Heavy-strange meson decay constants in the continuum limit of quenched QCD - High Energy Physics - LatticeReport as inadecuate




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Abstract: We improve a previous quenched result for heavy-light pseudoscalar mesondecay constants with the light quark taken to be the strange quark. A finerlattice resolution a ~ 0.05 fm in the continuum limit extrapolation of thedata computed in the static approximation is included. We also give furtherdetails concerning the techniques used in order to keep the statistical andsystematic errors at large lattice sizes L-a under control. Our final result,obtained by combining these data with determinations of the decay constant forpseudoscalar mesons around the D s, follows nicely the qualitative expectationof the 1-m-expansion with a relative 1-m-term of about -0.5 GeV-m PS. At thephysical b-quark mass we obtain F {B s} = 1937 MeV, where all errors apartfrom the quenched approximation are included.



Author: Michele Della Morte CERN, Stephan Durr Bern U., Damiano Guazzini DESY, Jochen Heitger Muenster U., Andreas Juttner Southampton U.

Source: https://arxiv.org/







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