RELATIVISTIC AND GAUGE-INDEPENDENT OFF-SHELL CORRECTIONS TO THE TOPONIUM DECAY WIDTH

被引：18
|
作者：
MODRITSCH, W
KUMMER, W
机构：
[1] Institut fürr Theoretische Physik, Technische Universität Wien, A-1040 Vienna
来源：
NUCLEAR PHYSICS B | 1994年 / 430卷 / 01期
基金：
奥地利科学基金会;
关键词：
D O I：
10.1016/0550-3213(94)90647-5
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：
Off-shell and relativistic bound-state corrections for the decay t-->, b+W are calculated to O(alpha(s)(2)) making full use of the Bethe-Salpeter formalism for weakly bound systems. Thus we are able to take into account all terms to that order in a systematic and straightforward manner. One of the previously not considered contributions cancels precisely gauge dependent terms which appeared in an earlier off-shell calculation. Important cancellations also determine the gauge-independent part.
引用
收藏
页码：3 / 12
页数：10
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