Finite volume at two-loops in chiral perturbation theory
نویسندگان
چکیده
منابع مشابه
Finite volume effects in chiral perturbation theory
There has recently been an intense activity in the study of finite volume effects by means of chiral perturbation theory. In this contribution I review recent work in this field both for the ǫ– (MπL . 1) and the p–regime (MπL ≫ 1). For the latter I emphasize the importance of going beyond leading order calculations in chiral perturbation theory and the usefulness of asymptotic formulae à la Lüs...
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Recent progress in the formulation of chiral fermions on the lattice makes it possible to approach the regime of the physical light quark masses. However, lattice volumes V = L needed to ensure negligible finite size effects are prohibitively large for such light quarks. Only when L is very large compared to the Compton wavelength of the lightest particles of the theory (i.e. the pions) are the...
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The vector and axial-vector two-point functions are calculated to nextto-next-to-leading order in Chiral Perturbation Theory for three light flavours. We also obtain expressions at the same order for the masses, mπ, m 2 K and mη, and the decay constants, Fπ, FK and Fη . We present some numerical results after a simple resonance estimate of some of the new O(p6) constants. PACS: 12.39.F, 14.40.A...
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Properties of the proton and neutron are studied in partially-quenched chiral perturbation theory at finite lattice spacing. Masses, magnetic moments, the matrix elements of isovector twist-2 operators and axial-vector currents are examined at the one-loop level in a double expansion in the light-quark masses and the lattice spacing. This work will be useful in extrapolating the results of simu...
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I give an overview of the calculations done in three-flavour Chiral perturbation theory at next-to-next-to-leading order with an emphasis on those relevant for an improvement in the accuracy of the measurement of Vus. It is pointed out that all needed low energy constants can be obtained from experiment via the scalar form-factor in K ℓ3 decays.
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ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2015
ISSN: 1029-8479
DOI: 10.1007/jhep01(2015)034