Rare Decays and New Physics Searches

Tomas Blazek

Comenius University in Bratislava (SK)


Rare decays may provide an indirect evidence for new physics extending the Standard Model. They are studied in LHC experiments and also in NA62 Experiment at CERN, and other places. We will analyze selected rare decays focusing on minimal supersymmetry (SUSY) in the large tan beta regime, tan beta = 50, motivated by simple SO(10) GUTs, and taking into account recent LHC constraints. Amplitudes of these processes are enhanced by tan beta which makes them attractive and clearly provides motivation for their exparimental search. A well-known example is Bs decaying into a muon-antimuon pair with SUSY contribution to the amplitude proportional to (tan beta)**3. Our analysis will include the golden K+ decay channel: K+ to pi+ nu nubar studied in a dedicated NA62 experiment. Our results show that left squarks alone contributing at one loop to this process may give a dominant beyond SM contribution at 10% level. In the past, before the LHC, different SUSY contributions were suggested as dominant. We end with our recent results on lepton flavor violating  higgs to mu tau decays.

Seminar takes place on Tuesday, September 5th 2017 at 2:00 PM
in the IEAP meeting room, Praha 2 ‐ Albertov, Horská 3a/22.

Dr. André Sopczak
seminar organizer
doc. Ing. Ivan Štekl, CSc.
Dr. André Sopczak
IEEE CS - NPSS chair

IEEE Czechoslovakia section

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