Measurement of the relative rate of prompt χc0, χc1 and χc2 production at √s=7 TeV

被引：0

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
]}

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
]}

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, LAPP, CNRS, IN2P3, Annecy Le Vieux, France

[5] Univ Blaise Pascal, Clermont Univ, CNRS, IN2P3,LPC, 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] Sez INFN Bari, Bari, Italy

[14] Sez INFN Bologna, Bologna, 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 Padova, Padua, Italy

[22] Sez INFN Pisa, Pisa, 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, Fac Phys & Appl Comp Sci, Krakow, Poland

[27] NCBJ, 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] 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 Natl Inst Subatom Phys, Amsterdam, Netherlands

[42] Vrije Univ Amsterdam, Amsterdam, Netherlands

[43] NSC KIPT, 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

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2013年 / 10期

关键词：

Quarkonium; Hadron-Hadron Scattering; DECAY; PSI;

D O I：

10.1007/JHEP10(2013)115

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：

Prompt production of charmonium chi(c0), chi(c1) and chi(c2) mesons is studied using proton-proton collisions at the LHC at a centre-of-mass energy of root s = 7 TeV. The chi(c) mesons are identi fi ed through their decay to J/psi gamma, with J/psi -> mu(+)mu(-) using photons that converted in the detector. A data sample, corresponding to an integrated luminosity of 1.0 fb(-1) collected by the LHCb detector, is used to measure the relative prompt production rate of chi(c1) and chi(c2) in the rapidity range 2.0 < y < 4.5 as a function of the J/psi transverse momentum from 3 to 20 GeV/c. First evidence for chi(c0) meson production at a high-energy hadron collider is also presented.

引用

页数：20

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