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

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

2003-04-22

arxiv.org/abs/hep-ex/0304027v1

Phys.Lett.B562:166-172,2003

Physics

High Energy Physics

High Energy Physics - Experiment

11 pages, 8 figures

Scientific paper

10.1016/S0370-2693(03)00576-8

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.

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