ENERGY CORRELATION AND ASYMMETRY OF SECONDARY LEPTONS IN E+E--]T(T)OVER-BAR

被引：35
|
作者：
ARENS, T
SEHGAL, LM
机构：
[1] III. Physikalisches Institut, RWTH Aachen
来源：
PHYSICAL REVIEW D | 1994年 / 50卷 / 07期
关键词：
D O I：
10.1103/PhysRevD.50.4372
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Top quarks produced in the reaction e+e- --> ttBAR are predicted to have a strong spin-spin correlation. We show that this correlation reflects itself in a strong energy correlation of the charge leptons produced in the decays t --> bl+nu(l) (tBAR --> bBARl-nuBARl). Analytical expressions are given for the two-dimensional distribution dsigma/dxdx' where x and x' are scaled energy variables of l+ and l-. In the presence of a CP-violating term in the e+e- --> ttBAR amplitude, this correlation acquires an antisymmetric component which is also calculated. Our formalism yields compact expressions for the single-particle energy spectra of l+ and l- and the asymmetry between them.
引用
收藏
页码：4372 / 4381
页数：10
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