First measurement of the T-violating muon polarization in the decay K^+ --> mu^+ nu gamma

V. V. Anisimovsky; A. N. Khotjantsev; A. P. Ivashkin

doi:10.1016/S0370-2693(03)00576-8

paper

First measurement of the T-violating muon polarization in the decay K^+ --> mu^+ nu gamma

arXiv:hep-ex/0304027 · doi:10.1016/S0370-2693(03)00576-8

Abstract

We present the result of the first measurement of the T-violating muon polarization P_T in the decay K^+ --> mu^+ nu gamma. This polarization is sensitive to new sources of CP-violation in the Higgs sector. Using data accumulated in the period 1996-98 we have obtained P_T = (-0.64 +- 1.85(stat) +- 0.10(syst))x10^{-2} which is consistent with no T-violation in this decay.

11 pages, 8 figures