, IN2P3, Marseille, France
[7] Univ Paris 11, CNRS, LAL, IN2P3, F-91405 Orsay, France
[8] Univ Paris Diderot, Univ Paris 06, LPNHE, CNRS,IN2P3, Paris, France
[9] Tech Univ Dortmund, Fak Phys, Dortmund, Germany
[10] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany
[11] Heidelberg Univ, Inst Phys, Heidelberg, Germany
[12] Univ Coll Dublin, Sch Phys, Dublin 2, Ireland
[13] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy
[14] Ist Nazl Fis Nucl, Sez Bologna, I-40126 Bologna, Italy
[15] Ist Nazl Fis Nucl, Sez Cagliari, Cagliari, Italy
[16] Ist Nazl Fis Nucl, Sez Ferrara, Ferrara, Italy
[17] Ist Nazl Fis Nucl, Sez Firenze, I-50125 Florence, Italy
[18] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy
[19] Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy
[20] Ist Nazl Fis Nucl, Sez Milano Bicocca, I-20133 Milan, Italy
[21] Ist Nazl Fis Nucl, Sez Padova, Padua, Italy
[22] Ist Nazl Fis Nucl, Sez Pisa, Pisa, Italy
[23] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, Rome, Italy
[24] Ist Nazl Fis Nucl, Sez Roma La Sapienza, Rome, Italy
[25] Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Krakow, Poland
[26] AGH Univ Sci & Technol, Fac Phys & Appl Comp Sci, Krakow, Poland
[27] Natl Ctr Nucl Res NCBJ, Warsaw, Poland
[28] Horia Hulubei Natl Inst Phys & Nucl Engn, Bucharest, Romania
[29] Petersburg Nucl Phys Inst, Gatchina, Russia
[30] Inst Theoret & Expt Phys, Moscow 117259, Russia
[31] Moscow State Univ SINP MSU, Inst Nucl Phys, Moscow, Russia
[32] Russian Acad Sci INR RAN, Inst Nucl Res, Moscow, Russia
[33] Budker Inst Nucl Phys SB RAS, Novosibirsk, Russia
[34] Novosibirsk State Univ, Novosibirsk 630090, Russia
[35] Inst High Energy Phys, Protvino, Russia
[36] Univ Barcelona, Barcelona, Spain
[37] Univ Santiago de Compostela, Santiago De Compostela, Spain
[38] CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland
[39] Ecole Polytech Fed Lausanne, Lausanne, Switzerland
[40] Univ Zurich, Inst Phys, Zurich, Switzerland
[41] NIKHEF H, Natl Inst Subat Phys, NL-1009 DB Amsterdam, Netherlands
[42] Vrije Univ Amsterdam, Amsterdam, Netherlands
[43] NSC Kharkiv Inst Phys & Technol, Kharkov, Ukraine
[44] Natl Acad Sci KINR, Inst Nucl Res, Kiev, Ukraine
[45] Univ Birmingham, Birmingham, W Midlands, England
[46] Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England
[47] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
[48] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England
[49] STFC Rutherford Appleton Lab, Didcot, Oxon, England
[50] Univ Edinburgh, Sch Phys & Astron, Edinburgh, Midlothian, Scotland
关键词
TOOL;
D O I
10.1103/PhysRevD.88.052015
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Dynamics and direct CP violation in three-body charmless decays of charged B mesons to a proton, an antiproton and a light meson (pion or kaon) are studied using data, corresponding to an integrated luminosity of 1:0 fb(-1), llected by the LHCb experiment in pp collisions at a center-of-mass energy of 7 TeV. Production spectra are determined as a function of Dalitz-plot and helicity variables. The forwardbackward asymmetry of the light meson in the p (p) over bar rest frame is measured. No significant CP asymmetry in B+ -> p (p) over barK(+) decay is found in any region of the Dalitz plane. We present the first observation of the decay B+ -> (Lambda) over bar (1520)(-> K+(p) over bar )p near the K+(p) over bar threshold and measure B(B+ -> (Lambda) over bar (1520)p) = (3.9(-0.9)(+1.0)(stat) +/- 0.1 (syst) +/- 0.3 (BF)) x 10(-7), where BF denotes the uncertainty on secondary branching fractions.
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