Speaker
Mr
Martin Vojik
(student)
Description
Processes in which the a1 resonance either dominates (τ − → π − π + π − ντ ,
K+ → π + l+ l− , e+ e− → 4π) is supposed to play an important role (photon and
dilepton production from a meson gas) are linked together using the meson dominance
(MD) hypotestis. The mixing angle of a two-part a1 ρπ - Lagrangian is first fixed to-
gether with the mass and width in the a1 propagator by fitting the observed three-pion
mass spectrum in the τ − → π − π + π − ντ decay.
Primary author
Prof.
Peter Lichard
(prof.)
Co-author
Mr
Martin Vojik
(student)
