Decay constant of $$B_s$$ and $$B^*_s$$ mesons from $$\mathrm{N_f}=2$$ lattice QCD
نویسندگان
چکیده
منابع مشابه
B-meson decay constant from unquenched lattice QCD.
We present determinations of the -meson decay constant f(B) and f(B)(s)/f(B) using the MILC Collaboration unquenched gauge configurations, which include three flavors of light sea quarks. The mass of one of the sea quarks is kept around the strange quark mass, and we explore a range in masses for the two lighter sea quarks down to m(s)/8. The heavy quark is simulated using nonrelativistic QCD, ...
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The decay constants of B and D mesons are computed in quenched lattice QCD at two different values of the coupling. The action and operators are O(a) improved with non-perturbative coefficients where available. The results are fB = 218 +5 −5 + 5 −41 MeV, fD = 220 +3 −3 + 2 −24 MeV, fBs = 242 +4 −4 +13 −48 MeV, fDs = 241 +2 −2 + 7 −30 MeV. Systematic errors are discussed in detail. Results for v...
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ژورنال
عنوان ژورنال: The European Physical Journal C
سال: 2020
ISSN: 1434-6044,1434-6052
DOI: 10.1140/epjc/s10052-020-7965-z