arXiv subjects

A. Liptaj

Publications and source records attributed to A. Liptaj.

5 recordsLinked to original sources

arXiv2014

Pion scalar form factor and model independent values of $f_0(500)$ and $f_0(980)$ meson parameters

The pion scalar form factor along with all existing S-wave iso-scalar $ππ$-scattering phase shift data in the elastic region up to $1 {\rm GeV}^2$ are applied for a determination of the $f_0(500)$ and $f_0(980)$ meson parameters $m_{f_0(500)}=(360\pm33){\rm MeV}$, $Γ_{f_0(500)}=(587\pm 85){\rm MeV}$ and $m_{f_0(980)}=(957\pm77) {\rm MeV}$, $Γ_{f_0(980)}=(164\pm142){\rm MeV}$ in a model independent way.

hep-ph↗

arXiv2011

Rigorous pion electromagnetic form factor behavior in the space-like region

New precise experimental information on $σ_{tot}(e^+e^- \to π^+ π^-)$ 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.

hep-ph↗

arXiv2010

Two-Photon Decay Rates of True Neutral Pseudoscalar Mesons from Data on their Transition Form Factors

By means of the universal unitary and analytic model of electromagnetic structure of hadrons the two-photon decay rates of P=pi^0, eta, eta' mesons are determined in an alternative way from data on their transition form factors.

hep-ph↗

arXiv2009

Remarkable suppression of the $e^{+}e^{-}\toπ^{+}π^{-}$ contribution error into muon $g-2$

We use the unitary and analytic model of the pion electromagnetic form factor in order to evaluate in the lowest order the $e^{+}e^{-}\toπ^{+}π^{-}$ 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.

hep-ph↗

arXiv2004

Contributions of $e^+e^-\to P(S)γ$ processes to muon $g-2$

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 $e^+e^-\to P(S) γ$ processes to muon $g-2$ is estimated.

hep-ph↗