"Light mesons and muon radiative decays and photon polarization asymmetry"
Relatore: Emidio Gabrielli- University of Helsinki
17 Ottobre 2005 ore 15.30
|I will review the main results on the light mesons and muon
radiative decays, considering both final lepton and photon
polarizations. The undergoing dynamics giving rise to lepton
and photon polarization will be examined in the soft and hard
region of momenta.
A particular attention will be devoted to the analysis of the
photon polarization asymmetry. Finiteness of polarized
amplitudes against infrared and collinear singularities will
be shown to take place with mechanisms distinguishing between
right-handed and left-handed final leptons. Finally, a
possible test using photon polarization will be proposed in
order to clarify a recently observed discrepancy in
radiative pion decay.