Measurement of the CP-Violating Phase φs in the Decay Bs0 → J/ψφ

被引：90

作者：

Aaij, R. ^{[1
]}

Abellan Beteta, C. ^{[36
,58
]}

Adeva, B. ^{[37
]}

Adinolfi, M. ^{[43
]}

Adrover, C. ^{[7
]}

Affolder, A. ^{[49
]}

Ajaltouni, Z. ^{[6
]}

Albrecht, J. ^{[38
]}

Alessio, F. ^{[38
]}

Alexander, M. ^{[48
]}

Alkhazov, G. ^{[29
]}

Alvarez Cartelle, P. ^{[37
]}

Alves, A. A., Jr. ^{[23
]}

Amato, S. ^{[3
]}

Amhis, Y. ^{[39
]}

Anderson, J. ^{[40
]}

Appleby, R. B. ^{[51
]}

Gutierrez, O. Aquines ^{[11
]}

Archilli, F. ^{[19
,38
]}

Arrabito, L. ^{[54
]}

Artamonov, A. ^{[35
]}

Artuso, M. ^{[38
,53
]}

Aslanides, E. ^{[7
]}

Auriemma, G. ^{[23
,59
]}

Bachmann, S. ^{[13
]}

Back, J. J. ^{[45
]}

Bailey, D. S. ^{[51
]}

Balagura, V. ^{[30
,38
]}

Baldini, W. ^{[17
]}

Barlow, R. J. ^{[51
]}

Barschel, C. ^{[38
]}

Barsuk, S. ^{[8
]}

Barter, W. ^{[44
]}

Bates, A. ^{[48
]}

Bauer, C. ^{[11
]}

Bauer, Th. ^{[1
]}

Bay, A. ^{[39
]}

Bediaga, I. ^{[2
]}

Belogurov, S. ^{[30
]}

Belous, K. ^{[35
]}

Belyaev, I. ^{[30
,38
]}

Ben-Haim, E. ^{[9
]}

Benayoun, M. ^{[9
]}

Bencivenni, G. ^{[19
]}

Benson, S. ^{[47
]}

Benton, J. ^{[43
]}

Bernet, R. ^{[40
]}

Bettler, M-O ^{[18
]}

van Beuzekom, M. ^{[1
]}

Bien, A. ^{[13
]}

机构：

[1] Nikhef Natl Inst Subatom Phys, Amsterdam, Netherlands

[2] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil

[3] Univ Fed Rio de Janeiro, Rio De Janeiro, Brazil

[4] Tsinghua Univ, Ctr High Energy Phys, Beijing 100084, Peoples R China

[5] Univ Savoie, CNRS, IN2P3, LAPP, Annecy Le Vieux, France

[6] Univ Blaise Pascal, Clermont Univ, CNRS, IN2P3, Clermont Ferrand, France

[7] Aix Marseille Univ, CPPM, CNRS, IN2P3, Marseille, France

[8] Univ Paris 11, CNRS, IN2P3, LAL, F-91405 Orsay, France

[9] Univ Paris Diderot, Univ Paris 06, IN2P3, CNRS,LPNHE, Paris, France

[10] Tech Univ Dortmund, Fak Phys, Dortmund, Germany

[11] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany

[12] Univ Coll Dublin, Sch Phys, Dublin 2, Ireland

[13] Heidelberg Univ, Inst Phys, D-6900 Heidelberg, Germany

[14] Sez INFN Bari, Bari, Italy

[15] Sez INFN Bologna, Bologna, Italy

[16] Sez INFN Cagliari, Cagliari, Italy

[17] Sez INFN Ferrara, Ferrara, Italy

[18] Sez INFN Firenze, Florence, Italy

[19] Lab Nazl INFN Frascati, Frascati, Italy

[20] Sez INFN Genova, Genoa, Italy

[21] Sez INFN Milano Bicocca, Milan, Italy

[22] Sez INFN Roma Tor Vergata, Rome, Italy

[23] Sez INFN Roma La Sapienza, Rome, Italy

[24] Vrije Univ Amsterdam, Amsterdam, Netherlands

[25] Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Krakow, Poland

[26] AGH Univ Sci & Technol, Krakow, Poland

[27] Soltan Inst Nucl Studies, PL-00681 Warsaw, Poland

[28] Horia Hulubei Natl Inst Phys & Nucl Engn, Bucharest, Romania

[29] Petersburg Nucl Phys Inst PNPI, Gatchina, Russia

[30] Inst Theoret & Expt Phys ITEP, Moscow, Russia

[31] Moscow State Univ SINP MSU, Inst Nucl Phys, Moscow, Russia

[32] Russian Acad Sci INR RAN, Inst Nucl Res, Moscow, Russia

[33] Novosibirsk State Univ, Novosibirsk 630090, Russia

[34] Budker Inst Nucl Phys SB RAS, Novosibirsk, Russia

[35] Inst High Energy Phys IHEP, Protvino, Russia

[36] Univ Barcelona, Barcelona, Spain

[37] Univ Santiago de Compostela, Santiago De Compostela, Spain

[38] European Org Nucl Res CERN, Geneva, Switzerland

[39] Ecole Polytech Fed Lausanne EPFL, Lausanne, Switzerland

[40] Univ Zurich, Inst Phys, Zurich, Switzerland

[41] NSC Kharkiv Inst Phys & Technol NSC KIPT, Kharkov, Ukraine

[42] Natl Acad Sci KINR, Inst Nucl Res, Kiev, Ukraine

[43] Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England

[44] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[45] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

[46] STFC Rutherford Appleton Lab, Didcot, Oxon, England

[47] Univ Edinburgh, Sch Phys & Astron, Edinburgh, Midlothian, Scotland

[48] Univ Glasgow, Sch Phys & Astron, Glasgow, Lanark, Scotland

[49] Univ Liverpool, Oliver Lodge Lab, Liverpool L69 3BX, Merseyside, England

[50] Univ London Imperial Coll Sci Technol & Med, London, England

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 10期

关键词：

Atomic physics;

D O I：

10.1103/PhysRevLett.108.101803

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a measurement of the time-dependent CP-violating asymmetry in B-s(0) -> J/psi phi decays, using data collected with the LHCb detector at the LHC. The decay time distribution of B-s(0) -> J/psi phi is characterized by the decay widths Gamma(H) and Gamma(L) of the heavy and light mass eigenstates, respectively, of the B-s(0) - (B) over bar (0)(s) system and by a CP-violating phase phi(s). In a sample of about 8500 B-s(0) -> J/psi phi events isolated from 0.37 fb(-1) of pp collisions at root s = 7 TeV, we measure phi(s) = 0.15 +/- 0.18(stat) +/- 0.06(syst) rad. We also find an average B-s(0) decay width Gamma(s) (Gamma(L) + Gamma(H))/2 = 0.657 +/- 0.009(stat) +/- 0.008(syst) ps(-1) and a decay width difference Delta Gamma(s) Gamma(L) - Gamma(H) = 0.123 +/- 0.029(stat) +/- 0.011(syst) ps(-1). Our measurement is insensitive to the transformation (phi(s), Delta Gamma(s)) bar right arrow (pi - phi(s), - Delta Gamma(s)).

引用

页数：8

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