Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-07-21
JHEP 10 (2010) 037
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages, 6 figures; v2: minor changes, comparison with type I and II seesaws added, references added, version to appear on JH
Scientific paper
10.1007/JHEP10(2010)037
We consider a supersymmetric SU(5) model where two neutrino masses are obtained via a mixed type I+III seesaw mechanism induced by the component fields of a single SU(5) adjoint. We have analyzed the phenomenology of the model paying particular attention to flavour violating processes and dark matter relic density, assuming universal boundary conditions. We have found that, for a seesaw scale larger than $10^{12\div 13}$ GeV, BR$(\mu\to e \gamma)$ is in the reach of the MEG experiment in sizable regions of the parameter space. On the other side, current bounds on it force BR$(\tau \to \mu \gamma)$ to be well below the reach of forthcoming experiments, rendering thus the model disprovable if a positive signal is found. The same bounds still allow for a sizable positive contribution to $\epsilon_K$, while the CP violation in the $B_s$ mixing turns out to be too small to account for the di-muon anomaly reported by the D0 collaboration. Finally, the regions where the neutralino relic density is within the WMAP bounds can be strongly modified with respect to the constrained MSSM case. In particular, a peculiar coannihilation region, bounded from above, can be realized, which allows us to put an upper bound on the dark matter mass for certain set-ups of the parameters.
Biggio Carla
Calibbi Lorenzo
No associations
LandOfFree
Phenomenology of SUSY SU(5) with type I+III seesaw does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Phenomenology of SUSY SU(5) with type I+III seesaw, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phenomenology of SUSY SU(5) with type I+III seesaw will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-610067