W+-H+ INTERFERENCE AND PARTIAL WIDTH ASYMMETRY IN TOP-QUARK AND TOP ANTIQUARK DECAYS

被引：7
|
作者：
ARENS, T
SEHGAL, LM
机构：
[1] III. Physikalisches Institut (A), Rheinisch-Westfälische Technische Hochschule Aachen
来源：
PHYSICAL REVIEW D | 1995年 / 51卷 / 07期
关键词：
D O I：
10.1103/PhysRevD.51.3525
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We reexamine the question of a possible difference in the partial decay widths of t and t̄, induced by an intermediate scalar boson H+ with CP-violating couplings. The interference of W+ and H+ exchanges is analyzed by constructing the 2×2 propagator matrix of the W+-H+ system, and determining its absorptive part in terms of fermion loops. Results are obtained for the partial rate difference in the channels t→bl+νl and t→bcs̄, which fulfill explicitly the constraints of CPT invariance. These results are contrasted with those in previous work. © 1995 The American Physical Society.
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页码：3525 / 3531
页数：7
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