Primary Vector and Axial-Vector Interaction Model andKl4Decays
نویسندگان
چکیده
منابع مشابه
NJL interaction derived from QCD: vector and axial-vector mesons
In previous works effective non-local SU(2) × SU(2) NJL model was derived in the framework of the fundamental QCD. All the parameters of the model are expressed through QCD parameters: current light quark mass m0 and average non-perturbative αs. The results for scalar and pseudo-scalar mesons are in satisfactory agreement to existing data. In the present work the same model without introduction...
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We discuss the possible symmetries of the effective lagrangian describing interacting pseudoscalar-, vector-, and axial-vector mesons. Specific choices of the parameters give rise to an [SU(2) ⊗ SU(2)] symmetry. This symmetry can be obtained either á la Georgi, with all states in the spectrum remaining massless, or in a new realization, implying decoupling of the pseudoscalar bosons from degene...
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A previous model where the low-lying axial-vector mesons are dynamically generated, implementing unitarity in coupled channels in the vector-pseudoscalar (V P ) meson interaction, is applied to evaluate the decay widths of the a1(1260) and b1(1235) axial-vector mesons into πγ. Unlike the case of the a1, the b1 radiative decay is systematically underestimated at tree level. In this work we evalu...
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Almost thirty years ago, Penny G. Estabrooks asked “Where and what are the scalar mesons?” [1]. The first part of her question can now be confidently responded [2]. However, with respect to the “What” many puzzles remain unanswered. Scalar and axial-vector mesons form part of a large family of mesons. Consequently, though it is useful to pay them some extra attention, there is no point in discu...
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ژورنال
عنوان ژورنال: Progress of Theoretical Physics
سال: 1970
ISSN: 0033-068X
DOI: 10.1143/ptp.44.1412