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SUMMARY:Dirac gauginos and unification in F-theory - Davies\, R (Universit
 y of Oxford)
DTSTART:20120627T161500Z
DTEND:20120627T163000Z
UID:TALK38702@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:In the MSSM\, the gauginos are assumed to acquire Majorana mas
 ses after supersymmetry breaking. If the light spectrum is extended slight
 ly to include chiral multiplets in the adjoint representation of the gauge
  group\, they can instead acquire Dirac masses by pairing up with the ferm
 ionic components of these multiplets. Dirac gauginos have several interest
 ing properties\, not least that they can be significantly heavier than Maj
 orana gauginos\, without paying any price in naturalness\; this becomes pa
 rticularly interesting in the light of the null results of the 2011 LHC se
 arches for superpartners. One good reason for a theory to contain Dirac ga
 uginos is if it has an unbroken (approximate) R-symmetry. In string theory
 \, the construction of models with adjoint chiral fields and (optionally) 
 an unbroken R-symmetry poses different problems to constructing the MSSM\,
  especially as the gauge couplings no longer unify unless further matter i
 s present. I will discuss solutions to some of these problems within the c
 ontext of F-theory.\n
LOCATION:Seminar Room 1\, Newton Institute
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