The 13th International Workshop on e+e- collisions from Phi to Psi

During the last 15 years the "Radio MontecarLow (“Radiative Corrections and Monte Carlo Generators for Low Energies”) Working Group, see www.lnf.infn.it/wg/sighad/, has been providing valuable support to the development of radiative corrections and Monte Carlo generators for low energy e+e- data and tau-lepton decays. Its operation which started in 2006 proceeded until the last few years...

As one of the hypothetical principles in the Standard Model (SM), lepton flavor universality (LFU) should be measured with a precision as high as possible such that the physics violating this principle can be fully tested. The $Z$ factories at the future $e^-e^+$ colliders provide a great opportunity to perform this task because of their large statistics and high reconstruction efficiencies...

The Mainz Microtron MAMI provides an intense electron beam with energies up to 1.6 GeV. Precision measurements of the electromagnetic form factors and the polarizability of the nucleon are performed. The high degree of polarization of the beam also allows for precision measurements of parity violating asymmetries in elastic electron-proton scattering with longitudinally polarized electrons and...

The technique of parity-violating electron scattering, involving measurements of the asymmetry in the scattering of longitudinally polarized electrons off fixed targets, has become increasingly precise over the past three decades. Such asymmetries are sensitive to weak neutral current interactions (mediated by the Z boson) between electrons and quarks, or between two electrons, and can be...