Observation of J/ψ-pair production in pp collisions at √s=7 TeV

被引：163

作者：

Aaij, R. ^{[24
]}

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. ^{[30
]}

Alvarez Cartelle, P. ^{[37
]}

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

Amato, S. ^{[3
]}

Amhis, Y. ^{[39
]}

Anderson, J. ^{[40
]}

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

Aquines Gutierrez, O. ^{[11
]}

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

Arrabito, L.

Artamonov, A. ^{[35
]}

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

Aslanides, E. ^{[7
]}

Auriemma, G. ^{[23
,63
]}

Bachmann, S. ^{[12
]}

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

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

Balagura, V. ^{[1
,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. ^{[24
]}

Bay, A. ^{[39
]}

Bediaga, I. ^{[2
]}

Belous, K. ^{[35
]}

Belyaev, I. ^{[1
,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. ^{[24
]}

Bien, A. ^{[12
]}

Bifani, S. ^{[13
]}

Bizzeti, A. ^{[18
,62
]}

机构：

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

[2] CBPF, 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, LAPP, CNRS IN2P3, 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, CNRS IN2P3, 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 Bologna, Bologna, Italy

[16] Sez INFN Cagliari, Cagliari, Italy

[17] Sez INFN Ferrara, Ferrara, Italy

[18] Sez INFN Firenze, Florence, Italy

[19] INFN Frascati, Lab Nazl, 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] Nikhef Natl Inst Subatom Phys, Amsterdam, Netherlands

[25] Vrije Univ Amsterdam, Amsterdam, Netherlands

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

[27] Fac Phys & Appl Comp Sci, Krakow, Poland

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

[29] Horio Hulubei Natl Inst Phys & Nucl Engn, Bucharest, Romania

[30] PNPI, Gatchina, 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] European Org Nucl Res CERN, Geneva, Switzerland

[39] Ecole Polytech Fed Lausanne, CH-1015 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 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：

PHYSICS LETTERS B | 2012年 / 707卷 / 01期

关键词：

PSI-PSI-PRODUCTION; MESON PRODUCTION; UPSILON;

D O I：

10.1016/j.physletb.2011.12.015

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The production of J/psi pairs in proton-proton collisions at a centre-of-mass energy of 7 TeV has been observed using an integrated luminosity of 37.5 pb(-1) collected with the LHCb detector. The production cross-section for pairs with both J/psi in the rapidity range 2 < y(J/psi) < 4.5 and transverse momentum p(T)(J/psi) < 10 GeV/c is sigma(J/psi J/psi) = 5.1 +/- 1.0 +/- 1.1 nb, where the first uncertainty is statistical and the second systematic. (C) 2011 CERN. Published by Elsevier B.V. All rights reserved.

引用

页码：52 / 59

页数：8

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