Speaker
Prof.
Chris Sachrajda
(University of Southampton)
Description
The precision of lattice QCD computations of many quantities have reached such a precision that isospin breaking corrections, including electromagnetism, must be included if further progress is to be made in extracting fundamental information, such as the values of Cabibbo-Kobayashi-Maskawa matrix elements, from experimental measurements. I discuss the framework for including radiative corrections in leptonic and semileptonic decays of hadrons, including the treatment of infrared divergences. I start by briefly reviewing isospin breaking in leptonic decays and presenting the first numerical results for the ratio $\Gamma(K_{\mu2})/\Gamma(\pi_{\mu2})$ in which these corrections have been included. I will also discuss the additional theoretical issues which arise when including electromagnetic corrections to semileptonic decays, such as $K_{\ell3}$ decays.
Primary author
Prof.
Chris Sachrajda
(University of Southampton)
Co-authors
Dr
Cecilia Tarantino
(Universita Roma Tre)
Mr
Davide Giusti
(Universita Roma Tre)
Dr
Francesco Sanfilippo
(INFN, Sezione di Roma Tre)
Prof.
Guido Martinelli
(Universita di Roma, La Sapienza)
Prof.
Nazario Tantalo
(Universita di Roma Tor Vergata)
Dr
Silvano Simula
(INFN, Sezione di Roma Tre)
Prof.
Vittorio Lubicz
(Universita Roma Tre)