Transition form factors and mixing of pseudoscalar mesons from anomaly sum rule
نویسندگان
چکیده
منابع مشابه
Photon-meson transition form factors of light pseudoscalar mesons
The photon-meson transition form factors of light pseudoscalar mesons π0, η, and η′ are systematically calculated in a light-cone framework, which is applicable as a light-cone quark model at low Q2 and is also physically in accordance with the light-cone pQCD approach at large Q2. The calculated results agree with the available experimental data at high energy scale. We also predict the low Q2...
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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....
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The elastic charge form factors of the pion, kaon, Dand B-mesons are calculated within a relativistic constituent quark model formulated on the light-cone. Our parameter free predictions agree well with the available data. The results are approximately independent of the assumed form of the lightcone wave function, in particular they do not depend on the high momentum tail of the wave function ...
متن کاملDecay Constants and Semileptonic Form Factors of Pseudoscalar Mesons
A relativistic constituent quark model is adopted to give an 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 the results of other approaches. Eventually, the model is found to reproduce the scaling behaviours of ...
متن کاملTransition form factors and light cone distribution amplitudes of pseudoscalar mesons in the chiral quark model
It is shown that a chiral quark model of the Nambu–Jona-Lasinio type can be used to describe ”soft”-momenta parts of the amplitudes with large momentum transfer. As a sample, the processes γ∗ → γ(π, η, η′) where one of the photons, γ∗, has large spacelike virtuality is investigated. The γ∗ → γ(π, η, η′) transition form factors are calculated for a wide region of transferred momenta. The results...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2013
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.87.036013