TAU POLARIZATION AND ITS CORRELATIONS AS A PROBE OF NEW PHYSICS

被引：102

作者：

BULLOCK, BK ^{[1
]}

HAGIWARA, K ^{[1
]}

MARTIN, AD ^{[1
]}

机构：

[1] KEK,THEORY GRP,TSUKUBA,IBARAKI 305,JAPAN

来源：

NUCLEAR PHYSICS B | 1993年 / 395卷 / 03期

关键词：

D O I：

10.1016/0550-3213(93)90045-Q

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The measurement of the polarisation of the tau from the energy distributions of its decay products is studied for the various decay channels: tau --> taunu, rhonu, a1nu, lnunuBAR, and, in particular, the model dependence of the description of the tau --> (3pi)nu decay is examined. It is shown how this information may be used to identify charged and neutral Higgs bosons via H+/- --> tau+/-nu and H0 --> tau-tau+ decay channels. The effect of using various decay distributions and their correlations in the tau polarisation measurements in Z --> tau-tau+ is studied quantitatively. We show that a significant improvement is achieved even if p+/- --> pi+/-pi0 cannot be distinguished from a1 --> pi+/-pi0pi0. Also tau polarisation measurements from the decays of possible new W or Z bosons at hadron colliders are discussed.

引用

页码：499 / 533

页数：35

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