SO(10) inspired Z′ models at the LHC

Abstract

We study and compare various Z 0 models arising from SOð10Þ, focusing in particular on the Abelian subgroup Uð1Þ R × Uð1Þ B−L , broken at the TeV scale to Standard Model hypercharge Uð1Þ Y . The gauge group Uð1Þ R × Uð1Þ B−L , which is equivalent to the Uð1Þ Y × Uð1Þ χ in a different basis, is well motivated from SOð10Þ breaking and allows neutrino mass via the linear seesaw mechanism. Assuming supersymmetry, we first consider single step gauge unification to predict the gauge couplings, then we consider the detection and characterization prospects of the resulting Z 0 at the LHC by studying its possible decay modes into di-leptons as well as into Higgs bosons. The main new result here is to analyse in detail the expected leptonic forward-backward asymmetry at the high luminosity LHC and show that it may be used to discriminate the Uð1Þ R × Uð1Þ B−L model from the usual B − L model based on Uð1Þ Y × Uð1Þ B−L .

Gravitational Waves and Proton Decay: Complementary Windows into Grand Unified Theories

“…Note that G 3211 and G 3211 are completely equivalent [22]. All possible SO (10) cases can be classified into four types denoted as (a), (b), (c) and (d) in Fig.…”

Unification, proton decay, and topological defects in non-SUSY GUTs with thresholds

“…The various breaking patterns we assume are achieved through the suitable choice of the scalar representations and the orientations of their vacuum expectation values (VEVs) [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27]. Also, the different breaking patterns lead to different phenomenological models at low energy, as discussed in [14,24,25,[28][29][30][31] for SO (10) and [17,20,21,[32][33][34][35][36][37][38][39][40][41][42][43] for E (6). The neutrino and charged fermion mass and mixing generation in the context of unified theories are discussed in [24,[44][45][46][47][48][49][50]…”

SO(10)→SU(5)×U(1)χ<

“…At present, the LHC bound [13,14] is about 4.1 TeV. However, a more detailed study [35] shows that it can be improved. Other new particles to look for are the bound states of Ω, i.e., gluinonia, which are possible [25] with higher luminosity at the LHC.…”