Speaker
Dr
Baiyang Zhang
(Wigner research centre for physics)
Description
The s-channel dilepton production from pion-nucleon scattering can be divided into three effective steps, 1) the pion and nucleon scattering results in an excited state of the nucleon, such as N(1440), N(1520) etc. 2) the resonance further decays into a nucleon and a gamma/rho meson, 3) the gamma/rho further decays into a pair of leptons or pions. Such process is studied with spin formalism and effective Lagrangians, where the helicity amplitudes for each process were calculated.
Primary author
Dr
Baiyang Zhang
(Wigner research centre for physics)
