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New Physics effects in leptonic and semileptonic decays

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arxiv 2012.09872 v2 pith:4DGPT4D3 submitted 2020-12-17 hep-ph

classification hep-ph
keywords physicsdecayssemileptonicconstraintsdiscussleptonicmodelstandard
verification ladder T0 review T1 audit T2 compute T3 formal
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We discuss the possibilities of extracting the constraints on New Physics by using the current data on the leptonic and semileptonic decays of pseudoscalar mesons. In doing so we use a general low energy Lagrangian that besides the vector and axial operators also includes the (pseudo-)scalar and tensor ones. In obtaining constraints on New Physics couplings we combine the experimental information concerning several decay modes with the accurate lattice QCD results for the hadronic matrix elements. We propose to study new observables that can be extracted from the angular analysis of the semileptonic decays and discuss their values both in the Standard Model and in some specific scenarios of physics beyond the Standard Model.

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Cited by 6 Pith papers

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