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arXiv 0810.5007hep-ex
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非极化质子靶上深度虚康普顿散射的方位不对称性

Azimuthal asymmetries in Deeply Virtual Compton Scattering on an unpolarized proton target

Dietmar Zeiler

摘要:

本文介绍了在HERMES实验上测量的非极化氢靶上产生的真实光子的方位角不对称性的初步结果。采用不同的光束电荷和螺旋度的数据的分析允许同时提取源自干涉项和平方DVCS幅度的不对称性。得到了束流电荷不对称性的一阶余弦矩和束流自旋不对称性的一阶正弦矩的较大的不对称幅度,并与不同的理论计算结果进行了比较。

英文摘要:

Preliminary results on azimuthal asymmetries in leptoproduction of real photons on an unpolarized hydrogen target measured at the HERMES experiment are presented. The analysis of data taken with different beam charges and helicities allows for a simultaneous extraction of asymmetries originating from the interference term and the squared DVCS amplitude. Sizeable asymmetry amplitudes for the first cosine moment of the beam-charge asymmetry and the first sine moment of the beam-spin asymmetry have been found. The results are compared to different theoretical calculations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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