Recent results on Deeply Virtual Compton Scattering at HERMES

被引：1
作者：
Marukyan, H. [1 ]
机构：
[1] Yerevan Phys Inst, Yerevan 375036, Armenia
来源：
NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS | 2007年 / 174卷
关键词：
D O I：
10.1016/j.nuclphysbps.2007.08.078
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
HERMES has measured azimuthal asymmetries in the hard electroproduction of real photons, the so-called Deeply Virtual Compton Scattering (DVCS) process, using 27.6 GeV HERA positron and electron beams and various polarized and unpolarized gaseous targets. New results have recently been obtained for the t, x and Q(2) dependencies of the transverse target-spin asymmetry (TTSA) from data accumulated in 2002-2004 with the positron beam and a transversely polarized hydrogen target. A model-dependent constraint on the total angular momentum carried by u- and cl-quarks, J(u) and J(d), is obtained by comparing the extracted TTSA amplitude with theoretical predictions based on a certain GPD model.
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页码：19 / 22
页数：4
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