Chiral extrapolation and determination of low-energy constants from lattice data
نویسندگان
چکیده
منابع مشابه
Chiral Low-Energy Constants
The progress in determining the coupling constants of mesonic chiral Lagrangians is reviewed, with emphasis on the work performed in three successive European Networks (Eurodaphne I and II, Euridice). Reliable estimates of those constants are essential for making full use of next-to-next-to-leading-order calculations in chiral perturbation theory. The precision in the values of the strong coupl...
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I discuss the recent attempts to build an effective chiral Lagrangian incorporating massive resonance states. A useful approximation scheme to organize the resonance Lagrangian is provided by the large-NC limit of QCD. Integrating out the resonance fields, one recovers the usual chiral perturbation theory Lagrangian with explicit values for the low-energy constants, parameterized in terms of re...
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The branching ratios of the measured decay KL → ππee and of the still unmeasured decay K → ππee are calculated to next-to-leading order in Chiral Perturbation Theory (CHPT). Recent experimental results are used to determine two possible values of the combination (N r 16 −N17) of weak lowenergy couplings (LECs) from the O(p4) chiral Lagrangian. The obtained values are compared to the predictions...
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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 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...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2010
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2010.07.037