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Titolo:
Observation of exclusive deeply virtual Compton scattering in polarized electron beam asymmetry measurements - art. no. 182002
Autore:
Stepanyan, S; Burkert, VD; Elouadrhiri, L; Adams, GS; Anciant, E; Anghinolfi, M; Asavapibhop, B; Audit, G; Auger, T; Avakian, H; Ball, J; Barrow, S; Battaglieri, M; Beard, K; Bektasoglu, M; Bertin, P; Bianchi, N; Biselli, A; Boiarinov, S; Bonner, BE; Bouchigny, S; Branford, D; Brooks, WK; Calarco, JR; Carman, DS; Carnahan, B; Ciciani, L; Cole, PL; Coleman, A; Cords, D; Corvisiero, P; Crabb, D; Crannell, H; Cummings, J; Degtiarenko, PV; Denizli, H; Dennis, LC; De Sanctis, E; DeVita, R; Dharmawardane, KV; Djalali, C; Dodge, GE; Dore, D; Doughty, D; Dragovitsch, P; Dytman, S; Eckhause, M; Egiyan, H; Egiyan, KS; Empl, A; Fatemi, R; Feuerbach, RJ; Ficenec, J; Fissum, K; Forest, TA; Freyberger, AP; Funsten, H; Gaff, S; Gai, M; Garcon, M; Gavalian, G; Gilad, S; Gilfoyle, GP; Giovanetti, K; Girard, P; Griffioen, KA; Guidal, M; Guillo, M; Gyurjyan, V; Hadjidakis, C; Hardie, J; Heddle, D; Hersman, FW; Hicks, K; Hicks, RS; Holtrop, M; Hu, J; Hyde-Wright, CE; Ito, MM; Jenkins, D; Joo, K; Kelley, J; Khandaker, M; Kim, DH; Kim, K; Kim, KY; Kim, W; Klein, A; Klein, FJ; Klusman, M; Kossov, M; Kramer, LH; Kuhn, SE; Laget, JM; Lawrence, D; Longhi, A; Lukashin, K; Manak, JJ; Marchand, C; McAleer, S; McCarthy, J; McNabb, JWC; Mecking, BA; Mestayer, MD; Meyer, CA; Mikhailov, K; Minehart, R; Mirazita, M; Miskimen, R; Morand, L; Muccifora, V; Mueller, J; Mutchler, GS; Napolitano, J; Nelson, S; Niccolai, S; Niculescu, G; Niculescu, I; Niyazov, RA; Opper, A; ORielly, G; OBrien, JT; Park, K; Pasyuk, E; Peterson, GA; Philips, S; Pivnyuk, N; Pocanic, D; Pogorelko, O; Polli, E; Popa, I; Pozdniakov, S; Preedom, BM; Price, JW; Protopopescu, D; Qin, LM; Raue, BA; Reolon, AR; Riccardi, G; Ricco, G; Ripani, M; Ritchie, BG; Ronchetti, F; Rossi, P; Rowntree, D; Rubin, PD; Sabatie, F; Sabourov, K; Salgado, CW; Sapunenko, V; Schumacher, RA; Serov, V; Sharabian, YG; Shaw, J; Simionatto, S; Skabelin, A; Smith, ES; Smith, LC; Sober, DI; Stavinsky, A; Stoler, P; Strakovsky, II; Suleiman, R; Taiuti, M; Taylor, S; Tedeschi, D; Thompson, R; Todor, L; Vineyard, MF; Vlassov, A; Wang, K; Weller, H; Weinstein, LB; Welsh, R; Weygand, DP; Whisnant, S; Wolin, E; Yegneswaran, A; Yun, J; Zhao, J; Zhang, B; Zhou, Z;
Indirizzi:
Christopher Newport Univ, Newport News, VA 23606 USA Christopher Newport Univ Newport News VA USA 23606 ort News, VA 23606 USA Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA ThomasJefferson Natl Accelerator Facil Newport News VA USA 23606 606 USA Arizona State Univ, Dept Phys & Astron, Tempe, AZ 85287 USA Arizona State Univ Tempe AZ USA 85287 Phys & Astron, Tempe, AZ 85287 USA Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA UnivCalif Los Angeles Los Angeles CA USA 90095 Los Angeles, CA 90095 USA Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA Carnegie Mellon Univ Pittsburgh PA USA 15213 ys, Pittsburgh, PA 15213 USA Catholic Univ Amer, Dept Phys, Washington, DC 20064 USA Catholic Univ Amer Washington DC USA 20064 Phys, Washington, DC 20064 USA CEA Saclay, DAPNIA, SPhN, F-91191 Gif Sur Yvette, France CEA Saclay Gif Sur Yvette France F-91191 F-91191 Gif Sur Yvette, France Univ Connecticut, Dept Phys, Storrs, CT 06269 USA Univ Connecticut StorrsCT USA 06269 cut, Dept Phys, Storrs, CT 06269 USA Univ Clermont Ferrand, IN2P3, Aubiere, France Univ Clermont Ferrand Aubiere France nt Ferrand, IN2P3, Aubiere, France Duke Univ, Dept Phys, Durham, NC 27706 USA Duke Univ Durham NC USA 27706Duke Univ, Dept Phys, Durham, NC 27706 USA Univ Edinburgh, Dept Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland Univ Edinburgh Edinburgh Midlothian Scotland EH9 3JZ Midlothian, Scotland Florida Int Univ, Dept Phys, Miami, FL 33199 USA Florida Int Univ Miami FL USA 33199 Univ, Dept Phys, Miami, FL 33199 USA Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy Ist Nazl FisNucl Frascati Italy I-00044 ascati, I-00044 Frascati, Italy Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy Ist Nazl Fis Nucl Genoa Italy I-16146 , Sez Genova, I-16146 Genoa, Italy Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy Univ Genoa Genoa Italy I-16146 a, Dipartimento Fis, I-16146 Genoa, Italy George Washington Univ, Dept Phys, Washington, DC 20052 USA George Washington Univ Washington DC USA 20052 , Washington, DC 20052 USA Inst Theoret & Expt Phys, Moscow 117259, Russia Inst Theoret & Expt Phys Moscow Russia 117259 hys, Moscow 117259, Russia James Madison Univ, Dept Phys, Harrisonburg, VA 22807 USA James Madison Univ Harrisonburg VA USA 22807 , Harrisonburg, VA 22807 USA Kyungpook Natl Univ, Dept Phys, Taegu 702701, South Korea Kyungpook Natl Univ Taegu South Korea 702701 , Taegu 702701, South Korea Univ Massachusetts, Dept Phys, Amherst, MA 01003 USA Univ Massachusetts Amherst MA USA 01003 Dept Phys, Amherst, MA 01003 USA MIT, Bates Linear Accelerator, Middleton, MA 01949 USA MIT Middleton MA USA 01949 es Linear Accelerator, Middleton, MA 01949 USA Univ New Hampshire, Dept Phys, Durham, NH 03824 USA Univ New Hampshire Durham NH USA 03824 e, Dept Phys, Durham, NH 03824 USA Norfolk State Univ, Norfolk, VA 23504 USA Norfolk State Univ Norfolk VA USA 23504 State Univ, Norfolk, VA 23504 USA Ohio Univ, Dept Phys, Athens, OH 45701 USA Ohio Univ Athens OH USA 45701Ohio Univ, Dept Phys, Athens, OH 45701 USA Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA Old Dominion Univ Norfolk VA USA 23529 , Dept Phys, Norfolk, VA 23529 USA IN2P3, Inst Phys Nucl Orsay, F-91406 Orsay, France IN2P3 Orsay France F-91406 , Inst Phys Nucl Orsay, F-91406 Orsay, France Univ Pittsburgh, Dept Phys, Pittsburgh, PA 15260 USA Univ Pittsburgh Pittsburgh PA USA 15260 pt Phys, Pittsburgh, PA 15260 USA Rensselaer Polytech Inst, Dept Phys, Troy, NY 12181 USA Rensselaer Polytech Inst Troy NY USA 12181 Dept Phys, Troy, NY 12181 USA Rice Univ, TW Bonner Nucl Lab, Houston, TX 77005 USA Rice Univ Houston TXUSA 77005 TW Bonner Nucl Lab, Houston, TX 77005 USA Univ Richmond, Dept Phys, Richmond, VA 23173 USA Univ Richmond Richmond VA USA 23173 nd, Dept Phys, Richmond, VA 23173 USA Univ S Carolina, Dept Phys, Columbia, SC 29208 USA Univ S Carolina Columbia SC USA 29208 , Dept Phys, Columbia, SC 29208 USA Univ Texas, Dept Phys, El Paso, TX 79968 USA Univ Texas El Paso TX USA 79968 v Texas, Dept Phys, El Paso, TX 79968 USA Univ Virginia, Dept Phys, Charlottesville, VA 22903 USA Univ Virginia Charlottesville VA USA 22903 Charlottesville, VA 22903 USA Virginia Polytech Inst & State Univ, Dept Phys, Blacksburg, VA 24061 USA Virginia Polytech Inst & State Univ Blacksburg VA USA 24061 VA 24061 USA Coll William & Mary, Dept Phys, Williamsburg, VA 23185 USA Coll William & Mary Williamsburg VA USA 23185 Williamsburg, VA 23185 USA Yerevan Phys Inst, Yerevan 375036, Armenia Yerevan Phys Inst Yerevan Armenia 375036 s Inst, Yerevan 375036, Armenia
Titolo Testata:
PHYSICAL REVIEW LETTERS
fascicolo: 18, volume: 8718, anno: 2001,
pagine: 2002 -
SICI:
0031-9007(20011029)8718:18<2002:OOEDVC>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
NUCLEON; ELECTROPRODUCTION; MESONS; DISTRIBUTIONS; PHOTONS; QCD;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
21
Recensione:
Indirizzi per estratti:
Indirizzo: Stepanyan, S Christopher Newport Univ, Newport News, VA 23606 USA Christopher Newport Univ Newport News VA USA 23606 23606 USA
Citazione:
S. Stepanyan et al., "Observation of exclusive deeply virtual Compton scattering in polarized electron beam asymmetry measurements - art. no. 182002", PHYS REV L, 8718(18), 2001, pp. 2002

Abstract

We report the first results of the beam-spin asymmetry measured in the reaction (e) over right arrowp --> ep gamma at a beam energy of 4.25 GeV. A large asymmetry with a sin phi modulation is observed, as predicted for the interference term of deeply virtual compton scattering (DVCS) and the Bethe-Heitler process. The amplitude of this modulation is alpha = 0.202 +/- 0.028. In leading-order and leading-twist perturbative QCD, the alpha is directly proportional to the imaginary part of the DVCS amplitude.

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Documento generato il 27/09/20 alle ore 12:05:04