NUK - logo
E-viri
Recenzirano
  • First Exclusive Measurement of Deeply Virtual Compton Scattering off ^{4}He: Toward the 3D Tomography of Nuclei
    Hattawy, M; Baltzell, N A; Hafidi, K; Stepanyan, S; De Vita, R; Egiyan, H; Liuti, S; Perrin, Y; Voutier, E; Adikaram, D; Akbar, Z; Armstrong, Whitney R; Avakian, H; Ball, J; Bashkanov, M; Battaglieri, M; Bedlinskiy, I; Briscoe, W J; Burkert, V D; Thanh Cao, Frank; Carman, D S; Charles, G; Chetry, T; Clark, L; Cole, P L; Contalbrigo, M; Cortes, O; Crede, V; D'Angelo, A; De Sanctis, E; Deur, A; Djalali, C; Elouadrhiri, L; Eugenio, P; Fersch, R; Fleming, J A; Garçon, M; Gevorgyan, N; Gilfoyle, G P; Gleason, C; Gothe, R W; Harrison, N; Heddle, D; Hicks, K; Holtrop, M; Hughes, S M; Ireland, D G; Ishkhanov, B S; Isupov, E L; Jiang, H; Joo, K; Joosten, S; Khachatryan, G; Khachatryan, M; Khandaker, M; Kim, A; Kim, W; Klein, A; Klein, F J; Kuhn, S E; Kuleshov, S V; Lanza, L; Lenisa, P; Lu, H Y; MacGregor, I J D; Markov, N; Mayer, M; McCracken, M E; Meyer, C A; Meziani, Z E; Mirazita, M; Movsisyan, A; Munoz Camacho, C; Nadel-Turonski, P; Net, L A; Niculescu, G; Osipenko, M; Paolone, M; Park, K; Phelps, E; Phelps, W; Pisano, S; Pogorelko, O; Price, J W; Rossi, P; Salgado, C; Schumacher, R A; Seder, E; Sharabian, Y G; Simonyan, A; Smith, G D; Sokhan, D; Sparveris, N; Strauch, S; Taiuti, M; Voskanyan, H; Walford, N K; Wood, M H; Zachariou, N; Zhao, Z W

    Physical review letters, 2017-Nov-17, 20171117, Letnik: 119, Številka: 20
    Journal Article

    We report on the first measurement of the beam-spin asymmetry in the exclusive process of coherent deeply virtual Compton scattering off a nucleus. The experiment uses the 6 GeV electron beam from the Continuous Electron Beam Accelerator Facility (CEBAF) accelerator at Jefferson Lab incident on a pressurized ^{4}He gaseous target placed in front of the CEBAF Large Acceptance Spectrometer (CLAS). The scattered electron is detected by CLAS and the photon by a dedicated electromagnetic calorimeter at forward angles. To ensure the exclusivity of the process, a specially designed radial time projection chamber is used to detect the recoiling ^{4}He nuclei. We measure beam-spin asymmetries larger than those observed on the free proton in the same kinematic domain. From these, we are able to extract, in a model-independent way, the real and imaginary parts of the only ^{4}He Compton form factor, H_{A}. This first measurement of coherent deeply virtual Compton scattering on the ^{4}He nucleus, with a fully exclusive final state via nuclear recoil tagging, leads the way toward 3D imaging of the partonic structure of nuclei.

Vnos na polico