The covariant quark model represents an appropriate theoretical framework to describe the recent results on \(B_{s}\rightarrow J/\psi+\eta\) and \(B_{s}\rightarrow J/\psi+\eta'\) decays from the ...Belle collaboration. In this article we present the main features of he covariant quark model together with details on some of its aspects and methods, which we consider to be important. Further we apply the model specifically to the studied decay processes and give numerical results on decay widths as they follow from the odel. We conclude that the model, with most of its parameters previously fixed from different processes, is able to incorporate the new measurements from the Belle experiment.
New precise experimental information on \(\sigma_{tot}(e^+e^- \to \pi^+ \pi^-)\) is transferred into the space-like region, by taking advantage of the analyticity. As a result a rigorous pion ...electromagnetic form factor behavior is obtained. The latter with some existing model predictions is compared.
We use the unitary and analytic model of the pion electromagnetic form factor in order to evaluate the
e
+
e
−
→
π
+
π
−
contribution into the muon magnetic anomaly in the lowest order. We ...demonstrate, that this technique enables us to reduce the uncertainty of the theoretical prediction importantly in comparison to usual approaches, where the measured data are integrated directly.
Very precise data on
σ
tot
(
e
+
e
−
→
π
+
π
−
)
recently measured by radiative return in Frascati and simultaneously the corrected Novosibirsk CMD-2 and SND data are transferred using the ...analyticity into the space-like region. As a result a rigorous pion electromagnetic form factor behavior is obtained, which is compared with AdS/QCD model predictions and existing data from electroproduction on proton.
We use the unitary and analytic model of the pion electromagnetic form factor in order to evaluate in the lowest order the \(e^{+}e^{-}\to\pi^{+}\pi^{-}\) contribution into the muon magnetic anomaly. ...We demonstrate, that this technique enables us to reduce the uncertainty of the theoretical prediction importantly in comparison to usual approaches, where the measured data are integrated directly.
The present situation on a comparison of theoretical evaluation of the muon anomalous magnetic moment withexperimental one is roughly reviewed. Then by means of a recently elaborated unitary and ...analytic model of the meson transition form factors the contributions of
e
+
e
− →
P(S)γ processes to muon
g − 2 is estimated.
The present situation on a comparison of theoretical evaluation of the muon
anomalous magnetic moment with experimental one is roughly reviewed. Then by
means of a recently elaborated unitary and ...analytic model of the meson
transition form factors the contributions of $e^+e^-\to P(S) \gamma$ processes
to muon $g-2$ is estimated.
The present situation on a comparison of theoretical evaluation of the muon anomalous magnetic moment with experimental one is roughly reviewed. Then by means of a recently elaborated unitary and ...analytic model of the meson transition form factors the contributions of \(e^+e^-\to P(S) \gamma\) processes to muon \(g-2\) is estimated.
