2-PHOTON CONTRIBUTION TO POLARIZATION IN K+ -]PI+MU+MU-

被引：17

作者：

LU, M ^{[1
]}

WISE, MB ^{[1
]}

SAVAGE, MJ ^{[1
]}

机构：

[1] UNIV CALIF SAN DIEGO,LA JOLLA,CA 92093

来源：

PHYSICAL REVIEW D | 1992年 / 46卷 / 11期

关键词：

D O I：

10.1103/PhysRevD.46.5026

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Short-distance physics involving virtual top and charm quarks contributes to mu+ (and mu-) polarization in the decay K+ --> pi+mu+mu-. Measurement of the parity-violating asymmetry (GAMMA(R) - GAMMA(L) ) /(GAMMA(R) + GAMMA(L)), where GAMMA(R) and GAMMA(L) are the rates to produce right- and left-handed mu+, may provide valuable information on the unitarity triangle. The parity-violating asymmetry also gets a contribution from Feynman diagrams with two-photon intermediate states. We estimate this two-photon contribution to the asymmetry and discuss briefly the two-photon contribution to time-reversal-odd asymmetries that involve both the mu+ and mu- polarizations

引用

页码：5026 / 5033

页数：8

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