纵向极化氘靶上深度虚康普顿散射相关方位角不对称性的测量
高能物理 - 实验
2011-05-03 v2
摘要
在纵向极化氘靶上，分别针对仅靶极化以及靶极化与束流螺旋性和/或束流电荷组合的情况，测量了从靶上出射的实光子独占电产生过程中的方位角不对称性。这些不对称性出现在实光子相对于轻子散射平面、围绕虚光子方向的方位角的分布中。这些不对称性源于深度虚康普顿散射过程及其与贝特-海特勒过程的干涉。结果表明，来自矢量极化为零的张量极化氘靶的束流电荷和束流螺旋性不对称性与来自非极化氘靶的结果一致，这符合在较大动量转移下非相干散射占主导的预期。此外，发现单靶自旋不对称性和双自旋不对称性的结果与先前在氢靶上测量的相应不对称性一致。对于靶上动量转移较小的氘核相干散射，这些发现意味着张量对截面的贡献很小。此外，发现张量不对称性与零一致。
引用
@article{arxiv.1008.3996,
title = {Measurement of azimuthal asymmetries associated with deeply virtual Compton scattering on a longitudinally polarized deuterium target},
author = {The HERMES Collaboration and A. Airapetian and N. Akopov and Z. Akopov and E. C. Aschenauer and W. Augustyniak and R. Avakian and A. Avetissian and E. Avetisyan and S. Belostotski and N. Bianchi and H. P. Blok and A. Borissov and J. Bowles and I. Brodski and V. Bryzgalov and J. Burns and M. Capiluppi and G. P. Capitani and E. Cisbani and G. Ciullo and M. Contalbrigo and P. F. Dalpiaz and W. Deconinck and R. De Leo and L. De Nardo and E. De Sanctis and M. Diefenthaler and P. Di Nezza and M. Dueren and M. Ehrenfried and G. Elbakian and F. Ellinghaus and A. Fantoni and L. Felawka and S. Frullani and D. Gabbert and G. Gapienko and V. Gapienko and F. Garibaldi and G. Gavrilov and V. Gharibyan and F. Giordano and S. Gliske and M. Golembiovskaya and C. Hadjidakis and M. Hartig and D. Hasch and G. Hill and A. Hillenbrand and M. Hoek and Y. Holler and I. Hristova and Y. Imazu and A. Ivanilov and H. E. Jackson and A. Jgoun and H. S. Jo and S. Joosten and R. Kaiser and G. Karyan and T. Keri and E. Kinney and A. Kisselev and N. Kobayashi and V. Korotkov and V. Kozlov and B. Krauss and P. Kravchenko and V. G. Krivokhijine and L. Lagamba and R. Lamb and L. Lapikas and I. Lehmann and P. Lenisa and L. A. Linden-Levy and A. Lopez Ruiz and W. Lorenzon and X. -G. Lu and X. -R. Lu and B. -Q. Ma and D. Mahon and N. C. R. Makins and S. I. Manaenkov and L. Manfre and Y. Mao and B. Marianski and A. Martinez de la Ossa and H. Marukyan and C. A. Miller and A. Movsisyan and V. Muccifora and M. Murray and D. Mueller and A. Mussgiller and E. Nappi and Y. Naryshkin and A. Nass and M. Negodaev and W. -D. Nowak and L. L. Pappalardo and R. Perez-Benito and N. Pickert and M. Raithel and P. E. Reimer and A. R. Reolon and C. Riedl and K. Rith and G. Rosner and A. Rostomyan and J. Rubin and D. Ryckbosch and Y. Salomatin and F. Sanftl and A. Schaefer and G. Schnell and K. P. Schueler and B. Seitz and T. -A. Shibata and V. Shutov and M. Stancari and M. Statera and E. Steffens and J. J. M. Steijger and H. Stenzel and J. Stewart and F. Stinzing and S. Taroian and A. Terkulov and A. Trzcinski and M. Tytgat and A. Vandenbroucke and P. B. Van der Nat and Y. Van Haarlem and C. Van Hulse and D. Veretennikov and V. Vikhrov and I. Vilardi and C. Vogel and S. Wang and S. Yaschenko and Z. Ye and S. Yen and W. Yu and D. Zeiler and B. Zihlmann and P. Zupranski},
journal= {arXiv preprint arXiv:1008.3996},
year = {2011}
}
备注
33 pages, 7 figures, 7 tables; minor textual changes on pages 5 and 27, additional Table 2 added on page 10