Vector and Axial Vector Mesons and Chiral Current Algebra
نویسندگان
چکیده
منابع مشابه
Symmetries for Vector and Axial - Vector Mesons ∗
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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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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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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In this paper, we present the full Lagrangian of mesons (pseudoscalars, vectors and axial-vectors) to O(p4) by using the explicit global chiral symmetry and hidden local symmetry in the chiral limit. In this approach, we see that there are many other terms besides the usual eleven terms given in the literature from hidden local symmetry approach. Of particular, there are some terms in our full ...
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We present a systematic study of the vector–axial-vector mixing (V-A mixing) in the current correlation functions and its evolution with temperature within an effective field theory. The a1-ρ-π coupling vanishes at the critical temperature Tc and thus the V-A mixing also vanishes. A remarkable observation is that even for finite mπ the ρ and a1 meson masses are almost degenerate at Tc. The vani...
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ژورنال
عنوان ژورنال: Progress of Theoretical Physics
سال: 1968
ISSN: 0033-068X
DOI: 10.1143/ptp.39.189