Light-cone singularities and transverse-momentum-dependent factorization at twist-3
Light-cone singularities and transverse-momentum-dependent factorization at twist-3
复制标题
光锥奇点和扭曲 3 处的横向动量相关分解
DOI:
10.1016/j.physletb.2017.03.015
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发表时间:
2016-10
影响因子:
4.4
通讯作者:
Ma J. P.
中科院分区:
文献类型:
--
作者:
Chen A. P.;Ma J. P.
We study transverse-momentum-dependent factorization at twist-3 for Drell–Yan processes. The factorization can be derived straightforwardly at leading order of α s. But at this order we find that light-cone singularities already exist and effects of soft gluons are not correctly factorized. We regularize the singularities with gauge links off the light-cone and introduce a soft factor to factorize the effects of soft gluons. Interestingly, the soft factor must be included in the definition of subtracted TMD parton distributions to correctly factorize the effects of soft gluons. We derive the Collins–Soper equation for one of twist-3 TMD parton distributions. The equation can be useful for resummation of large logarithms terms appearing in the corresponding structure function in collinear factorization. However, the derived equation is nonhomogeneous. This will make the resummation complicated.
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DOI:
10.1103/physrevd.84.114004
发表时间:
2011-09
期刊:
Physical Review D - Particles, Fields, Gravitation and Cosmology
影响因子:
--
作者:
Lu Zhun;Schmidt Ivan
通讯作者:
Schmidt Ivan
影响因子:
4.4
作者:
E. Berger;J. Qiu;Ricardo A. Rodriguez-Pedraza
通讯作者:
E. Berger;J. Qiu;Ricardo A. Rodriguez-Pedraza
影响因子:
5.4
作者:
M. G. Echevarria;Ahmad Idilbi;I. Scimemi
通讯作者:
M. G. Echevarria;Ahmad Idilbi;I. Scimemi
影响因子:
4.4
作者:
K. Goeke;A. Metz;M. Schlegel
通讯作者:
K. Goeke;A. Metz;M. Schlegel
影响因子:
5
作者:
J. Collins;T. Rogers
通讯作者:
J. Collins;T. Rogers