Exclusive ρ0 muoproduction on transversely polarised protons and deuterons

被引：21

作者：

Adolph, C. ^{[9
]}

Alekseev, M. G. ^{[25
]}

Alexakhin, V. Yu ^{[8
]}

Alexandrov, Yu ^{[16
]}

Alexeev, G. D. ^{[8
]}

Amoroso, A. ^{[27
,28
]}

Antonov, A. A. ^{[8
]}

Austregesilo, A. ^{[11
,18
]}

Badelek, B. ^{[31
]}

Balestra, F. ^{[27
,28
]}

Barth, J. ^{[5
]}

Baum, G. ^{[2
]}

Bedfer, Y. ^{[23
]}

Bernhard, J. ^{[14
]}

Bertini, R. ^{[27
,28
]}

Bettinelli, M. ^{[17
]}

Bicker, K. ^{[11
,18
]}

Bieling, J. ^{[5
]}

Birsa, R. ^{[25
]}

Bisplinghoff, J. ^{[4
]}

Bordalo, P. ^{[13
,34
]}

Bradamante, F. ^{[1
,25
]}

Braun, C. ^{[9
]}

Bravar, A. ^{[25
]}

Bressan, A. ^{[1
,25
]}

Buechele, M. ^{[10
]}

Burtin, E. ^{[23
]}

Capozza, L. ^{[23
]}

Chiosso, M. ^{[27
,28
]}

Chung, S. U. ^{[18
]}

Cicuttin, A. ^{[25
,26
]}

Crespo, M. L. ^{[25
,26
]}

Dalla Torre, S. ^{[25
]}

Das, S. ^{[7
]}

Dasgupta, S. S. ^{[7
]}

Dasgupta, S. ^{[7
]}

Denisov, O. Yu ^{[28
]}

Dhara, L. ^{[7
]}

Donskov, S. V. ^{[22
]}

Doshita, N. ^{[33
]}

Duic, V. ^{[1
,25
]}

Duennweber, W. ^{[17
]}

Dziewiecki, M. ^{[32
]}

Efremov, A. ^{[8
]}

Elia, C. ^{[1
,25
]}

Eversheim, P. D. ^{[4
]}

Eyrich, W. ^{[9
]}

Faessler, M. ^{[17
]}

Ferrero, A. ^{[23
]}

Filin, A. ^{[22
]}

机构：

[1] Univ Trieste, Dept Phys, I-34127 Trieste, Italy

[2] Univ Bielefeld, Fak Phys, D-33501 Bielefeld, Germany

[3] Ruhr Univ Bochum, Inst Expt Phys, D-44780 Bochum, Germany

[4] Univ Bonn, Helmholtz Inst Strahlen & Kernphys, D-53115 Bonn, Germany

[5] Univ Bonn, Inst Phys, D-53115 Bonn, Germany

[6] AS CR, Inst Sci Instruments, Brno 61264, Czech Republic

[7] Matrivani Inst Expt Res & Educ, Kolkata 700030, W Bengal, India

[8] Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia

[9] Univ Erlangen Nurnberg, Inst Phys, D-91054 Erlangen, Germany

[10] Univ Freiburg, Inst Phys, D-79104 Freiburg, Germany

[11] CERN, CH-1211 Geneva 23, Switzerland

[12] Tech Univ Liberec, Liberec 46117, Czech Republic

[13] LIP, P-1000149 Lisbon, Portugal

[14] Johannes Gutenberg Univ Mainz, Inst Kernphys, D-55099 Mainz, Germany

[15] Miyazaki Univ, Miyazaki 8892192, Japan

[16] Lebedev Phys Inst, Moscow 119991, Russia

[17] Univ Munich, Dept Phys, D-80799 Munich, Germany

[18] Tech Univ Munich, Dept Phys, D-85748 Garching, Germany

[19] Nagoya Univ, Nagoya, Aichi 464, Japan

[20] Charles Univ Prague, Fac Math & Phys, CR-18000 Prague, Czech Republic

[21] Czech Tech Univ, Prague 16636, Czech Republic

[22] State Res Ctr Russian Federat, Inst High Energy Phys, Protvino 142281, Russia

[23] CEA IRFU SPhN Saclay, Gif Sur Yvette 91191, France

[24] Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel

[25] Ist Nazl Fis Nucl, Trieste Sect, I-34127 Trieste, Italy

[26] Abdus Salam Int Ctr Theoret Phys, I-34151 Trieste, Italy

[27] Univ Turin, Dept Phys, I-10125 Turin, Italy

[28] Ist Nazl Fis Nucl, Torino Sect, I-10125 Turin, Italy

[29] Univ Piemonte Orientale, I-15100 Alessandria, Italy

[30] Natl Ctr Nucl Res, PL-00681 Warsaw, Poland

[31] Univ Warsaw, PL-00681 Warsaw, Poland

[32] Warsaw Univ Technol, Inst Radioelect, PL-00665 Warsaw, Poland

[33] Yamagata Univ, Yamagata 9928510, Japan

[34] Univ Tecn Lisboa, IST, P-1100 Lisbon, Portugal

[35] Chubu Univ, Kasugai, Aichi 4878501, Japan

[36] KEK, Tsukuba, Ibaraki 3050801, Japan

[37] GSI mbH, D-64291 Darmstadt, Germany

来源：

NUCLEAR PHYSICS B | 2012年 / 865卷 / 01期

基金：

以色列科学基金会;

关键词：

VECTOR-MESON ELECTROPRODUCTION; DISTRIBUTIONS; SCATTERING; ASYMMETRY;

D O I：

10.1016/j.nuclphysb.2012.07.025

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：

The transverse target spin azimuthal asymmetry A(UT)(sin(phi-phi s)) in hard exclusive production of rho(0) mesons was measured at COMPASS by scattering 160 GeV/c muons off transversely polarised protons and deuterons. The measured asymmetry is sensitive to the nucleon helicity-flip generalised parton distributions E-q, which are related to the orbital angular momentum of quarks in the nucleon. The Q(2), x-B-j and p(T)(2) dependence of A(UT)(sin(phi-phi s)) is presented in a wide kinematic range: 1 (GeV/c)(2) < Q(2) < 10 (GeV/c)(2), 0.003 < xB(j) < 0.3 and 0.05 (GeV/c)(2) < p(T)(2) < 0.5 (GeV/c)(2) for protons or 0.10 (GeV/c)(2) < p(T)(2) < 0.5 (GeV/c)(2) for deuterons. Results for deuterons are obtained for the first time. The measured asymmetry is small in the whole kinematic range for both protons and deuterons, which is consistent with the theoretical interpretation that contributions from GPDs E-u and E-d approximately cancel. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：1 / 20

页数：20

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