Soft-gluon-pole contribution in single transverse-spin asymmetries of Drell-Yan processes
Soft-gluon-pole contribution in single transverse-spin asymmetries of Drell-Yan processes
复制标题
软胶子极对 Drell-Yan 过程单横向自旋不对称性的贡献
DOI:
10.1007/jhep04(2011)062
复制
发表时间:
2011-02
影响因子:
5.4
通讯作者:
Sang, H. Z.
中科院分区:
文献类型:
--
作者:
Ma, J. P.;Sang, H. Z.
We use multi-parton states to examine the leading order collinear factorization of single transverse-spin asymmetries in Drell-Yan processes. Twist-3 operators are involved in the factorization. We find that the so-called soft-gluon-pole contribution in the factorization must exist in order to make the factorization correct. This contribution comes from the corresponding cross-section at one-loop, while the hard-pole contribution in the factorization comes from the cross-section at tree-level. Although the two contributions come from results at different orders, their perturbative coefficient functions in the factorization are at the same order. This is in contrast to factorizations only involving twist-2 operators. The soft-gluon-pole contribution found in this work is in agreement with that derived in a different way. For the hard-pole contributions we find an extra contribution from an extra part on process contributing to the asymmetries. We also solve apart of discrepancy in evolutions of the twist-3 operator. The method presented here for analyzing the factorization can be generalized to other processes and can be easily used for studying factorizations at higher orders, because the involved calculations are of standard scattering amplitudes.
登录
查看更多内容
影响因子:
3.1
作者:
Cao Hui-Geng;Ma Jian-Ping;Sang Hua-Zheng
通讯作者:
Sang Hua-Zheng
影响因子:
5
作者:
J. Qiu;G. Sterman
通讯作者:
J. Qiu;G. Sterman
影响因子:
8.6
作者:
G. Bodwin;S. Brodsky;G. Lepage
通讯作者:
G. Bodwin;S. Brodsky;G. Lepage
DOI:
10.1016/j.nuclphysb.2006.11.016
发表时间:
2006-10
期刊:
Nuclear Physics
影响因子:
--
作者:
H. Eguchi;Y. Koike;Kazuhiro Tanaka
通讯作者:
H. Eguchi;Y. Koike;Kazuhiro Tanaka
DOI:
10.1016/0550-3213(85)90565-6
发表时间:
1985
期刊:
Nuclear Physics
影响因子:
--
作者:
J. Collins;D. Soper;G. Sterman
通讯作者:
J. Collins;D. Soper;G. Sterman