Radiative decays with scalar mesons a 0 (980) and f 0 (980) in Resonance Chiral Theory The Ï†(1020) radiative decays form a good playground for study of the low-lying a0(980) and f0(980) scalarâ€¦ (More)

We present a relativistic calculation of pion scattering, pion photoproduction and Compton scattering on the nucleon in the energy region of the âˆ†-resonance (upto 450 MeV photon lab energy), in aâ€¦ (More)

Radiative decays with a 0 (980) and f 0 (980) from ChPT at order p 4 Abstract. 1 A consistent description of the Ï€ 0 Ï€ 0 invariant mass distribution in the Ï† (1020) â†’ f 0 (980)Î³ â†’ Ï€ 0 Ï€ 0 Î³ decay andâ€¦ (More)

Results of a relativistic model for pion-and photon-induced reactions on the proton are presented. The model is crossing symmetric and gauge invariant. have been included explicitly in theâ€¦ (More)

Production of lepton pairs in the Î³p â†’ eâˆ’e+p reaction is studied at photon energies up to 1 GeV. We show that even if lepton charge is not measured there are extensive kinematical regimes where theâ€¦ (More)

The process of e+eâˆ’ annihilation into a Ï€+Ï€âˆ’ pair with radiation of a photon is considered. The amplitude of the reaction e+eâˆ’ â†’ Ï€+Ï€âˆ’Î³ consists of the model independent initial-state radiation (ISR)â€¦ (More)

Magnetic moment and radius of the nucleon are calculated in a nonlo-cal extension of the chiral linear Ïƒâˆ’model. Properties of the nonlocal model under the vector and axial transformations areâ€¦ (More)

We show that lepton-pair production in Virtual Compton Scattering offers, through interference with the well-known Bethe-Heitler process, a sensitive probe to learn the longitudinal response ofâ€¦ (More)

The energy and four-momentum (Q 2) dependence of the photo-absorption cross section on the proton is calculated for helicity-1 2 and-3 2 states. An effective Lagrangian model is used, formulated inâ€¦ (More)