TRANSVERSE TAU-POLARIZATION IN DECAYS OF THE TOP AND BOTTOM QUARKS IN THE WEINBERG MODEL OF CP NONCONSERVATION

被引：40

作者：

ATWOOD, D

EILAM, G

SONI, A

机构：

[1] TECHNION ISRAEL INST TECHNOL, DEPT PHYS, HAIFA, ISRAEL

[2] BROOKHAVEN NATL LAB, DEPT PHYS, UPTON, NY 11973 USA

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 71卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.71.492

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that the transverse polarization asymmetry of the tau lepton in the decay t --> btau nu is extremely sensitive to CP violating phases arising from the charged Higgs boson exchange in the Weinberg model of CP nonconservation. Qualitatively, the polarization asymmetries are enhanced over rate or energy asymmetries by a factor of almost-equal-to m(t)/m(tau) approximately 100. Thus for optimal values of the parameters the method requires almost-equal-to 10(4) top pairs to be observable rather than 10(7) needed for rate or energy asymmetries. We also examine tau polarization in b decays via b --> cnutau and find that it can also be very effective in constraining the CP violation parameters of the extended Higgs sector.

引用

页码：492 / 495

页数：4

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