Observation of X(3872) production in pp collisions at √s=7 TeV

被引：0

作者：

Aaij, R. ^{[1
]}

Abellan Beteta, C. ^{[35
,70
,71
]}

Adeva, B. ^{[36
]}

Adinolfi, M. ^{[42
]}

Adrover, C. ^{[7
]}

Affolder, A. ^{[48
]}

Ajaltouni, Z. ^{[6
]}

Albrecht, J. ^{[37
]}

Alessio, F. ^{[37
]}

Alexander, M. ^{[47
]}

Alkhazov, G. ^{[28
]}

Alvarez Cartelle, P. ^{[36
]}

Alves, A. A., Jr. ^{[22
]}

Amato, S. ^{[3
]}

Amhis, Y. ^{[38
]}

Anderson, J. ^{[39
]}

Appleby, R. B. ^{[50
]}

Gutierrez, O. Aquines ^{[11
]}

Archilli, F. ^{[18
,37
]}

Arrabito, L. ^{[53
]}

Artamonov, A. ^{[34
]}

Artuso, M. ^{[37
,52
]}

Aslanides, E. ^{[7
]}

Auriemma, G. ^{[22
,69
]}

Bachmann, S. ^{[12
]}

Back, J. J. ^{[44
]}

Bailey, D. S. ^{[50
]}

Balagura, V. ^{[29
,37
]}

Baldini, W. ^{[16
]}

Barlow, R. J. ^{[50
]}

Barschel, C. ^{[37
]}

Barsuk, S. ^{[8
]}

Barter, W. ^{[43
]}

Bates, A. ^{[47
]}

Bauer, C. ^{[11
]}

Bauer, Th. ^{[1
]}

Bay, A. ^{[38
]}

Bediaga, I. ^{[2
]}

Belogurov, S. ^{[29
]}

Belous, K. ^{[37
]}

Belyaev, I. ^{[29
,37
]}

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

Benayoun, M. ^{[9
]}

Bencivenni, G. ^{[18
]}

Benson, S. ^{[46
]}

Benton, J. ^{[42
]}

Bernet, R. ^{[39
]}

Bettler, M. -O. ^{[17
]}

van Beuzekom, M. ^{[1
]}

Bien, A. ^{[12
]}

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,LPC, 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] Heidelberg Univ, Inst Phys, D-6900 Heidelberg, Germany

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

[14] Sez INFN Bari, Bari, Italy

[15] Sez INFN Cagliari, Cagliari, Italy

[16] Sez INFN Ferrara, Ferrara, Italy

[17] Sez INFN Firenze, Florence, Italy

[18] Lab Nazl INFN Frascati, Frascati, Italy

[19] Sez INFN Genova, Genoa, Italy

[20] Sez INFN Milano Bicocca, Milan, Italy

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

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

[23] Vrije Univ, Amsterdam, Netherlands

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

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

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

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

[28] PNPI, Gatchina, Russia

[29] Inst Theoret & Expt Phys, Moscow 117259, Russia

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

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

[32] Novosibirsk State Univ, Novosibirsk 630090, Russia

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

[34] Inst High Energy Phys, Protvino, Russia

[35] Univ Barcelona, Barcelona, Spain

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

[37] CERN, European Org Nucl Res, CH-1211 Geneva 23, Switzerland

[38] Ecole Polytech Fed Lausanne, Lausanne, Switzerland

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

[40] NSC KIPT, Kharkov, Ukraine

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

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

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

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

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

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

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

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

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

[50] Univ Manchester, Sch Phys & Astron, Manchester, Lancs, England

来源：

EUROPEAN PHYSICAL JOURNAL C | 2012年 / 72卷 / 05期

关键词：

D O I：

10.1140/epjc/s10052-012-1972-7

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

Using 34.7 pb(-1) of data collected with the LHCb detector, the inclusive production of the X(3872) meson in pp collisions at root s = 7 TeV is observed for the first time. Candidates are selected in the X(3872) -> J/psi pi(+)pi(-) decay mode, and used to measure sigma(pp -> X(3872) + anything)beta(X(3872) -> J/psi pi(+)pi(-)) = 5.4 +/- 1.3 (stat)+/- 0.8 (syst) nb, where sigma (pp -> X(3872) + anything) is the inclusive production cross section of X(3872) mesons with rapidity in the range 2.5-4.5 and transverse momentum in the range 5-20 GeV/c. In addition the masses of both the X(3872) and psi(2S) mesons, reconstructed in the J/psi pi(+)pi(-) final state, are measured to be m(X(3872)) = 3871.95 +/- 0.48 (stat)+/- 0.12 (syst) MeV/c(2) and m(psi(2S)) = 3686.12 +/- 0.06 (stat)+/- 0.10 (syst) MeV/c(2).

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