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SUMMARY:Towards a Minimal Particle-Cosmology Supersymmetric Standard Model
DTSTART;VALUE=DATE-TIME:20080404T100000Z
DTEND;VALUE=DATE-TIME:20080404T110000Z
DTSTAMP;VALUE=DATE-TIME:20261112T014222Z
UID:indico-event-1624@indico.ific.uv.es
DESCRIPTION:I will present a novel and minimal supersymmetric framework of
  hybrid inflation\, which has been called $F_D$-term hybrid inflation. The
  $F_D$-term hybrid model utilizes a subdominant Fayet--Iliopoulos $D$-term
  whose presence explicitly breaks a $D$-parity in the inflaton-waterfall s
 ector. This scenario of inflation can naturally predict lepton number viol
 ation at the electroweak scale\, by tying the $\\mu$-parameter of the MSSM
  to an SO(3)-symmetric Majorana mass $m_N$\, via the vacuum expectation va
 lue of the inflaton field. In my talk\, I will show how a negative Hubble-
 induced mass term in a next-to-minimal extension of supergravity helps to 
 accommodate the present CMB data and considerably weaken the strict constr
 aints on the theoretical parameters\, resulting from cosmic string effects
  on the power spectrum. The usual gravitino overabundance constraint may b
 e significantly relaxed in this model\, once the enormous entropy release 
 from the late decays of the ultraheavy waterfall gauge particles is proper
 ly considered. As the Universe enters a second thermalization phase involv
 ing a very low reheat temperature\, which might be as low as about 0.3 TeV
 \, thermal electroweak-scale resonant leptogenesis provides a viable mecha
 nism for successful baryogenesis\, while thermal right-handed sneutrinos e
 merge as new possible candidates for solving the cold dark matter problem.
  The $F_D$-term hybrid model offers rich particle-physics phenomenology\, 
 which could be probed at high-energy colliders\, as well as in low-energy 
 experiments of lepton flavour or number violation.\n\nhttps://indico.ific.
 uv.es/event/1624/
LOCATION:Dpto. de Física Teórica (UVEG) Sala Seminarios
URL:https://indico.ific.uv.es/event/1624/
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