Ponente
Sebastian Ellis
(University of Michigan)
Descripción
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 vector-like fermions, as well as the possibility that X(750) is a dark matter mediator, with a neutral vector-like dark matter particle. The decays X → ZZ, Zγ and W+W− are interesting prospective signatures that may help distinguish between the different vector-like fermion models.
Autor primario
Sebastian Ellis
(University of Michigan)
