ON GAUGE-INVARIANCE OF BREIT-WIGNER PROPAGATORS

被引：66
作者：
NOWAKOWSKI, M
PILAFTSIS, A
机构：
[1] UNIV KARLSRUHE, INST THEORET TEILCHENPHYS, D-76128 KARLSRUHE, GERMANY
[2] JOHANNES GUTENBERG UNIV, INST PHYS, D-55099 MAINZ, GERMANY
来源：
ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS | 1993年 / 60卷 / 01期
关键词：
D O I：
10.1007/BF01650437
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：
We present an approach to bosonic (Z0, W+/-) as well as fermionic (top-quark) Breit-Wigner propagators which is consistent with gauge invariance arguments. In particular, for the Z0-boson propagator we extend previous analyses and show that the part proportional to k(mu)k(nu)/M2 must be modified near the resonance. We derive a mass shift which agrees with results obtained elsewhere by different methods. The modified form of a resonant heavy fermion propagator is also given.
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页码：121 / 125
页数：5
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