STABLE CALCULATIONS FOR UNSTABLE PARTICLES - RESTORING GAUGE-INVARIANCE

被引：141
|
作者：
ARGYRES, EN
BEENAKKER, W
JANVANOLDENBORGH, G
DENNER, A
DITTMAIER, S
HOOGLAND, J
KLEISS, R
PAPADOPOULOS, CG
PASSARINO, G
机构：
[1] LEIDEN UNIV, INST LORENTZ, LEIDEN, NETHERLANDS
[2] UNIV WURZBURG, INST THEORET PHYS, W-8700 WURZBURG, GERMANY
[3] UNIV BIELEFELD, INST PHYS, W-4800 BIELEFELD, GERMANY
[4] NIKHEF H, 1009 DB AMSTERDAM, NETHERLANDS
[5] UNIV DURHAM, DEPT PHYS, DURHAM, ENGLAND
[6] CERN, DIV THEORY, CH-1211 GENEVA, SWITZERLAND
[7] UNIV TURIN, DIPARTIMENTO FIS TEOR, TURIN, ITALY
[8] IST NAZL FIS NUCL, I-10125 TURIN, ITALY
来源：
PHYSICS LETTERS B | 1995年 / 358卷 / 3-4期
关键词：
D O I：
10.1016/0370-2693(95)01002-8
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We discuss theoretical and phenomenological aspects of the use of boson propagators with energy-dependent widths in predictions for high-energy scattering processes, In general, gauge invariance is violated in such calculations. We discuss several approaches to restore gauge invariance, necessary for a reliable result. The most promising method is the addition of the relevant parts of the fermionic corrections, which fulfills all Ward identities, The numerical difference between this and other approaches is studied. A number of recommendations are given for LEP2 computations.
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页码：339 / 346
页数：8
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