Chair: G. Rodrigo
Marek Olechowski (University of Warsaw)
NMSSM has enough ingredients to explain the diphoton excess at 750 GeV. We consider the production of the 750 GeV singlet-dominated pseudoscalar $a$ from a decay of the doublet-dominated pseudoscalar $A$, and the subsequent decay of $a$ into two photons via higgsino loop. We demonstrate that this cascade decay of the NMSSM Higgs bosons can explain the diphoton excess in the 13 TeV data...
Luc Darme (LPTHE)
Supersymmetric models with Dirac masses for the gauginos have both a solid top-down theoretical motivation and a rich phenomenology. In this talk, we show that the scalar singlet presents in such models is a sound candidate for the 750 GeV di-photon excess as we can have simultaneously: perturbativity up to the GUT scale, vacuum stability and gauge couplings unification. This is furthermore...
Martin Winkler (University of Bonn)
I investigate the 750 GeV diphoton excess in terms of supersymmetric models which preserve grand unification in the ultraviolet. I show that minimal extensions of the MSSM by a singlet and a vectorlike 5-plet or 10-plet of SU(5) can explain the observed signal while remaining perturbative up to the GUT scale. Different from previous analyses I include the effects of light sfermions in the loop...
Dipankar Das (IFIC, CSIC-Univ Valencia)
I will present some examples of two and three Higgs doublet models where the requirement of "alignment" does not necessarily guarantee decoupling. In such scenarios, a heavy charged scalar in the TeV range can have relatively large contribution to the Higgs to diphoton decay amplitude causing the signal strength to be reduced by more than 10% from the corresponding SM expectation. These...
Sebastian Ellis (University of Michigan)
Recent reports by the CMS and ATLAS collaborations of a possible X(750 GeV) state decaying into two photons present the strongest indication yet of new physics beyond the Standard Model. We focus on the possibilities that this is a scalar or pseudoscalar electroweak isoscalar state produced by gluon-gluon fusion mediated by loops of new heavy fermions. We consider several models of new...