Dark Horse, Dark Matter: Revisiting the SO(16)x SO(16)' Nonsupersymmetric Model in the LHC and Dark Energy Era

Abstract

We revisit the nonsupersymmetric SO(16) × SO( 16) model in light of LHC and Dark Energy data. Recently nonsupersymmetric models have become of great interest because the LHC has not found evidence of supersymmetry. In addition nonsupersymmetric models with a single Higgs-like field and small one loop vacuum energy have been constructed. Also models of dark energy with a dilaton-radion potential have also been recently examined in the light of dark energy data and the swampland conjecture. In this paper some of the features of the nonsupersymmetric SO(16) × SO( 16) model with regards to high energy physics and cosmology such as dark energy, vacuum stablilization, dark matter candidates, dark matter portals, gauge-Higgs unification, and quantum cosmology are examined in the context of the LHC and dark energy era.

Glueball scattering cross section in lattice SU(2) Yang-Mills theory

“…In this section, we shall show that the glueball DM is very natural among the composite DM scenarios and dark gauge theories. The assumption of the existence of hidden gauge sectors is indeed a reasonable answer to the problem of the ad hoc gauge group of the SM, since the dark gauge theories may arise naturally in many contexts such as in string or grand unification theories [5,6,14,[67][68][69][70][71][72][73][74][75][76][77][78]]. Here we do not discuss their origin, but rather the constraint on the dark gauge sector that could be imposed assuming the naturalness.…”

Stability, enhanced gauge symmetry and suppressed cosmological constant in 9D heterotic interpolating models

“…It is worth trying to construct realistic models such as the standard(-like) model or non-supersymmetric grand unified theories (GUT) from non-supersymmetric string models. In particular, the SO(16) × SO (16) heterotic model [12,13,14,15,16,17,18], in which a tachyonic state does not appear, is often focused in the investigation of non-supersymmetric string phenomenology [19,20,21,22,23,24,25].…”

Warm Dark Matter from Higher-Dimensional Gauge Theories

“…This implies that the type I superstring on R 9 × S 1 naturally has a Spin(16) × Spin( 16) vacuum. Dark matter has been discussed in relation to nonsupersymmetric Spin(16) × Spin( 16) string theory [25,26,29]. While heterotic string theory leading to the supersymmetric standard model allows for supersymmetric light dark matter candidates such as neutralinos [66], light supersymmetric partners of the standard model below 1.5 TeV have not been observed [67].…”

“…(2) 8 also contains so 16 ⊕ so 16 , which has been studied in relation to dark matter in a different context [29].…”

“…Several studies have looked at larger gauge group representations in relation to dark matter [25][26][27][28][29], but none that would explain the high number of degrees of freedom. In the context of the so-called exceptional super Yang Mills theories, large group representations that could allow this high number to be reached have been explored [30,31].…”