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

2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/177402We 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 figuresHigh Energy Physics - ExperimentFirst measurement of the T-violating muon polarization in the decay K^+ --> mu^+ nu gammatext