Measurement of the Polarization of the Υ(1S) and Υ(2S) States in pp Collisions at s=1.96 TeV

被引：53

作者：

Abazov, V. M. ^{[1
]}

Abbott, B. ^{[85
]}

Abolins, M. ^{[75
]}

Acharya, B. S. ^{[36
]}

Adams, M. ^{[61
]}

Adams, T. ^{[59
]}

Aguilo, E. ^{[7
,8
,9
,10
]}

Ahn, S. H. ^{[38
]}

Ahsan, M. ^{[69
]}

Alexeev, G. D. ^{[1
]}

Alkhazov, G. ^{[47
]}

Alton, A. ^{[74
]}

Alverson, G. ^{[73
]}

Alves, G. A. ^{[3
]}

Anastasoaie, M. ^{[43
]}

Ancu, L. S. ^{[43
]}

Andeen, T. ^{[63
]}

Anderson, S. ^{[55
]}

Andrieu, B. ^{[21
,22
]}

Anzelc, M. S. ^{[63
]}

Aoki, M. ^{[60
]}

Arnoud, Y. ^{[18
]}

Arov, M. ^{[70
]}

Arthaud, M. ^{[23
]}

Askew, A. ^{[59
]}

Asman, B. ^{[48
,49
,50
,51
]}

Jesus, A. C. S. Assis ^{[4
]}

Atramentov, O. ^{[59
]}

Avila, C. ^{[12
]}

Badaud, F. ^{[17
]}

Baden, A. ^{[71
]}

Bagby, L. ^{[60
]}

Baldin, B. ^{[60
]}

Bandurin, D. V. ^{[69
]}

Banerjee, P. ^{[36
]}

Banerjee, S. ^{[36
]}

Barberis, E. ^{[73
]}

Barfuss, A. -F. ^{[19
]}

Bargassa, P. ^{[90
]}

Baringer, P. ^{[68
]}

Barreto, J. ^{[3
]}

Bartlett, J. F. ^{[60
]}

Bassler, U. ^{[23
]}

Bauer, D. ^{[53
]}

Beale, S. ^{[7
,8
,9
,10
]}

Bean, A. ^{[68
]}

Begalli, M. ^{[4
]}

Begel, M. ^{[83
]}

Belanger-Champagne, C. ^{[48
,49
,50
,51
]}

Bellantoni, L. ^{[60
]}

机构：

[1] Joint Inst Nucl Res, Dubna, Russia

[2] Univ Buenos Aires, Buenos Aires, DF, Argentina

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

[4] Univ Estado Rio de Janeiro, BR-20550011 Rio De Janeiro, Brazil

[5] Univ Fed ABC, Santo Andre, Brazil

[6] Univ Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, Brazil

[7] Univ Alberta, Edmonton, AB, Canada

[8] Simon Fraser Univ, Burnaby, BC V5A 1S6, Canada

[9] York Univ, Toronto, ON M3J 2R7, Canada

[10] McGill Univ, Montreal, PQ, Canada

[11] Univ Sci & Technol China, Hefei 230026, Peoples R China

[12] Univ Los Andes, Bogota, Colombia

[13] Charles Univ Prague, Ctr Particle Phys, Prague, Czech Republic

[14] Czech Tech Univ, CR-16635 Prague, Czech Republic

[15] Acad Sci Czech Republic, Inst Phys, Ctr Particle Phys, Prague, Czech Republic

[16] Univ San Francisco Quito, Quito, Ecuador

[17] Univ Clermont Ferrand, LPC, CNRS, IN2P3, Clermont, France

[18] Univ Grenoble 1, CNRS, LPSC, IN2P3,Inst Natl Polytech Grenoble, Grenoble, France

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

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

[21] Univ Paris 06, CNRS, IN2P3, LPNHE, Paris, France

[22] Univ Paris 07, CNRS, IN2P3, LPNHE, Paris, France

[23] CEA, DAPNIA, Serv Phys Particules, Saclay, France

[24] Univ Strasbourg 1, IPHC, Strasbourg, France

[25] Univ Haute Alsace, CNRS, IN2P3, Strasbourg, France

[26] Univ Lyon 1, CNRS, IN2P3, IPNL, F-69622 Villeurbanne, France

[27] Univ Lyon, Lyon, France

[28] Rhein Westfal TH Aachen, Phys Inst A 3, Aachen, Germany

[29] Univ Bonn, Inst Phys, D-5300 Bonn, Germany

[30] Univ Freiburg, Inst Phys, Freiburg, Germany

[31] Johannes Gutenberg Univ Mainz, Inst Phys, D-6500 Mainz, Germany

[32] Univ Munich, Munich, Germany

[33] Univ Wuppertal, Fachbereich Phys, Wuppertal, Germany

[34] Panjab Univ, Chandigarh 160014, India

[35] Univ Delhi, Delhi 110007, India

[36] Tata Inst Fundamental Res, Mumbai 400005, Maharashtra, India

[37] Univ Coll Dublin, Dublin 2, Ireland

[38] Korea Univ, Korea Detector Lab, Seoul, South Korea

[39] Sungkyunkwan Univ, Suwon, South Korea

[40] CINVESTAV, Mexico City 14000, DF, Mexico

[41] Univ Amsterdam, NIKHEF, Amsterdam, Netherlands

[42] NIKHEF, FOM Inst, Amsterdam, Netherlands

[43] Radboud Univ Nijmegen, NIKHEF, NL-6525 ED Nijmegen, Netherlands

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

[45] Moscow MV Lomonosov State Univ, Moscow, Russia

[46] Inst High Energy Phys, Protvino, Russia

[47] Petersburg Nucl Phys Inst, St Petersburg, Russia

[48] Lund Univ, Lund, Sweden

[49] Stockholm Univ, S-10691 Stockholm, Sweden

[50] Royal Inst Technol, Stockholm, Sweden

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 18期

基金：

巴西圣保罗研究基金会; 瑞典研究理事会; 加拿大自然科学与工程研究理事会; 英国科学技术设施理事会;

关键词：

D O I：

10.1103/PhysRevLett.101.182004

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a study of the polarization of the Upsilon(1S) and Upsilon(2S) states using a 1.3 fb(-1) data sample collected by the D0 experiment in 2002-2006 during run II of the Fermilab Tevatron Collider. We measure the polarization parameter alpha=(sigma(T)-2 sigma(L))/(sigma(T)+2 sigma(L)), where sigma(T) and sigma(L) are the transversely and longitudinally polarized components of the production cross section, as a function of the transverse momentum (p(T)(Upsilon)) for the Upsilon(1S) and Upsilon(2S). Significant p(T)(Upsilon)-dependent longitudinal polarization is observed for the Upsilon(1S). A comparison with theoretical models is presented.

引用

页数：7

共 20 条

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