Pseudoscalar meson form factors and decays

Abstract

In this communication we discuss few topics related with modern experimental data on the physics of light pseudoscalar mesons. It includes the contribution of the pseudoscalar mesons to the muon anomalous magnetic moment (AMM), $g-2$, the rare decays of light pseudoscalar mesons to lepton pair, the transition form factors of pseudoscalar mesons at large momentum transfer, the pion transversity form factor. Measuring the muon anomalous magnetic moment $g-2$ and the rare decays of light pseudoscalar mesons into lepton pair $P\to l^{+}{l}^{-}$ serve as important test of the standard model. To reduce the theoretical uncertainty in the standard model predictions the data on the transition form factors of light pseudoscalar mesons play significant role. Recently new data on behavior of these form factors at large momentum transfer was supplied by the BABAR collaboration. Within the nonlocal chiral quark model it shown how to describe these data and how the meson distribution amplitude evolves as a function of the dynamical quark masses and meson masses.

14 pages, 7 figures, based on the talks given at Hadron Structure 11 (Slovakia, Tatranská Štrba, June 27th - July 1st, 2011), The Actual Problems of Microworld Physics (Gomel, Belarus, August 1 - 12, 2011), International Workshop on e+e- collisions from Phi to Psi (Novosibirsk, Russia, September 19-22, 2011)

References in corpus (14)

• Muon g-2: Review of Theory and Experiment
• Update of the e^+e^-\toπ^+π^- cross section measured by SND detector in the energy region 400<\sqrt{s}<1000 MeV
• On the Pion Distribution Amplitude Shape
• Measurement of the rare decay pi0 -> e+ e-
• Rare decay pi0 -> e+e-: theory confronts KTeV data
• The pseudoscalar hadronic channel contribution of the light-by-light process to the muon (g-2) within the nonlocal chiral quark model
• Measurement of the gamma gamma* --> eta_c transition form factor
• Electron, muon and tau magnetic moments: a theoretical update
• Constraining Light Bosons with Radiative ${\rm Y}(1S)$ Decays
• Complete structure dependent analysis of the decay $P\to l^{+}{l}^{-}$
• QED radiative corrections to the decay pi^0 to e^+e^-
• On mass corrections to the decays P \to l^+l^-
• Rigorous pion electromagnetic form factor behavior in the space-like region
• $\eta$ and ${\eta }^{\prime }$ Physics at BES-III

Cited by in corpus (7)

• Partonic structure of neutral pseudoscalars via two photon transition form factors
• Two Photon Transition Form Factor of $\bar{c}c$ Quarkonia
• Pion transition form factor in the constituent quark model
• Virtuality and Transverse Momentum Dependence of Pion Distribution Amplitude
• Spectroscopic parameters and electromagnetic form factor of kaon in vacuum and a dense medium
• Limit on the pion distribution amplitude
• EKHARA - new gamma gamma generator