Measurement of azimuthal asymmetries associated with deeply virtual Compton scattering on an unpolarized deuterium target

被引：43

作者：

Airapetian, A. ^{[13
,16
]}

Akopov, N. ^{[28
]}

Akopov, Z. ^{[6
]}

Amarian, M. ^{[7
]}

Aschenauer, E. C. ^{[7
]}

Augustyniak, W. ^{[27
]}

Avakian, R. ^{[28
]}

Avetissian, A. ^{[28
]}

Avetisyan, E. ^{[6
]}

Ball, B. ^{[16
]}

Belostotski, S. ^{[19
]}

Bianchi, N. ^{[11
]}

Blok, H. P. ^{[18
,26
]}

Boettcher, H. ^{[7
]}

Borissov, A. ^{[6
]}

Bowles, J. ^{[14
]}

Bryzgalov, V. ^{[20
]}

Burns, J. ^{[14
]}

Capiluppi, M. ^{[9
,10
]}

Capitani, G. P. ^{[11
]}

Cisbani, E. ^{[22
,23
]}

Ciullo, G. ^{[9
,10
]}

Contalbrigo, M. ^{[9
,10
]}

Dalpiaz, P. F. ^{[9
,10
]}

Deconinck, W. ^{[6
,16
]}

De Leo, R. ^{[3
]}

De Nardo, L. ^{[6
,24
]}

De Sanctis, E. ^{[11
]}

Diefenthaler, M. ^{[1
]}

Di Nezza, P. ^{[11
]}

Dreschler, J. ^{[18
]}

Dueren, M.

Ehrenfried, M. ^{[13
]}

Elbakian, G. ^{[28
]}

Ellinghaus, F. ^{[5
]}

Fabbri, R. ^{[7
]}

Fantoni, A. ^{[11
]}

Felawka, L. ^{[24
]}

Frullani, S. ^{[22
,23
]}

Gabbert, D. ^{[7
]}

Gapienko, G. ^{[20
]}

Gapienko, V. ^{[20
]}

Garibaldi, F. ^{[22
,23
]}

Gavrilov, G. ^{[6
,19
,24
]}

Gharibyan, V. ^{[28
]}

Giordano, F. ^{[6
,9
,10
]}

Gliske, S. ^{[16
]}

Hadjidakis, C. ^{[11
]}

Hartig, M. ^{[6
]}

Hasch, D. ^{[11
]}

机构：

[1] Univ Erlangen Nurnberg, Inst Phys, D-91058 Erlangen, Germany

[2] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA

[3] Ist Nazl Fis Nucl, Sez Bari, I-70124 Bari, Italy

[4] Peking Univ, Sch Phys, Beijing 100871, Peoples R China

[5] Univ Colorado, Nucl Phys Lab, Boulder, CO 80309 USA

[6] DESY, D-22603 Hamburg, Germany

[7] DESY, D-15738 Zeuthen, Germany

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

[9] Univ Ferrara, Ist Nazl Fis Nucl, Sez Ferrara, I-44100 Ferrara, Italy

[10] Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy

[11] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[12] Univ Ghent, Dept Subatom & Radiat Phys, B-9000 Ghent, Belgium

[13] Univ Giessen, Inst Phys, D-35392 Giessen, Germany

[14] Univ Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland

[15] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

[16] Univ Michigan, Randall Lab Phys, Ann Arbor, MI 48109 USA

[17] PN Lebedev Phys Inst, Moscow 117924, Russia

[18] Natl Inst Subatom Phys Nikhef, NL-1009 DB Amsterdam, Netherlands

[19] Petersburg Nucl Phys Inst, Gatchina 188300, Leningrad Regio, Russia

[20] Inst High Energy Phys, Protvino 142281, Moscow Region, Russia

[21] Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany

[22] Ist Super Sanita, Ist Nazl Fis Nucl, Sez Roma 1, Grp Sanita, I-00161 Rome, Italy

[23] Ist Super Sanita, Phys Lab, I-00161 Rome, Italy

[24] TRIUMF, Vancouver, BC V6T 2A3, Canada

[25] Tokyo Inst Technol, Dept Phys, Tokyo 152, Japan

[26] Vrije Univ Amsterdam, Dept Phys, NL-1081 HV Amsterdam, Netherlands

[27] Andrzej Soltan Inst Nucl Studies, PL-00689 Warsaw, Poland

[28] Yerevan Phys Inst, Yerevan 375036, Armenia

来源：

NUCLEAR PHYSICS B | 2010年 / 829卷 / 1-2期

基金：

中国国家自然科学基金; 加拿大自然科学与工程研究理事会; 美国国家科学基金会; 英国科学技术设施理事会; 英国工程与自然科学研究理事会;

关键词：

DIS; HERMES experiment; GPD; DVCS; Deuteron; Unpolarized deuterium target; GENERALIZED PARTON DISTRIBUTIONS; EVOLUTION KERNELS; NUCLEON; AMPLITUDE;

D O I：

10.1016/j.nuclphysb.2009.12.004

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：

Azimuthal asymmetries in exclusive electroproduction of a real photon from an unpolarized deuterium target are measured with respect to beam helicity and charge. They appear in the distribution of these photons in the azimuthal angle phi around the virtual-photon direction, relative to the lepton scattering plane. The extracted asymmetries are attributed to either the deeply virtual Compton scattering process or its interference with the Bethe-Heitler process. They are compared with earlier results on the proton target. In the measured kinematic region, the beam-charge asymmetry amplitudes and the leading amplitudes of the beam-helicity asymmetries on an unpolarized deuteron target are compatible with the results from unpolarized protons. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：1 / 27

页数：27

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