Strange Vector Form Factor of Kaons

Starting from the $\omega$-$\phi$ mixing, further assuming the coupling of the quark-current of some flavour to be of universal strenth exclusively to the component of vector-meson wave function with the same flavour and finally taking numerical values of the coupling constant ratios $(f_{\omega K \bar K}/f_{\omega}^e)$, (f_{\phi K\bar K/f_{\phi}^e) from the isoscalar part of a realistic six-resonance unitary and analytic model of the kaon electromagnetic structure, the strange-quark vector current form factor behaviour of K-mesons in space-like and time-like regions is predicted.Comment: Latex, 11 pages, 3 figure

Implication of the proton electric FF space-like behavior puzzle in various physical phenomena

By means of the 10-resonance unitary and analytic model of nucleon electromagnetic structure it is demonstrated that the JLab proton polarization data on the ratio $\mu_p G_{Ep}(Q^2)/G_{Mp}(Q^2)$ are consistent with all form factor properties, however, they strongly require an existence of the zero in G_{Ep}(Q^2) around Q^2=13 GeV^2. As a result there are two contradicting behaviors of G_{Ep}(Q^2) in space-like region. Consequences of this phenomenon on the charge distribution within the proton, on the saturation of the new proton-neutron q^2-dependent sum rule, on the behavior of strange nucleon form factors and the deuteron elastic structure functions through the impulse approximation are investigated.Comment: Talk given at XLI PNPI Winter School in Repino 19-25 February 200

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.Comment: 7 pages, 6 eps figures. Lecture given at Hadron Structure and QCD: from LOW to HIGH energies, Gatchina, Russia, July 5 - July 9, 201

Sum rules for total cross-sections of hadron photoproduction on pseudoscalar mesons

Sum rules are derived relating mean squared charge radii of the pseudoscalar mesons with the convergent integral of the difference of hadron photoproduction cross-sections on pseudoscalar mesons.Comment: LaTeX, 5 pages, 1 figur

Pion scalar form factor and model independent values of f0(500)f_0(500) and f0(980)f_0(980) meson parameters

The pion scalar form factor along with all existing S-wave iso-scalar $\pi\pi$-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 $m_{f_0(500)}=(360\pm33){\rm MeV}$, $\Gamma_{f_0(500)}=(587\pm 85){\rm MeV}$ and $m_{f_0(980)}=(957\pm77) {\rm MeV}$, $\Gamma_{f_0(980)}=(164\pm142){\rm MeV}$ in a model independent way.Comment: 13 pages, 3 figures, submitted to Phys.Rev.

Unitary and Analytic Models in Particle Physics Phenomenology

After two decades of a development of the unitary and analytic models of the electromagnetic structure of hadrons and nuclei their main principles are briefly formulated, then a general scheme of their applications to the electromagnetic, weak and strong interaction processes are traced out and finally, some results of their successful applications are reviewed.Comment: Latex, 30 pages, 23 figures. Presented at the Hadron Hadron Structure 2000 Conference, October 2-7 2000, Stara Lesna, High Tatra Mountains, Slovak Republi

Ground state 1/2+1/2^+ octet baryon sum rules predicting a chain of inequalities for hadron photoproduction total cross-sections on corresponding baryons

Sum rules are derived relating Dirac mean square radii and anomalous magnetic moments of various couples of the ground state $1/2^+$ octet baryons with the convergent integral of the difference of hadron photoproduction cross-sections on the corresponding baryons. Taking into account the present knowledge of static parameters of baryons a chain of inequalities for total hadronic photoproduction cross-sections on baryons is found from those sum rules.Comment: Revtex, 9 pages, 1 figur

Remarkable suppression of the e+e−→π+π−e^{+}e^{-}\to\pi^{+}\pi^{-} contribution error into muon g−2g-2

We use the unitary and analytic model of the pion electromagnetic form factor in order to evaluate in the lowest order the $e^{+}e^{-}\to\pi^{+}\pi^{-}$ 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.Comment: 5 Latex pages,1 figure. Talk at the HSQCD 2009 Int. Conference, Tatranska Strba, 29.8.3.9.2009, Slovak Republi

Sum rule for photon target

The amplitude of zero angle scattering of electron on photon in the 3-rd QED order of fine structure constant with $\gamma^*\gamma$ intermediate state converting into quark--antiquark is considered. Utilizing analytic properties of elastic photon--photon scattering amplitude an explicit expression for differential cross- section of quark--antiquark pair production at electron-photon collision in peripheral kinematics is derived apparently. Limiting case of small transferred momenta with an application of the Weizs\"acker-Williams like relation gives the sum rule for photon target, bringing into the relation the sum of ratios of the four power of the quark charges to squared quark masses with integral over the total $\gamma\gamma \to 2 jets$ cross--section.Comment: Revtex, 3 pages, 2 figure

Numerical values of fFf^F, fDf^D, fSf^S coupling constants in SU(3)SU(3) invariant interaction Lagrangian of vector-meson nonet with 1/2+1/2^+ octet baryons

It is demonstrated how an utilization of all existing experimental information on electric and magnetic nucleon form factors, to be described by the Unitary and Analytic (U\&A) nucleon electromagnetic structure model in space-like and time-like regions simultaneously, can provide numerical values of $f^F$, $f^D$, $f^S$ coupling constants in $SU(3)$ invariant interaction Lagrangian of the vector-meson nonet with $1/2^+$ octet baryons. The latter, together with universal vector-meson coupling constants $f_V$, play an essential role in a prediction of $1/2^+$ octet hyperon electromagnetic form factors behaviors.Comment: 41 pages, 25 figure