Chiral perturbation theory and chiral theory of mesons
نویسندگان
چکیده
منابع مشابه
Chiral perturbation theory for vector mesons.
The interactions of , K , and ! vector-mesons with low-momentum , K and pseudoscalar mesons are constrained by chiral symmetry. We derive a heavy vector-meson chiral Lagrangian in which the vector mesons are treated as heavy static matter elds. The unknown couplings of the chiral Lagrangian are further related using the 1=Nc expansion. Chiral perturbation theory is applied to the vector-meson m...
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We develop quenched chiral perturbation theory for vector mesons made of light quarks, in the limit where the vector meson masses are much larger than the pion mass. We use this theory to extract the leading nonanalytic dependence of the vector meson masses on the masses of the light quarks. By comparing with analogous quantities computed in ordinary chiral perturbation theory, we estimate the ...
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Interactions of a2, K ∗ 2 , f2 and f ′ 2 tensor-mesons with low-energy π,K, η, η ′ pseudo-scalar mesons are constrained by chiral symmetry. We derive a chiral Lagrangian of tensor mesons in which the tensor mesons are treated as heavy non-relativistic matter fields. Using 1/Nc counting, we derive relations among unknown couplings of the chiral Lagrangian. Chiral perturbation theory is applied t...
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A U(2)L×U(2)R chiral theory of pseudoscalar, vector, and axial-vector mesons has been proposed. VMD has been revealed from this theory. The physical processes of normal parity and abnormal parity have been studied by using the same lagrangian and the universality of coupling has been revealed. Two new mass relations between vector and axial-vector mesons have been found. Weinberg’s first sum ru...
متن کاملof Chiral Perturbation Theory
BES II data for J/Ψ → K * (890)Kπ reveal a strong κ peak in the Kπ S-wave near threshold. Both magnitude and phase are determined in slices of Kπ mass by interferences with strong K 0 (1430), K 1 (1270) and K 1 (1400) signals. The phase variation with mass agrees within errors with LASS data for Kπ elastic scattering. A combined fit is presented to both BES and LASS data. The fit uses a Breit-W...
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ژورنال
عنوان ژورنال: Journal of Physics G: Nuclear and Particle Physics
سال: 1998
ISSN: 0954-3899,1361-6471
DOI: 10.1088/0954-3899/24/6/003