First Observation of the Decay Bc+→J/ψπ+π-π+

被引：56

作者：

Aaij, R. ^{[1
]}

Abellan Beteta, C. ^{[36
,70
,71
]}

Adeva, B. ^{[37
]}

Adinolfi, M. ^{[44
]}

Adrover, C. ^{[8
]}

Affolder, A. ^{[50
]}

Ajaltouni, Z. ^{[7
]}

Albrecht, J. ^{[38
]}

Alessio, F. ^{[38
]}

Alexander, M. ^{[49
]}

Ali, S. ^{[1
]}

Alkhazov, G. ^{[29
]}

Alvarez Cartelle, P. ^{[37
]}

Alves, A. A., Jr. ^{[24
]}

Amato, S. ^{[4
]}

Amhis, Y. ^{[39
]}

Anderson, J. ^{[40
]}

Appleby, R. B. ^{[52
]}

Gutierrez, O. Aquines ^{[12
]}

Archilli, F. ^{[20
,38
]}

Artamonov, A. ^{[35
]}

Artuso, M. ^{[38
,54
]}

Aslanides, E. ^{[8
]}

Auriemma, G. ^{[24
,69
]}

Bachmann, S. ^{[13
]}

Back, J. J. ^{[46
]}

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

Baldini, W. ^{[18
]}

Barlow, R. J. ^{[52
]}

Barschel, C. ^{[38
]}

Barsuk, S. ^{[9
]}

Barter, W. ^{[45
]}

Bates, A. ^{[49
]}

Bauer, C. ^{[12
]}

Bauer, Th. ^{[1
]}

Bay, A. ^{[39
]}

Bediaga, I. ^{[3
]}

Belogurov, S. ^{[30
]}

Belous, K. ^{[35
]}

Belyaev, I. ^{[30
]}

Ben-Haim, E. ^{[10
]}

Benayoun, M. ^{[10
]}

Bencivenni, G. ^{[20
]}

Benson, S. ^{[48
]}

Benton, J. ^{[44
]}

Bernet, R. ^{[40
]}

Bettler, M. -O. ^{[19
]}

van Beuzekom, M. ^{[1
]}

Bien, A. ^{[13
]}

Bifani, S. ^{[14
]}

机构：

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

[2] Vrije Univ Amsterdam, Amsterdam, Netherlands

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

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

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

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

[7] Univ Blaise Pascal, Clermont Univ, CNRS IN2P3, LPC, Clermont Ferrand, France

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

[9] Univ Paris 11, LAL, CNRS IN2P3, Orsay, France

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

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

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

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

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

[15] Sez INFN Bari, Bari, Italy

[16] Sez INFN Bologna, Bologna, Italy

[17] Sez INFN Cagliari, Cagliari, Italy

[18] Sez INFN Ferrara, Ferrara, Italy

[19] Sez INFN Firenze, Florence, Italy

[20] INFN Frascati, Lab Nazl, Frascati, Italy

[21] Sez INFN Genova, Genoa, Italy

[22] Sez INFN Milano Bicocca, Milan, Italy

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

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

[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] PNPI, 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] Novosibirsk State Univ, Novosibirsk 630090, Russia

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

[35] Inst High Energy Phys, 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, Lausanne, Switzerland

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

[41] NSC KIPT, Kharkov, Ukraine

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

[43] Univ Birmingham, Birmingham, W Midlands, England

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

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

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

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

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

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

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

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 25期

关键词：

B-C MESON; HADRONIC PRODUCTION; GENERATOR;

D O I：

10.1103/PhysRevLett.108.251802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The decay Bc(+) -> J/psi pi(+) pi(-) pi(+) is observed for the first time, using 0.8 fb(-1) of pp collisions at root s = 7 TeV collected by the LHCb experiment. The ratio of branching fractions B(B-c(+) -> J/psi pi(+) pi(-) pi(+))/B(B-c(+) -> J/psi pi(+)) is measured to be 2.41 +/- 0.30 +/- 0.33, where the first uncertainty is statistical and the second is systematic. The result is in agreement with theoretical predictions.

引用

页数：7

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