Exclusive π0 electroproduction at W > 2 GeV with CLAS

被引：43

作者：

Bedlinskiy, I. ^{[19
]}

Kubarovsky, V. ^{[27
,32
]}

Niccolai, S. ^{[12
,18
]}

Stoler, P. ^{[27
]}

Adhikari, K. P. ^{[26
]}

Anderson, M. D. ^{[35
]}

Pereira, S. Anefalos ^{[15
]}

Avakian, H. ^{[32
]}

Ball, J. ^{[6
]}

Baltzell, N. A. ^{[1
,31
]}

Battaglieri, M. ^{[16
]}

Batourine, V. ^{[21
,32
]}

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

Boiarinov, S. ^{[32
]}

Bono, J. ^{[10
]}

Briscoe, W. J. ^{[12
]}

Brooks, W. K. ^{[32
,33
]}

Burkert, V. D. ^{[32
]}

Carman, D. S. ^{[32
]}

Celentano, A. ^{[16
]}

Chandavar, S. ^{[25
]}

Colaneri, L. ^{[17
]}

Cole, P. L. ^{[13
]}

Contalbrigo, M. ^{[14
]}

Cortes, O. ^{[13
]}

Crede, V. ^{[11
]}

D'Angelo, A. ^{[17
,29
]}

Dashyan, N. ^{[39
]}

De Vita, R. ^{[16
]}

De Sanctis, E. ^{[15
]}

Deur, A. ^{[32
]}

Djalali, C. ^{[31
]}

Doughty, D. ^{[7
,32
]}

Dupre, R. ^{[18
]}

Egiyan, H. ^{[23
,32
]}

El Alaoui, A. ^{[1
]}

El Fassi, L. ^{[26
]}

Elouadrhiri, L. ^{[32
]}

Eugenio, P. ^{[11
]}

Fedotov, G. ^{[30
,31
]}

Fegan, S. ^{[16
]}

Fleming, J. A. ^{[34
]}

Forest, T. A. ^{[13
]}

Garillon, B. ^{[18
]}

Garcon, M. ^{[6
]}

Gavalian, G. ^{[26
]}

Gevorgyan, N. ^{[39
]}

Ghandilyan, Y. ^{[39
]}

Gilfoyle, G. P. ^{[28
]}

Giovanetti, K. L. ^{[20
]}

机构：

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

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

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

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

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

[6] CEA, Ctr Saclay, Irfu Serv Phys Nucl, F-91191 Gif Sur Yvette, France

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

[8] Univ Connecticut, Storrs, CT 06269 USA

[9] Fairfield Univ, Fairfield, CT 06824 USA

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

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

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

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

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

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

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

[17] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, I-00133 Rome, Italy

[18] Inst Phys Nucl ORSAY, Orsay, France

[19] Inst Theoret & Expt Phys, Moscow 117218, Russia

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

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

[22] Univ Grenoble 1, CNRS, LPSC, INPG,IN2P3, Grenoble, France

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

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

[25] Ohio Univ, Athens, OH 45701 USA

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

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

[28] Univ Richmond, Richmond, VA 23173 USA

[29] Univ Roma Tor Vergata, I-00133 Rome, Italy

[30] Moscow MV Lomonosov State Univ, Skobeltsyn Inst Nucl Phys, Moscow 119234, Russia

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

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

[33] Univ Tecn Federico Santa Maria, Region, Chile

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

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

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

[37] Univ Virginia, Charlottesville, VA 22901 USA

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

[39] Yerevan Phys Inst, Yerevan 375036, Armenia

来源：

PHYSICAL REVIEW C | 2014年 / 90卷 / 02期

基金：

英国科学技术设施理事会; 美国国家科学基金会; 新加坡国家研究基金会;

关键词：

PION ELECTROPRODUCTION; PARTON DISTRIBUTIONS; MESONS; TRANSVERSITY; SYSTEM;

D O I：

10.1103/PhysRevC.90.025205

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Exclusive neutral-pion electroproduction (ep -> e'p'pi(0)) was measured at Jefferson Lab with a 5.75-GeV electron beam and the CLAS detector. Differential cross sections d(4)sigma/dtdQ(2)dx(B)d phi(pi) and structure functions sigma(T) + sigma(L), sigma(TT), and sigma(LT) as functions of t were obtained over a wide range of Q(2) and x(B). The data are compared with Regge and handbag theoretical calculations. Analyses in both frameworks find that a large dominance of transverse processes is necessary to explain the experimental results. For the Regge analysis it is found that the inclusion of vector meson rescattering processes is necessary to bring the magnitude of the calculated and measured structure functions into rough agreement. In the handbag framework, there are two independent calculations, both of which appear to roughly explain the magnitude of the structure functions in terms of transversity generalized parton distributions.

引用

页数：26

共 37 条

[21] Flexible parametrization of generalized parton distributions from deeply virtual Compton scattering observables [J].