Measurement Of Deeply Virtual Compton Scattering With A Polarized-Proton Target Chen S , Avakian H , Burkert V D , Eugenio P , Adams G , Amarian M , Ambrozewicz P , Anghinolfi M , Asryan G , Bagdasaryan H , Baillie N , Ball J P , Baltzell N A , Barrow S , Batourine V , Battaglieri M , Beard K , Bedlinskiy I , Bektasoglu M , Bellis M , Benmouna N , Berman B L , Biselli A S , Bonner B E , Bouchigny S , Boiarinov S , Bosted P , Bradford R , Branford D , Briscoe W J , Brooks W K , Bültmann S , Butuceanu C , Calarco J R , Careccia S L , Carman D S , Carnahan B , Cazes A , Cole P L , Collins P , Coltharp P , Cords D , Corvisiero P , Crabb D , Crannell H , Crede V , Cummings J P , DeMasi R , DeVita R , De Sanctis E , Degtyarenko P V , Denizli H , Dennis L , Deur A , Dharmawardane K V , Dhuga K S , Djalali C , Dodge G E , Donnelly J , Doughty D , Dugger M , Dytman S , Dzyubak O P , Egiyan H , Egiyan K S , El Fassi L , Elouadrhiri L , Fatemi R , Fedotov G , Feldman G , Feuerbach R J , Forest T A , Funsten H , Garçon M , Gavalian G , Gilfoyle G P , Giovanetti K L , Girod F X , Goetz J T , Golovatch E , Gonenc A , Gothe R W , Griffioen K A , Guidal M , Guillo M , Guler N , Guo L , Gyurjyan V , Hadjidakis C , Hafidi K , Hakobyan H , Hakobyan R S , Hardie J , Heddle D , Hersman F W , Hicks K , Hleiqawi I , Holtrop M , Huertas M , Hyde-Wright C E , Ilieva Y , Ireland D G , Ishkhanov B S , Isupov E L , Ito M M , Jenkins D , Jo H S , Joo K , Juengst H G , Keith C , Kellie J D , Khandaker M , Kim K Y , Kim K , Kim W , Klein A , Klein F J , Klusman M , Kossov M , Kramer L H , Kubarovsky V , Kuhn J , Kuhn S E , Kuleshov S V , Lachniet J , Laget J M , Langheinrich J , Lawrence D , Li Ji , Lima A C S , Livingston K , Lu H , Lukashin K , MacCormick M , Markov N , McAleer S , McKinnon B , McNabb J W C , Mecking B A , Mestayer M D , Meyer C A , Mibe T , Mikhailov K , Minehart R , Mirazita M , Miskimen R , Mokeev V , Morand L , Morrow S A , Moteabbed M , Mueller J , Mutchler G S , Nadel-Turonski P , Napolitano J , Nasseripour R , Natasha N , Niccolai S , Niculescu G , Niculescu I , Niczyporuk B B , Niroula M R , Niyazov R A , Nozar M , O'Rielly G V , Osipenko M , Ostrovidov A I , Park K , Pasyuk E , Paterson C , Philips S A , Pierce J , Pivnyuk N , Pocanic D , Pogorelko O , Polli E , Popa I , Pozdniakov S , Preedom B M , Price J W , Prok Y , Protopopescu D , Qin L M , Raue B A , Riccardi G , Ricco G , Ripani M , Ritchie B G , Ronchetti F , Rosner G , Rossi P , Rowntree D , Rubin P D , Sabatié F , Salgado C , Santoro J P , Sapunenko V , Schumacher R A , Serov V S , Sharabian Y G , Shaw J , Shvedunov N V , Skabelin A V , Smith E S , Smith L C , Sober D I , Stavinsky A , Stepanyan S S , Stepanyan S , Stokes B E , Stoler P , Strakovsky I I , Strauch S , Suleiman R , Taiuti M , Tedeschi D J , Thoma U , Tkabladze A , Tkachenko S , Todor L , Tur C , Ungaro M , Vanderhaeghen M , Vineyard M F , Vlassov A V , Watts D P , Weinstein L B , Weygand D P , Williams M , Wolin E , Wood M H , Yegneswaran A , Yun J , Zana L , Zhang J , Zhao B , Zhao Z , Null Null PHYSICAL REVIEW LETTERS（2006）
摘要
The longitudinal target-spin asymmetry A(UL) for the exclusive electroproduction of high-energy photons was measured for the first time in ep -> e(')p gamma. The data have been accumulated at JLab with the CLAS spectrometer using 5.7 GeV electrons and a longitudinally polarized NH3 target. A significant azimuthal angular dependence was observed, resulting from the interference of the deeply virtual Compton scattering and Bethe-Heitler processes. The amplitude of the sin phi moment is 0.252 +/- 0.042(stat)+/- 0.020(sys). Theoretical calculations are in good agreement with the magnitude and the kinematic dependence of the target-spin asymmetry, which is sensitive to the generalized parton distributions (H) over tilde and H.
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nuclear theory, electron beam, monte carlo
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