Pseudoscalar mesons and instantons
نویسندگان
چکیده
منابع مشابه
Mixing of Pseudoscalar Mesons
η – η mixing is discussed in the quark-flavor basis with the hypothesis that the decay constants follow the pattern of particle state mixing. On exploiting the divergences of the axial vector currents – which embody the axial vector anomaly – all mixing parameters are fixed to first order of flavor symmetry breaking. An alternative set of parameters is obtained from a phenomenological analysis....
متن کاملResults for light pseudoscalar mesons
We present the current status of the MILC collaboration’s calculations of the properties of the light pseudoscalar meson sector. We use asqtad staggered ensembles with 2+1 dynamical flavors down to a≈ 0.045 fm and light quark mass down to 0.05ms. Here we describe fits to the data using chiral forms from SU(3) chiral perturbation theory, including all staggered taste violations at NLO and the co...
متن کاملPseudoscalar mesons in asymmetric matter
The behavior of kaons and pions in hot non strange quark matter, simulating neutron matter, is investigated within the SU(3) Nambu-Jona-Lasinio [NJL] and in the Enlarged Nambu-Jona-Lasinio [ENJL] (including vector pseudo-vector interaction) models. At zero temperature, it is found that in the NJL model, where the phase transition is first order, low energy modes with K, π+ quantum numbers, whic...
متن کاملQuark Structure of Pseudoscalar Mesons
I review to which extent the properties of pseudoscalar mesons can be understood in terms of the underlying quark (and eventually gluon) structure. Special emphasis is put on the progress in our understanding of η-η mixing. Process-independent mixing parameters are defined, and relations between different bases and conventions are studied. Both, the low-energy description in the framework of Ch...
متن کاملLeptonic and Semileptonic Decays of Pseudoscalar Mesons
We employ the relativistic constituent quark model to give a unified description of the leptonic and semileptonic decays of pseudoscalar mesons (π, K, D, Ds, B, Bs). The calculated leptonic decay constants and form factors are found to be in good agreement with available experimental data and other approaches. We reproduce the results of spin-flavor symmetry in the heavy quark limit.
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ژورنال
عنوان ژورنال: Nuclear Physics B
سال: 1983
ISSN: 0550-3213
DOI: 10.1016/0550-3213(83)90660-0