Measurement of deeply virtual compton scattering beam-spin asymmetries

被引：174

作者：

Girod, F. X. ^{[1
,2
]}

Niyazov, R. A. ^{[2
,32
]}

Avakian, H. ^{[2
]}

Ball, J. ^{[1
]}

Bedlinskiy, I. ^{[3
]}

Burkert, V. D. ^{[2
]}

De Masi, R. ^{[1
,4
]}

Elouadrhiri, L. ^{[2
]}

Garcon, M. ^{[1
]}

Guidal, M. ^{[4
]}

Jo, H. S. ^{[4
]}

Joo, K. ^{[12
]}

Kubarovsky, V. ^{[2
,32
]}

Kuleshov, S. V. ^{[3
]}

MacCormick, M. ^{[4
]}

Niccolai, S. ^{[4
]}

Pogorelko, O. ^{[3
]}

Sabatie, F. ^{[1
]}

Stepanyan, S. ^{[2
]}

Stoler, P. ^{[32
]}

Ungaro, M. ^{[12
]}

Zhao, B. ^{[12
]}

Amaryan, M. J. ^{[31
]}

Ambrozewicz, P. ^{[15
]}

Anghinolfi, M. ^{[21
]}

Asryan, G. ^{[40
]}

Bagdasaryan, H. ^{[31
]}

Baillie, N. ^{[29
]}

Ball, J. P. ^{[6
]}

Baltzell, N. A. ^{[35
]}

Batourine, V. ^{[23
]}

Battaglieri, M. ^{[21
]}

Bellis, M. ^{[9
]}

Benmouna, N. ^{[17
]}

Berman, B. L. ^{[17
]}

Biselli, A. S. ^{[9
,14
]}

Blaszczyk, L. ^{[16
]}

Bouchigny, S. ^{[4
]}

Boiarinov, S. ^{[2
]}

Bradford, R. ^{[9
]}

Branford, D. ^{[13
]}

Briscoe, W. J. ^{[17
]}

Brooks, W. K. ^{[2
]}

Bultmann, S. ^{[31
]}

Butuceanu, C. ^{[39
]}

Calarco, J. R. ^{[28
]}

Careccia, S. L. ^{[31
]}

Carman, D. S. ^{[2
]}

Casey, L. ^{[10
]}

Chen, S. ^{[16
]}

机构：

[1] CEA Saclay, Serv Phys Nucl, F-91191 Gif Sur Yvette, France

[2] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA

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

[4] Univ Paris 11, IPNO, CNRS, IN2P3, F-91406 Orsay, France

[5] Argonne Natl Lab, Argonne, IL 60439 USA

[6] Arizona State Univ, Tempe, AZ 85287 USA

[7] Univ Calif Los Angeles, Los Angeles, CA 90095 USA

[8] Calif State Univ Dominguez Hills, Carson, CA 90747 USA

[9] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

[10] Catholic Univ Amer, Washington, DC 20064 USA

[11] Christopher Newport Univ, Newport News, VA 23606 USA

[12] Univ Connecticut, Storrs, CT 06269 USA

[13] Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland

[14] Fairfield Univ, Fairfield, CT 06824 USA

[15] Florida Int Univ, Miami, FL 33199 USA

[16] Florida State Univ, Tallahassee, FL 32306 USA

[17] George Washington Univ, Washington, DC 20052 USA

[18] Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland

[19] Idaho State Univ, Pocatello, ID 83209 USA

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

[21] Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy

[22] James Madison Univ, Harrisonburg, VA 22807 USA

[23] Kyungpook Natl Univ, Taegu 702701, South Korea

[24] Univ Blaise Pascal, CNRS IN2P3, LPC Clermont Ferrand, F-63177 Clermont Ferrand, France

[25] Univ Grenoble 1, CNRS IN2P3, LPSC, F-38026 St Martin Dheres, France

[26] Univ Massachusetts, Amherst, MA 01003 USA

[27] Moscow MV Lomonosov State Univ, Gen Nucl Phys Inst, Moscow 119899, Russia

[28] Univ New Hampshire, Durham, NH 03824 USA

[29] Norfolk State Univ, Norfolk, VA 23504 USA

[30] Ohio Univ, Athens, OH 45701 USA

[31] Old Dominion Univ, Norfolk, VA 23529 USA

[32] Rensselaer Polytech Inst, Troy, NY 12180 USA

[33] Rice Univ, Houston, TX 77005 USA

[34] Univ Richmond, Richmond, VA 23173 USA

[35] Univ S Carolina, Columbia, SC 29208 USA

[36] Union Coll, Schenectady, NY 12308 USA

[37] Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA

[38] Univ Virginia, Charlottesville, VA 22901 USA

[39] Coll William & Mary, Williamsburg, VA 23187 USA

[40] Yerevan Phys Inst, Yerevan 375036, Armenia

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 16期

基金：

英国科学技术设施理事会;

关键词：

Compton scattering;

D O I：

10.1103/PhysRevLett.100.162002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The beam-spin asymmetries in the hard exclusive electroproduction of photons on the proton (e(->)p -> ep gamma) were measured over a wide kinematic range and with high statistical accuracy. These asymmetries result from the interference of the Bethe-Heitler process and of deeply virtual Compton scattering. Over the whole kinematic range (x(B) from 0.11 to 0.58, Q(2) from 1 to 4.8 GeV2, -t from 0.09 to 1.8 GeV2), the azimuthal dependence of the asymmetries is compatible with expectations from leading-twist dominance, A similar or equal to a sin phi/(1+c cos phi). This extensive set of data can thus be used to constrain significantly the generalized parton distributions of the nucleon in the valence quark sector.

引用

页数：6

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