Phys. Rev. Lett. 100, 241802 (2008) [4 pages]Accumulating Evidence for Nonstandard Leptonic Decays of Ds MesonsReceived 4 March 2008; published 17 June 2008 The measured rate for Ds+→ℓ+ν decays, where ℓ is a muon or tau, is larger than the standard model prediction, which relies on lattice QCD, at the 3.8σ 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. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.241802
DOI:
10.1103/PhysRevLett.100.241802
PACS:
13.20.Fc, 12.38.Gc, 12.60.−i, 14.80.−j
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