Comment on Implications of new physics in the decays Bc (J/,ηc)τ
Abstract
As part of a study BSM corrections to leptonic decays of the Bc meson, Tran et al. (arXiv:1801.06927) use the covariant confining quark model (CCQM) to estimate the matrix element of the pseudo-scalar curent between the vacuum and the Bc meson. We note that this matrix element can be determined using existing lattice QCD results.
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