Measurement of deeply virtual compton scattering beam-spin asymmetries

F. X. Girod; R. A. Niyazov; H. Avakian; J. Ball; I. Bedlinskiy; V. D. Burkert; R. De Masi; L. Elouadrhiri; M. Garçon; M. Guidal; H. S. Jo; K. Joo; V. Kubarovsky; S. V. Kuleshov; M. MacCormick; S. Niccolai; O. Pogorelko; F. Sabatié; S. Stepanyan; P. Stoler; M. Ungaro; B. Zhao; M. J. Amaryan; P. Ambrozewicz; M. Anghinolfi; G. Asryan; H. Bagdasaryan; N. Baillie; J. P. Ball; N. A. Baltzell; V. Batourine; M. Battaglieri; M. Bellis; N. Benmouna; B. L. Berman; A. S. Biselli; L. Blaszczyk; S. Bouchigny; S. Boiarinov; R. Bradford; D. Branford; W. J. Briscoe; W. K. Brooks; S. Bültmann; C. Butuceanu; J. R. Calarco; S. L. Careccia; D. S. Carman; L. Casey; S. Chen; L. Cheng; P. L. Cole; P. Collins; P. Coltharp; D. Crabb; V. Crede; N. Dashyan; E. De Sanctis; R. De Vita; P. V. Degtyarenko; A. Deur; K. V. Dharmawardane; R. Dickson; C. Djalali; G. E. Dodge; J. Donnelly; D. Doughty; Michael Dugger; O. P. Dzyubak; H. Egiyan; K. S. Egiyan; L. El Fassi; P. Eugenio; G. Fedotov; G. Feldman; H. Funsten; G. Gavalian; G. P. Gilfoyle; K. L. Giovanetti; J. T. Goetz; A. Gonenc; R. W. Gothe; K. A. Griffioen; N. Guler; L. Guo; V. Gyurjyan; K. Hafidi; H. Hakobyan; C. Hanretty; F. W. Hersman; K. Hicks; I. Hleiqawi; M. Holtrop; C. E. Hyde; Y. Ilieva; D. G. Ireland; B. S. Ishkhanov; E. L. Isupov; M. M. Ito; D. Jenkins; J. R. Johnstone; H. G. Juengst; N. Kalantarians; J. D. Kellie; M. Khandaker; W. Kim; A. Klein; F. J. Klein; A. V. Klimenko; M. Kossov; Z. Krahn; L. H. Kramer; J. Kuhn; S. E. Kuhn; J. Lachniet; J. M. Laget; J. Langheinrich; D. Lawrence; T. Lee; K. Livingston; H. Y. Lu; N. Markov; P. Mattione; M. Mazouz; B. McKinnon; B. A. Mecking; M. D. Mestayer; C. A. Meyer; T. Mibe; B. Michel; K. Mikhailov; M. Mirazita; R. Miskimen; V. Mokeev; K. Moriya; S. A. Morrow; M. Moteabbed; E. Munevar; G. S. Mutchler; P. Nadel-Turonski; R. Nasseripour; G. Niculescu; I. Niculescu; B. B. Niczyporuk; M. R. Niroula; M. Nozar; M. Osipenko; A. I. Ostrovidov; K. Park; E. Pasyuk; C. Paterson; S. Anefalos Pereira; J. Pierce; N. Pivnyuk; D. Pocanic; S. Pozdniakov; J. W. Price; S. Procureur; Y. Prok; D. Protopopescu; B. A. Raue; G. Ricco; M. Ripani; Barry Ritchie; G. Rosner; P. Rossi; J. Salamanca; C. Salgado; J. P. Santoro; V. Sapunenko; R. A. Schumacher; V. S. Serov; Y. G. Sharabian; D. Sharov; N. V. Shvedunov; E. S. Smith; L. C. Smith; D. I. Sober; D. Sokhan; A. Stavinsky; S. S. Stepanyan; B. E. Stokes; I. I. Strakovsky; S. Strauch; M. Taiuti; D. J. Tedeschi; A. Tkabladze; S. Tkachenko; C. Tur; M. F. Vineyard; A. V. Vlassov; E. Voutier; D. P. Watts; L. B. Weinstein; D. P. Weygand; M. Williams; E. Wolin; M. H. Wood; A. Yegneswaran; L. Zana; J. Zhang; Z. W. Zhao

doi:10.1103/PhysRevLett.100.162002

Measurement of deeply virtual compton scattering beam-spin asymmetries

F. X. Girod, R. A. Niyazov, H. Avakian, J. Ball, I. Bedlinskiy, V. D. Burkert, R. De Masi, L. Elouadrhiri, M. Garçon, M. Guidal, H. S. Jo, K. Joo, V. Kubarovsky, S. V. Kuleshov, M. MacCormick, S. Niccolai, O. Pogorelko, F. Sabatié, S. Stepanyan, P. StolerM. Ungaro, B. Zhao, M. J. Amaryan, P. Ambrozewicz, M. Anghinolfi, G. Asryan, H. Bagdasaryan, N. Baillie, J. P. Ball, N. A. Baltzell, V. Batourine, M. Battaglieri, M. Bellis, N. Benmouna, B. L. Berman, A. S. Biselli, L. Blaszczyk, S. Bouchigny, S. Boiarinov, R. Bradford, D. Branford, W. J. Briscoe, W. K. Brooks, S. Bültmann, C. Butuceanu, J. R. Calarco, S. L. Careccia, D. S. Carman, L. Casey, S. Chen, L. Cheng, P. L. Cole, P. Collins, P. Coltharp, D. Crabb, V. Crede, N. Dashyan, E. De Sanctis, R. De Vita, P. V. Degtyarenko, A. Deur, K. V. Dharmawardane, R. Dickson, C. Djalali, G. E. Dodge, J. Donnelly, D. Doughty, Michael Dugger, O. P. Dzyubak, H. Egiyan, K. S. Egiyan, L. El Fassi, P. Eugenio, G. Fedotov, G. Feldman, H. Funsten, G. Gavalian, G. P. Gilfoyle, K. L. Giovanetti, J. T. Goetz, A. Gonenc, R. W. Gothe, K. A. Griffioen, N. Guler, L. Guo, V. Gyurjyan, K. Hafidi, H. Hakobyan, C. Hanretty, F. W. Hersman, K. Hicks, I. Hleiqawi, M. Holtrop, C. E. Hyde, Y. Ilieva, D. G. Ireland, B. S. Ishkhanov, E. L. Isupov, M. M. Ito, D. Jenkins, J. R. Johnstone, H. G. Juengst, N. Kalantarians, J. D. Kellie, M. Khandaker, W. Kim, A. Klein, F. J. Klein, A. V. Klimenko, M. Kossov, Z. Krahn, L. H. Kramer, J. Kuhn, S. E. Kuhn, J. Lachniet, J. M. Laget, J. Langheinrich, D. Lawrence, T. Lee, K. Livingston, H. Y. Lu, N. Markov, P. Mattione, M. Mazouz, B. McKinnon, B. A. Mecking, M. D. Mestayer, C. A. Meyer, T. Mibe, B. Michel, K. Mikhailov, M. Mirazita, R. Miskimen, V. Mokeev, K. Moriya, S. A. Morrow, M. Moteabbed, E. Munevar, G. S. Mutchler, P. Nadel-Turonski, R. Nasseripour, G. Niculescu, I. Niculescu, B. B. Niczyporuk, M. R. Niroula, M. Nozar, M. Osipenko, A. I. Ostrovidov, K. Park, E. Pasyuk, C. Paterson, S. Anefalos Pereira, J. Pierce, N. Pivnyuk, D. Pocanic, S. Pozdniakov, J. W. Price, S. Procureur, Y. Prok, D. Protopopescu, B. A. Raue, G. Ricco, M. Ripani, Barry Ritchie, G. Rosner, P. Rossi, J. Salamanca, C. Salgado, J. P. Santoro, V. Sapunenko, R. A. Schumacher, V. S. Serov, Y. G. Sharabian, D. Sharov, N. V. Shvedunov, E. S. Smith, L. C. Smith, D. I. Sober, D. Sokhan, A. Stavinsky, S. S. Stepanyan, B. E. Stokes, I. I. Strakovsky, S. Strauch, M. Taiuti, D. J. Tedeschi, A. Tkabladze, S. Tkachenko, C. Tur, M. F. Vineyard, A. V. Vlassov, E. Voutier, D. P. Watts, L. B. Weinstein, D. P. Weygand, M. Williams, E. Wolin, M. H. Wood, A. Yegneswaran, L. Zana, J. Zhang, Z. W. Zhao

Research output: Contribution to journal › Article › peer-review

192 Scopus citations

Abstract

The beam-spin asymmetries in the hard exclusive electroproduction of photons on the proton (e→p→epγ) 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 (xB from 0.11 to 0.58, Q2 from 1 to 4.8GeV2, -t from 0.09 to 1.8GeV2), the azimuthal dependence of the asymmetries is compatible with expectations from leading-twist dominance, Aasin/(1+ccos). This extensive set of data can thus be used to constrain significantly the generalized parton distributions of the nucleon in the valence quark sector.

Original language	English (US)
Article number	162002
Journal	Physical Review Letters
Volume	100
Issue number	16
DOIs	https://doi.org/10.1103/PhysRevLett.100.162002
State	Published - Apr 23 2008

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1103/PhysRevLett.100.162002

Cite this

Girod, F. X., Niyazov, R. A., Avakian, H., Ball, J., Bedlinskiy, I., Burkert, V. D., De Masi, R., Elouadrhiri, L., Garçon, M., Guidal, M., Jo, H. S., Joo, K., Kubarovsky, V., Kuleshov, S. V., MacCormick, M., Niccolai, S., Pogorelko, O., Sabatié, F., Stepanyan, S., ... Zhao, Z. W. (2008). Measurement of deeply virtual compton scattering beam-spin asymmetries. Physical Review Letters, 100(16), [162002]. https://doi.org/10.1103/PhysRevLett.100.162002

Girod, FX, Niyazov, RA, Avakian, H, Ball, J, Bedlinskiy, I, Burkert, VD, De Masi, R, Elouadrhiri, L, Garçon, M, Guidal, M, Jo, HS, Joo, K, Kubarovsky, V, Kuleshov, SV, MacCormick, M, Niccolai, S, Pogorelko, O, Sabatié, F, Stepanyan, S, Stoler, P, Ungaro, M, Zhao, B, Amaryan, MJ, Ambrozewicz, P, Anghinolfi, M, Asryan, G, Bagdasaryan, H, Baillie, N, Ball, JP, Baltzell, NA, Batourine, V, Battaglieri, M, Bellis, M, Benmouna, N, Berman, BL, Biselli, AS, Blaszczyk, L, Bouchigny, S, Boiarinov, S, Bradford, R, Branford, D, Briscoe, WJ, Brooks, WK, Bültmann, S, Butuceanu, C, Calarco, JR, Careccia, SL, Carman, DS, Casey, L, Chen, S, Cheng, L, Cole, PL, Collins, P, Coltharp, P, Crabb, D, Crede, V, Dashyan, N, De Sanctis, E, De Vita, R, Degtyarenko, PV, Deur, A, Dharmawardane, KV, Dickson, R, Djalali, C, Dodge, GE, Donnelly, J, Doughty, D, Dugger, M, Dzyubak, OP, Egiyan, H, Egiyan, KS, El Fassi, L, Eugenio, P, Fedotov, G, Feldman, G, Funsten, H, Gavalian, G, Gilfoyle, GP, Giovanetti, KL, Goetz, JT, Gonenc, A, Gothe, RW, Griffioen, KA, Guler, N, Guo, L, Gyurjyan, V, Hafidi, K, Hakobyan, H, Hanretty, C, Hersman, FW, Hicks, K, Hleiqawi, I, Holtrop, M, Hyde, CE, Ilieva, Y, Ireland, DG, Ishkhanov, BS, Isupov, EL, Ito, MM, Jenkins, D, Johnstone, JR, Juengst, HG, Kalantarians, N, Kellie, JD, Khandaker, M, Kim, W, Klein, A, Klein, FJ, Klimenko, AV, Kossov, M, Krahn, Z, Kramer, LH, Kuhn, J, Kuhn, SE, Lachniet, J, Laget, JM, Langheinrich, J, Lawrence, D, Lee, T, Livingston, K, Lu, HY, Markov, N, Mattione, P, Mazouz, M, McKinnon, B, Mecking, BA, Mestayer, MD, Meyer, CA, Mibe, T, Michel, B, Mikhailov, K, Mirazita, M, Miskimen, R, Mokeev, V, Moriya, K, Morrow, SA, Moteabbed, M, Munevar, E, Mutchler, GS, Nadel-Turonski, P, Nasseripour, R, Niculescu, G, Niculescu, I, Niczyporuk, BB, Niroula, MR, Nozar, M, Osipenko, M, Ostrovidov, AI, Park, K, Pasyuk, E, Paterson, C, Anefalos Pereira, S, Pierce, J, Pivnyuk, N, Pocanic, D, Pozdniakov, S, Price, JW, Procureur, S, Prok, Y, Protopopescu, D, Raue, BA, Ricco, G, Ripani, M, Ritchie, B, Rosner, G, Rossi, P, Salamanca, J, Salgado, C, Santoro, JP, Sapunenko, V, Schumacher, RA, Serov, VS, Sharabian, YG, Sharov, D, Shvedunov, NV, Smith, ES, Smith, LC, Sober, DI, Sokhan, D, Stavinsky, A, Stepanyan, SS, Stokes, BE, Strakovsky, II, Strauch, S, Taiuti, M, Tedeschi, DJ, Tkabladze, A, Tkachenko, S, Tur, C, Vineyard, MF, Vlassov, AV, Voutier, E, Watts, DP, Weinstein, LB, Weygand, DP, Williams, M, Wolin, E, Wood, MH, Yegneswaran, A, Zana, L, Zhang, J & Zhao, ZW 2008, 'Measurement of deeply virtual compton scattering beam-spin asymmetries', Physical Review Letters, vol. 100, no. 16, 162002. https://doi.org/10.1103/PhysRevLett.100.162002

@article{346f4de970d24a3cb58db9f39588e0e0,

title = "Measurement of deeply virtual compton scattering beam-spin asymmetries",

abstract = "The beam-spin asymmetries in the hard exclusive electroproduction of photons on the proton (e→p→epγ) 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 (xB from 0.11 to 0.58, Q2 from 1 to 4.8GeV2, -t from 0.09 to 1.8GeV2), the azimuthal dependence of the asymmetries is compatible with expectations from leading-twist dominance, Aasin/(1+ccos). This extensive set of data can thus be used to constrain significantly the generalized parton distributions of the nucleon in the valence quark sector.",

author = "Girod, {F. X.} and Niyazov, {R. A.} and H. Avakian and J. Ball and I. Bedlinskiy and Burkert, {V. D.} and {De Masi}, R. and L. Elouadrhiri and M. Gar{\c c}on and M. Guidal and Jo, {H. S.} and K. Joo and V. Kubarovsky and Kuleshov, {S. V.} and M. MacCormick and S. Niccolai and O. Pogorelko and F. Sabati{\'e} and S. Stepanyan and P. Stoler and M. Ungaro and B. Zhao and Amaryan, {M. J.} and P. Ambrozewicz and M. Anghinolfi and G. Asryan and H. Bagdasaryan and N. Baillie and Ball, {J. P.} and Baltzell, {N. A.} and V. Batourine and M. Battaglieri and M. Bellis and N. Benmouna and Berman, {B. L.} and Biselli, {A. S.} and L. Blaszczyk and S. Bouchigny and S. Boiarinov and R. Bradford and D. Branford and Briscoe, {W. J.} and Brooks, {W. K.} and S. B{\"u}ltmann and C. Butuceanu and Calarco, {J. R.} and Careccia, {S. L.} and Carman, {D. S.} and L. Casey and S. Chen and L. Cheng and Cole, {P. L.} and P. Collins and P. Coltharp and D. Crabb and V. Crede and N. Dashyan and {De Sanctis}, E. and {De Vita}, R. and Degtyarenko, {P. V.} and A. Deur and Dharmawardane, {K. V.} and R. Dickson and C. Djalali and Dodge, {G. E.} and J. Donnelly and D. Doughty and Michael Dugger and Dzyubak, {O. P.} and H. Egiyan and Egiyan, {K. S.} and {El Fassi}, L. and P. Eugenio and G. Fedotov and G. Feldman and H. Funsten and G. Gavalian and Gilfoyle, {G. P.} and Giovanetti, {K. L.} and Goetz, {J. T.} and A. Gonenc and Gothe, {R. W.} and Griffioen, {K. A.} and N. Guler and L. Guo and V. Gyurjyan and K. Hafidi and H. Hakobyan and C. Hanretty and Hersman, {F. W.} and K. Hicks and I. Hleiqawi and M. Holtrop and Hyde, {C. E.} and Y. Ilieva and Ireland, {D. G.} and Ishkhanov, {B. S.} and Isupov, {E. L.} and Ito, {M. M.} and D. Jenkins and Johnstone, {J. R.} and Juengst, {H. G.} and N. Kalantarians and Kellie, {J. D.} and M. Khandaker and W. Kim and A. Klein and Klein, {F. J.} and Klimenko, {A. V.} and M. Kossov and Z. Krahn and Kramer, {L. H.} and J. Kuhn and Kuhn, {S. E.} and J. Lachniet and Laget, {J. M.} and J. Langheinrich and D. Lawrence and T. Lee and K. Livingston and Lu, {H. Y.} and N. Markov and P. Mattione and M. Mazouz and B. McKinnon and Mecking, {B. A.} and Mestayer, {M. D.} and Meyer, {C. A.} and T. Mibe and B. Michel and K. Mikhailov and M. Mirazita and R. Miskimen and V. Mokeev and K. Moriya and Morrow, {S. A.} and M. Moteabbed and E. Munevar and Mutchler, {G. S.} and P. Nadel-Turonski and R. Nasseripour and G. Niculescu and I. Niculescu and Niczyporuk, {B. B.} and Niroula, {M. R.} and M. Nozar and M. Osipenko and Ostrovidov, {A. I.} and K. Park and E. Pasyuk and C. Paterson and {Anefalos Pereira}, S. and J. Pierce and N. Pivnyuk and D. Pocanic and S. Pozdniakov and Price, {J. W.} and S. Procureur and Y. Prok and D. Protopopescu and Raue, {B. A.} and G. Ricco and M. Ripani and Barry Ritchie and G. Rosner and P. Rossi and J. Salamanca and C. Salgado and Santoro, {J. P.} and V. Sapunenko and Schumacher, {R. A.} and Serov, {V. S.} and Sharabian, {Y. G.} and D. Sharov and Shvedunov, {N. V.} and Smith, {E. S.} and Smith, {L. C.} and Sober, {D. I.} and D. Sokhan and A. Stavinsky and Stepanyan, {S. S.} and Stokes, {B. E.} and Strakovsky, {I. I.} and S. Strauch and M. Taiuti and Tedeschi, {D. J.} and A. Tkabladze and S. Tkachenko and C. Tur and Vineyard, {M. F.} and Vlassov, {A. V.} and E. Voutier and Watts, {D. P.} and Weinstein, {L. B.} and Weygand, {D. P.} and M. Williams and E. Wolin and Wood, {M. H.} and A. Yegneswaran and L. Zana and J. Zhang and Zhao, {Z. W.}",

year = "2008",

month = apr,

day = "23",

doi = "10.1103/PhysRevLett.100.162002",

language = "English (US)",

volume = "100",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "16",

}

TY - JOUR

T1 - Measurement of deeply virtual compton scattering beam-spin asymmetries

AU - Girod, F. X.

AU - Niyazov, R. A.

AU - Avakian, H.

AU - Ball, J.

AU - Bedlinskiy, I.

AU - Burkert, V. D.

AU - De Masi, R.

AU - Elouadrhiri, L.

AU - Garçon, M.

AU - Guidal, M.

AU - Jo, H. S.

AU - Joo, K.

AU - Kubarovsky, V.

AU - Kuleshov, S. V.

AU - MacCormick, M.

AU - Niccolai, S.

AU - Pogorelko, O.

AU - Sabatié, F.

AU - Stepanyan, S.

AU - Stoler, P.

AU - Ungaro, M.

AU - Zhao, B.

AU - Amaryan, M. J.

AU - Ambrozewicz, P.

AU - Anghinolfi, M.

AU - Asryan, G.

AU - Bagdasaryan, H.

AU - Baillie, N.

AU - Ball, J. P.

AU - Baltzell, N. A.

AU - Batourine, V.

AU - Battaglieri, M.

AU - Bellis, M.

AU - Benmouna, N.

AU - Berman, B. L.

AU - Biselli, A. S.

AU - Blaszczyk, L.

AU - Bouchigny, S.

AU - Boiarinov, S.

AU - Bradford, R.

AU - Branford, D.

AU - Briscoe, W. J.

AU - Brooks, W. K.

AU - Bültmann, S.

AU - Butuceanu, C.

AU - Calarco, J. R.

AU - Careccia, S. L.

AU - Carman, D. S.

AU - Casey, L.

AU - Chen, S.

AU - Cheng, L.

AU - Cole, P. L.

AU - Collins, P.

AU - Coltharp, P.

AU - Crabb, D.

AU - Crede, V.

AU - Dashyan, N.

AU - De Sanctis, E.

AU - De Vita, R.

AU - Degtyarenko, P. V.

AU - Deur, A.

AU - Dharmawardane, K. V.

AU - Dickson, R.

AU - Djalali, C.

AU - Dodge, G. E.

AU - Donnelly, J.

AU - Doughty, D.

AU - Dugger, Michael

AU - Dzyubak, O. P.

AU - Egiyan, H.

AU - Egiyan, K. S.

AU - El Fassi, L.

AU - Eugenio, P.

AU - Fedotov, G.

AU - Feldman, G.

AU - Funsten, H.

AU - Gavalian, G.

AU - Gilfoyle, G. P.

AU - Giovanetti, K. L.

AU - Goetz, J. T.

AU - Gonenc, A.

AU - Gothe, R. W.

AU - Griffioen, K. A.

AU - Guler, N.

AU - Guo, L.

AU - Gyurjyan, V.

AU - Hafidi, K.

AU - Hakobyan, H.

AU - Hanretty, C.

AU - Hersman, F. W.

AU - Hicks, K.

AU - Hleiqawi, I.

AU - Holtrop, M.

AU - Hyde, C. E.

AU - Ilieva, Y.

AU - Ireland, D. G.

AU - Ishkhanov, B. S.

AU - Isupov, E. L.

AU - Ito, M. M.

AU - Jenkins, D.

AU - Johnstone, J. R.

AU - Juengst, H. G.

AU - Kalantarians, N.

AU - Kellie, J. D.

AU - Khandaker, M.

AU - Kim, W.

AU - Klein, A.

AU - Klein, F. J.

AU - Klimenko, A. V.

AU - Kossov, M.

AU - Krahn, Z.

AU - Kramer, L. H.

AU - Kuhn, J.

AU - Kuhn, S. E.

AU - Lachniet, J.

AU - Laget, J. M.

AU - Langheinrich, J.

AU - Lawrence, D.

AU - Lee, T.

AU - Livingston, K.

AU - Lu, H. Y.

AU - Markov, N.

AU - Mattione, P.

AU - Mazouz, M.

AU - McKinnon, B.

AU - Mecking, B. A.

AU - Mestayer, M. D.

AU - Meyer, C. A.

AU - Mibe, T.

AU - Michel, B.

AU - Mikhailov, K.

AU - Mirazita, M.

AU - Miskimen, R.

AU - Mokeev, V.

AU - Moriya, K.

AU - Morrow, S. A.

AU - Moteabbed, M.

AU - Munevar, E.

AU - Mutchler, G. S.

AU - Nadel-Turonski, P.

AU - Nasseripour, R.

AU - Niculescu, G.

AU - Niculescu, I.

AU - Niczyporuk, B. B.

AU - Niroula, M. R.

AU - Nozar, M.

AU - Osipenko, M.

AU - Ostrovidov, A. I.

AU - Park, K.

AU - Pasyuk, E.

AU - Paterson, C.

AU - Anefalos Pereira, S.

AU - Pierce, J.

AU - Pivnyuk, N.

AU - Pocanic, D.

AU - Pozdniakov, S.

AU - Price, J. W.

AU - Procureur, S.

AU - Prok, Y.

AU - Protopopescu, D.

AU - Raue, B. A.

AU - Ricco, G.

AU - Ripani, M.

AU - Ritchie, Barry

AU - Rosner, G.

AU - Rossi, P.

AU - Salamanca, J.

AU - Salgado, C.

AU - Santoro, J. P.

AU - Sapunenko, V.

AU - Schumacher, R. A.

AU - Serov, V. S.

AU - Sharabian, Y. G.

AU - Sharov, D.

AU - Shvedunov, N. V.

AU - Smith, E. S.

AU - Smith, L. C.

AU - Sober, D. I.

AU - Sokhan, D.

AU - Stavinsky, A.

AU - Stepanyan, S. S.

AU - Stokes, B. E.

AU - Strakovsky, I. I.

AU - Strauch, S.

AU - Taiuti, M.

AU - Tedeschi, D. J.

AU - Tkabladze, A.

AU - Tkachenko, S.

AU - Tur, C.

AU - Vineyard, M. F.

AU - Vlassov, A. V.

AU - Voutier, E.

AU - Watts, D. P.

AU - Weinstein, L. B.

AU - Weygand, D. P.

AU - Williams, M.

AU - Wolin, E.

AU - Wood, M. H.

AU - Yegneswaran, A.

AU - Zana, L.

AU - Zhang, J.

AU - Zhao, Z. W.

PY - 2008/4/23

Y1 - 2008/4/23

N2 - The beam-spin asymmetries in the hard exclusive electroproduction of photons on the proton (e→p→epγ) 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 (xB from 0.11 to 0.58, Q2 from 1 to 4.8GeV2, -t from 0.09 to 1.8GeV2), the azimuthal dependence of the asymmetries is compatible with expectations from leading-twist dominance, Aasin/(1+ccos). This extensive set of data can thus be used to constrain significantly the generalized parton distributions of the nucleon in the valence quark sector.

AB - The beam-spin asymmetries in the hard exclusive electroproduction of photons on the proton (e→p→epγ) 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 (xB from 0.11 to 0.58, Q2 from 1 to 4.8GeV2, -t from 0.09 to 1.8GeV2), the azimuthal dependence of the asymmetries is compatible with expectations from leading-twist dominance, Aasin/(1+ccos). This extensive set of data can thus be used to constrain significantly the generalized parton distributions of the nucleon in the valence quark sector.

UR - http://www.scopus.com/inward/record.url?scp=42549113355&partnerID=8YFLogxK

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U2 - 10.1103/PhysRevLett.100.162002

DO - 10.1103/PhysRevLett.100.162002

M3 - Article

AN - SCOPUS:42549113355

VL - 100

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 16

M1 - 162002

ER -

Measurement of deeply virtual compton scattering beam-spin asymmetries

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