Speaker
Mr
Andrew Lawson
(University of Southampton)
Description
The rare decays of a kaon into a pion and a lepton/antilepton pair proceed via a flavour changing neutral current and therefore first arise in the Standard Model only as a second order electroweak interaction. This natural suppression makes these decays sensitive to the effects of potential New Physics. However the rare decay channels K+ -> pi+ l+ l- are dominated by contributions from long-distance effects, where the two electroweak processes are separated by distances over which non-perturbative QCD effects play a significant role. In this talk I will provide an update on the progress of our exploratory calculations of the long-distance contributions to K+ -> pi+ l+ l- amplitudes, which make use of the Domain Wall Fermion ensembles of the RBC and UKQCD collaborations.
Primary author
Mr
Andrew Lawson
(University of Southampton)
Co-authors
Dr
Andreas Juettner
(University of Southampton)
Dr
Antonin Portelli
(The University of Edinburgh)
Prof.
Christopher Sachrajda
(University of Southampton)
Prof.
Norman Christ
(Columbia University)
Dr
Xu Feng
(Peking University)
