Reduction of one-loop tensor form factors to scaler integrals: a general scheme

被引:45
作者
Devaraj, G [1 ]
Stuart, RG [1 ]
机构
[1] Univ Michigan, Randall Lab Phys, Ann Arbor, MI 48109 USA
关键词
dimensional regularization; tensor form factors; scalar integrals; Gram determinant; kinematic singularities;
D O I
10.1016/S0550-3213(98)00035-2
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
A general method for reducing tensor form factors, which appear in one-loop calculations in dimensional regularization, to scalar integrals is presented. The method is an extension of the reduction scheme introduced by Passarino and Veltman [Nucl. Phys. B 160 (1979) 151] and is applicable in all regions of parameter space including those where the kinematic Gram determinant vanishes. New relations between the form factors that are valid for the vanishing Gram determinant play a key role in the extended scheme. (C) 1998 Elsevier Science B.V.
引用
收藏
页码:483 / 513
页数:31
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