A NEW METHOD FOR HELICITY CALCULATIONS

被引：79

作者：

BALLESTRERO, A ^{[1
]}

MAINA, E ^{[1
]}

机构：

[1] IST NAZL FIS NUCL,SEZ TORINO,I-10125 TURIN,ITALY

来源：

PHYSICS LETTERS B | 1995年 / 350卷 / 02期

关键词：

D O I：

10.1016/0370-2693(95)00351-K

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We propose a new helicity formalism based on the insertion in spinor lines of a complete set of states built up with appropriate unphysical spinors, which are eigenstates of ($) over bar p, where p is the momentum flowing in a fermion propagator. The corresponding eigenvalues can be real (p(2) > 0) or imaginary (p(2) < 0). The method is developed both for massless and massive fermions for which it turns out to be particularly fast. All relevant formulae are given.

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页码：225 / 233

页数：9

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