Accumulating evidence for nonstandard leptonic decays of D_s mesons

Details Accumulating evidence for nonstandard leptonic decays of D_s mesons Accumulating evidence for nonstandard leptonic decays of D_s mesons

2008-03-04

arxiv.org/abs/0803.0512v2

Phys.Rev.Lett.100:241802,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages; v2 conforms with PRL version

Scientific paper

10.1103/PhysRevLett.100.241802

The measured rate for D_s -> l nu decays, where l is a muon or tau, is larger
than the standard model prediction, which relies on lattice QCD, at the 3.8
sigma level. We discuss how robust the theoretical prediction is, and we show
that the discrepancy with experiment may be explained by a charged Higgs boson
or a leptoquark.

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