Prof. Dr. Nazario Tantalo (Roma Tor Vergata)
 https://www.physik.huberlin.de/en/lgt/seminars/qftcolloquium/events/ws2019/20200110
 Prof. Dr. Nazario Tantalo (Roma Tor Vergata)
 20200110T13:30:00+01:00
 20200110T14:30:00+01:00
 QED corrections to hadronic decays on the lattice
What 


When  Jan 10, 2020 from 01:30 to 02:30 (Europe/Berlin / UTC100) iCal 
Where  Konferenzraum 0'119, Erwin SchrödingerZentrum, Rudower Chaussee 26, 12489 Berlin 
QED corrections to hadronic decays on the lattice
QED radiative corrections to hadronic observables are generally rather small but they become phenomenologically relevant when the target precision is at the percent level. This is the case of leptonic and semileptonic decays of light and heavy pseudoscalar mesons. On the one hand, QED radiative corrections to hadronic observables can be calculated with the required nonperturbative accuracy by using lattice techniques. On the other hand, the inclusion of electromagnetic interactions in a lattice calculation is a challenging problem because QED is a longrange unconfined interaction and numerical simulations necessarily require a finite volume. The problem is particularly delicate in the case of QED radiative corrections to decay rates because of the appearance of infrared divergences (proportional to the logarithm of the lattice volume) at intermediate stages of the calculations. In this talk I will briefly review the recent theoretical advances that opened the way to realistic nonperturbative simulations of QCD+QED, discuss a method that allows to calculate QED radiative corrections to hadronic decay rates and present the results of a nonperturbative calculation of the leptonic decay rates P> l nu (gamma) in the case of light (P=pi,K) and charmed (P=D,Ds) pseudoscalar mesons.
Coffee and tea will be offered half an hour before the start of the colloquium.