Planck 2018&nbsp;<br /> <h2>From the Planck Scale to the Electroweak Scale</h2>

Session

Parallel Session on Unified Models

24 May 2018, 14:00

Bonn

115. Axion Predicitons in SO(10)xU(1) GUT models

Anne Ernst (Desy)

24/05/2018, 14:00

Non-supersymmetric Grand Unified SO(10) × U(1)PQ models have all the ingredients to solve several fundamental problems of particle physics and cosmology — neutrino masses and mixing, baryogenesis, the non-observation of strong CP violation, dark matter, inflation — in one stroke. The axion — the pseudo Nambu-Goldstone boson arising from the spontaneous breaking of the U(1)PQ Peccei-Quinn...

116. Witten's loop in the flipped SU(5) revisited

Michal Malinsky

24/05/2018, 14:20

The flipped SU(5) unification represents one of the rare cases in which the Witten's loop mechanism for the radiative RH neutrino mass generation may be implemented in a potentially realistic manner. It was shown recently that, in a large part of the parameter space, the tight flavour structure of the minimal model of this kind yields relatively strong constraints on the principal smoking-gun...

117. Planck-scale induced uncertainties in proton lifetime estimates and flavour structure of GUTs

Helena Kolesova

24/05/2018, 14:40

Grand Unified Theories predict the proton to be unstable and if a particular model is considered, the partial proton decay widths can be calculated. Most often, however, a renormalizable setting is considered and the effective operators possibly describing the physics at the Planck scale are not taken into account. It is well known that one of such effective operators involving the unification...

118. SO(10) inspired Z′ models at the LHC

Mr Simon King (University of Southampton)

24/05/2018, 15:00

We study Z′ models arising from SO(10)SO(10), focussing in particular on the gauge group of SU(3)C×SU(2)L×U(1)R×U(1)B−L, broken at the TeV scale to the Standard Model gauge group. This gauge group is well motivated from SO(10) breaking and allows neutrino mass via the linear seesaw mechanism. Assuming supersymmetry, we consider single step gauge unification to predict the gauge couplings, then...

119. Pseudo-Goldstone scalars in the minimal SO(10) Higgs model

Katerina Jarkovska

24/05/2018, 15:20

The minimal renormalizable SO(10) Higgs model in which the unified symmetry is broken down by the adjoint representation is known to suffer from tachyonic instabilities along all potentially realistic symmetry-breaking chains. Few years ago, this issue has been identified as a mere relic of the tree level calculations and the radiative corrections to the masses of the pair of the “most...