Bethe-Salpeter approach for meson-meson scattering in chiral perturbation theory
نویسندگان
چکیده
منابع مشابه
Bethe-Salpeter Approach for Meson-Meson Scattering in Chiral Perturbation Theory
The Bethe-Salpeter equation restores exact elastic unitarity in the s− channel by summing up an infinite set of chiral loops. We use this equation to show how a chiral expansion can be undertaken by successive approximations to the potential which should be iterated. Renormalizability of the amplitudes in a broad sense can be achieved by allowing for an infinite set of counter-terms as it is th...
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Departamento de F́ısica Moderna Universidad de Granada E-18071 Granada, Spain (February 1, 2008) The Bethe-Salpeter equation restores exact elastic unitarity in the s− channel by summing up an infinite set of chiral loops. We use this equation to show how a chiral expansion can be undertaken in the two particle irreducible amplitude and the propagators accomplishing exact elastic unitarity at an...
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The Bethe–Salpeter equation restores exact elastic unitarity in the s-channel by summing up an infinite set of chiral loops. We use this equation to show how a chiral expansion can be undertaken in the two-particle irreducible amplitude and the propagators accomplishing exact elastic unitarity at any step. Renormalizability of the amplitudes can be achieved by allowing for an infinite set of co...
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We discuss the vector meson masses within the context of Chiral Perturbation Theory performing an expansion in terms of the momenta, quark masses and 1/Nc. We extend the previous analysis to include isospin breaking effects and also include up to order p. We discuss vector meson chiral perturbation theory in some detail and present a derivation from a relativistic lagrangian. The unknown coeffi...
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We show the results for the scattering poles associated to the ρ, f 0 , a 0 , K * , σ and κ resonances in meson-meson scattering. Our amplitudes are obtained from the complete one-loop meson-meson scattering amplitudes from Chiral Perturbation Theory. Once unitarized with the Inverse Amplitude Method, they describe remarkably well the data simultaneously in the low energy and resonance regions ...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1999
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(99)00461-x