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SUMMARY:Multilepton and multiphoton signatures of supersymmetry at the LHC
  - Christoffer Petersson (ULB)
DTSTART:20140606T150000Z
DTEND:20140606T160000Z
UID:TALK51957@talks.cam.ac.uk
CONTACT:Damien George
DESCRIPTION:Motivated by the absence of any clear signal of physics beyond
  the Standard Model (SM) at the LHC after Run 1\, I will discuss one possi
 ble\nslight hint of new physics and one non-minimal extension of the SM. I
 n the first part of the talk I will provide a tentative explanation of a s
 mall excess\nof multilepton events\, observed by the CMS collaboration\, b
 y means of a simplified model of gauge mediated supersymmetry breaking (GM
 SB). In the second\npart of the talk I will discuss how the standard pheno
 menology of GMSB can be significantly modified by the non-minimal assumpti
 on that supersymmetry is\nbroken in more than one hidden sector. Multiple 
 hidden sectors give rise to light neutral fermions called pseudo-goldstini
  and due to the extra decay steps\nthey give rise to\, where soft photons 
 are emitted\, these models give rise to multiphoton plus missing energy si
 gnatures. I will compare against existing\nLHC searches and propose new se
 arches designed to probe these models.
LOCATION:Seminar Room B\, Rutherford Building\, Cavendish Laboratory
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