Failure of the collinear expansion in the calculation of the induced gluon emission

被引：11
作者：
Aurenche, P. [1 ]
Zakharov, B. G. [2 ]
Zaraket, H. [3 ]
机构：
[1] Lab Annecy Le Vieux Phys Theor, F-74941 Annecy Le Vieux, France
[2] Russian Acad Sci, LD Landau Theoret Phys Inst, GSP 1, Moscow 117334, Russia
[3] Lebanese Univ, Fac Sci 1, Beirut, Lebanon
来源：
JETP LETTERS | 2008年 / 87卷 / 11期
基金：
俄罗斯基础研究基金会;
关键词：
D O I：
10.1134/S0021364008110039
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The collinear expansion is demonstrated to fail in the case of the gluon emission from a fast quark produced in eA deep inelastic scattering. In this approximation, the N = 1 rescattering contribution to the gluon spectrum vanishes. It has been shown that the higher-twist approach by X. N. Wang and X. Guo, Nucl. Phys. A 696, 788 (2001) and B.W. Zhang and X.N. Wang, Nuel. Phys. A 720, 429 (2003) based on the collinear expansion is wrong. The nonzero gluon spectrum obtained in those works is a consequence of an unjustified neglect of some important terms in the collinear expansion.
引用
收藏
页码：605 / 610
页数：6
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