The 4th Topics of Particle, Astro and Cosmo Frontiers (TOPAC 2026) 第4届粒子物理、天体物理和宇宙学前沿国际学术研讨会

Session

Plenary Theory 3 (GUT Special Session): Unification (Room 567, Chair Xin-Qiang Li)

17 Apr 2026, 15:40

87. Asymptotic Grand Unified models

Aldo Deandrea (University Lyon 1)

17/04/2026, 15:40

We present the idea of asymptotic grand unification, where the gauge couplings run to a unique fixed point in the ultraviolet, thanks to the presence of a compact extra dimension and to a specific choice group structure and multiplet content. We introduce a minimal model based on a SU(5) gauge theory but also discuss SO(10) and other generalisations, giving also few results on the expected...

109. Consistent high temperature symmetry non-restoration in 3+1 dimensions

Borut Bajc

17/04/2026, 16:10

The phenomenon of symmetry non-restoration goes back to Weinberg around
50 years ago: some systems may exhibit spontaneous symmetry breaking at
large temperature. Only recently however this same behavour has been found
in UV complete models, being previous examples only effective theories with
a UV cutoff. I will describe such a UV complete model both at large and
finite number of colours.

77. Asymptotic grand unification in SO(10)

Ye-Ling Zhou (HIAS-UCAS)

17/04/2026, 16:40

Asymptotic unification, distinct from the conventional concept of unification, suggests that couplings unify at a non-trivial ultraviolet (UV) fixed point. Theory with an interacting UV fixed point is normally referred to as asymptotic safety to address the famous UV Landau pole problem. Alternative to a usual grand unified theory (GUT), an asymptotic GUT gradually unifies gauge couplings in...

76. Modulus stabilization of modular flavor models in Jordan frame supergravity

Fei Wang (Zhengzhou University)

17/04/2026, 17:05

We propose to discuss the modular flavor model and the stabilization of single modulus field in the Jordan frame supergravity with non-minimal scalar-curvature coupling of the form $\Phi(\tau,\bar{\tau})R$. Modular invariance and positivity of the scale factor constrain stringently the form of the frame function, consequently the Kahler potential. We discuss some general properties of scalar...