DIRECT AND INDIRECT CP VIOLATION IN THE DECAY KL-]PI+PI-E+E-

被引:54
作者
HEILIGER, P
SEHGAL, LM
机构
[1] RHEIN WESTFAL TH AACHEN,INST PHYS A 3,W-5100 AACHEN,GERMANY
[2] RHEIN WESTFAL TH AACHEN,INST THEORET PHYS E,W-5100 AACHEN,GERMANY
来源
PHYSICAL REVIEW D | 1993年 / 48卷 / 09期
关键词
D O I
10.1103/PhysRevD.48.4146
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The decay K(L) --> pi+pi-e+e- is analyzed in a model containing (i) a CP-conserving amplitude associated with the M1 transition in K(L) --> pi+pi-gamma, (ii) an indirect CP-violating amplitude related to the brems-strahlung part of K(L) --> pi+pi-gamma, and (iii) a direct CP-violating term associated with the short-distance interaction sdBAR --> e+e-. Interference of the first two components,produces a large CP-violating asymmetry (- 14%) in the distribution of the angle PHI between the e+e- and pi+pi- planes. The full angular distribution contains two further CP-violating observables. Effects of direct CP violation are found to be numerically small.
引用
收藏
页码:4146 / 4154
页数:9
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