Beyond MSSM baryogenesis

Abstract

Taking the MSSM as an effective low-energy theory, with a cut-off scale of a few TeV, can make significant modifications to the predictions concerning the Higgs and stop sectors. We investigate the consequences of such a scenario for electroweak baryogenesis. We find that the window for MSSM baryogenesis is extended and, most important, can be made significantly more natural.

Splitting theW-ino multiplet by higher-dimensional operators in anomaly mediation

“…Let us briefly address the issue of higher-dimensional operators involving only the Higgs sector. Such operators can affect the Higgs scalar potential and spectrum (see, e.g., [42] and more recently [43]) and the electroweak phase transition [44]. They will be constrained by naturalness considerations and possibly by EDMs, and further constraints from upcoming experiments.…”

Flavour physics constraints in the BMSSM

“…More recently, it was shown [15,16] that in the BMSSM the left-handed stop can also be relatively light, providing additional bosonic degrees of freedom that strengthen the first-order phase transition. The ρ parameter and direct searches for a light sbottom are now the main constraint.…”

“…For M of the order of a few TeV, the non-renormalizable corrections of the BMSSM are sizeable and they have been analyzed in the context of electroweak baryogenesis [15][16][17], dark matter [16,[18][19][20][21][22][23][24], Higgs phenomenology [25][26][27] and collider phenomenology [28,29]. In a nutshell, it has been shown that the consequence of this simple extension of the MSSM including higher order operators which are suppressed by inverse powers of a scale of new physics somewhat higher than the electroweak breaking scale, can significantly relax the constraints coming from the above mentioned physical observables.…”

Beyond the MSSM Higgs bosons at the Tevatron and the LHC

“…If, in addition, relatively light superparticle signals are observed, as might be expected in these scenarios, a clear case for BMSSM physics could be established. Apart from the collider phenomenology induced indirectly by the heavy physics, higher-dimension operators have also been studied in the context of dark matter [12][13][14], cosmology [15] and EW baryogenesis [16][17][18][19][20], and it may be interesting to further explore the connections with collider physics.…”