Chiral extrapolation of lattice data for heavy baryons
نویسندگان
چکیده
منابع مشابه
Chiral Extrapolation of Lattice Data for Heavy Baryons
The masses of heavy baryons containing a b quark have been calculated numerically in lattice QCD with pion masses which are much larger than its physical value. In the present work we extrapolate these lattice data to the physical mass of the pion by applying the effective chiral Lagrangian for heavy baryons, which is invariant under chiral symmetry when the light quark masses go to zero and he...
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We investigate the chiral extrapolation of the lattice data for the light-heavy meson hyperfine splittings D − D and B − B to the physical region for the light quark mass. The chiral loop corrections providing nonanalytic behavior in mπ are consistent with chiral perturbation theory for heavy mesons. Since chiral loop corrections tend to decrease the already too low splittings obtained from lin...
متن کاملChiral Extrapolation of Lattice Data for the Hyperfine Splittings of Heavy Mesons
Hyperfine splittings between the heavy vector (D∗, B∗) and pseudoscalar (D, B) mesons have been calculated numerically in lattice QCD, where the pion mass (which is related to the light quark mass) is much larger than its physical value. Naive linear chiral extrapolations of the lattice data to the physical mass of the pion lead to hyperfine splittings which are smaller than experimental data. ...
متن کاملChiral extrapolation of lattice data for B-meson decay constant
The B-meson decay constant fB has been calculated from unquenched lattice QCD in the unphysical region. For extrapolating the lattice data to the physical region, we propose a phenomenological functional form based on the effective chiral perturbation theory for heavy mesons, which respects both the heavy quark symmetry and the chiral symmetry, and the non-relativistic constituent quark model w...
متن کاملHeavy Baryons from Lattice NRQCD
Extraction of correct mass splittings between vector and pseudoscalar mesons remains a challenging problem in lattice QCD. While quenched lattice QCD has been unable to extract correct mass splittings [1], so far this problem persists even with full lattice QCD [2]. One may thus ask whether lattice results for baryon mass splittings exhibit similar suppression compared to experimental numbers. ...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2003
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.67.074005