Susy after LHC8 and the Z-peaked excess in goldstini scenarios

Speaker: 
Alberto Mariotti (Vrije U., Brussels)
Event Type: 
Seminar
Location: 
Aula Caldirola

I will first review the current status of supersymmetric extensions of the Standard Model after LHC8, and I will discuss the 3-sigma Z-peaked excess recently reported by the ATLAS collaboration. Then, after reviewing the usual paradigm for mediation of supersymmetry breaking, I will introduce scenarios with multiple supersymmetry breaking sectors in gauge mediation, characterised by the presence in the low energy spectrum of extra light fermionic degrees of freedom, the pseudo-goldstini. I will derive their radiatively induced mass and describe their interactions with the MSSM particles. Finally I will show how a simplified model in the MSSM with pseudo-goldstini can accommodate the Z-peaked ATLAS excess without conflicting with other existing LHC searches.

Contact address

Dipartimento di Fisica
Università degli Studi di Milano
Via Celoria, 16 I-20133 Milano (Italy)
Tel. +39 02 503 17279 - Fax. 17480

Unimi

INFN Milano