A flippon related singlet at the LHC II

Abstract

We consider the 750 GeV diphoton resonance at the 13 TeV LHC in the F -SU(5) model with a Standard Model (SM) singlet field which couples to TeV-scale vectorlike particles, dubbed f lippons. This singlet field assumes the role of the 750 GeV resonance, with production via gluon fusion and subsequent decay to a diphoton via the vectorlike particle loops. We present a numerical analysis showing that the observed 8 TeV and 13 TeV diphoton production cross-sections can be generated in the model space with realistic electric charges and Yukawa couplings for light vector-like masses. We further discuss the experimental viability of light vector-like masses in a General No-Scale F -SU(5) model, offering a few benchmark scenarios in this consistent GUT that can satisfy all experimental constraints imposed by the LHC and other essential experiments.

The Return of the King: No-Scale ${\cal F}$-$SU(5)$

“…The recently excluded possibility of a 750 GeV diphoton resonance seemed to prefer rather light vector-like masses in order to generate the temporarily observed cross section [43,44]. In the event the diphoton resonance would have been confirmed, this requirement of light vector-like masses would have surely excluded our one-parameter version of No-Scale F -SU (5) since the viable vector-like mass M V is larger than about 23 TeV from FIG.…”

Diphoton resonance in F-theory inspired flipped $$\mathrm{SO}(10)$$ SO ( 10 )

“…In a renormalisable theory, the production and decay in this process can be realised through loops involving appropriate vector-like states. Remarkably, a common phenomenon in string theory model building is the occurrence of new singlet fields and vector-like exotic states in the massless spectrum of the effective low energy models which can mediate such processes [8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25] 4 .…”