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T-odd correlations in charged Kl4 decays

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arxiv hep-ph/0203044 v1 pith:NKKX6PU3 submitted 2002-03-05 hep-ph

classification hep-ph
keywords decayscorrelationspolarizationt-oddaccuracyanalyseanalysisbeyond
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We analyse the sensitivity to physics beyond the SM of T-odd correlations in $K_{\ell 4}$ decays, which do not involve the lepton polarization. We show that a combined analysis of $K^+_{\mu 4}$ and $K^-_{\mu 4}$ decays can lead to new constraints about CP violation in $\Delta S=1$ charged-current interactions, complementary to those obtained from the transverse muon polarization in $K_{\mu 3}$ and of comparable accuracy.

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