Chiral Extrapolation of Lattice Data for Heavy Meson Hyperfine Splittings
نویسندگان
چکیده
منابع مشابه
Chiral Extrapolation of Lattice Data for Heavy Meson Hyperfine Splittings
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. ...
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We briefly review theoretical calculations for the pseudoscalar-vector meson hyperfine splitting with no open flavor and also report a many body field theoretical effort to assess the impact of chiral symmetry in the choice of effective potentials for relativistic quark models. Our calculations predict the missing ηb meson to have mass near 9400 MeV . The radial excitation ηc(2S) is in agreemen...
متن کاملHeavy Meson Hyperfine Splittings: A Puzzle for Heavy Quark Chiral Perturbation Theory
We show that there is a large discrepancy between the expected light flavor dependence of the heavy pseudoscalar–vector mass splittings and the measured values. We demonstrate that the one–loop calculation is unreliable. Moreover, agreement with experiment requires the leading dependence on SU(3) symmetry breaking to be nearly cancelled, so that the heavy quark mass dependence is unknown and th...
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ژورنال
عنوان ژورنال: Few-Body Systems
سال: 2005
ISSN: 0177-7963,1432-5411
DOI: 10.1007/s00601-005-0121-3