Higgs Potential 2025: Exploring Symmetry Breaking in Particle Physics and the Early Universe

Session

Higgs & related indirect BSM 10

21 Dec 2025, 14:00

Conveners

Higgs & related indirect BSM 10

• 铮 Zheng 孙 Sun (四川大学)

13. Positivity bounds and dark matter direct detection bounds of Higgs interaction

Qing Chen (Anhui University of Science and Technology)

21/12/2025, 14:00

We derive a set of linear UV unitarity conditions that go beyond positivity and are easy to implement in an optimization scheme with dispersion relations in a multi-field EFT. We apply it to Higgs self scattering and compare the newly obtained upper bounds with the traditional perturbative unitarity bounds from within the EFT, and discuss some phenomenological implications of the two-sided...

6. EW Vacuum Decay Induced by Domain Walls in the N2HDM

Mohamed Younes Sassi (TDLI, Shanghai Jiao Tong University)

21/12/2025, 14:20

The Next-to-Two-Higgs-Doublet model (N2HDM) has a rich vacuum structure where multiple electroweak (EW) breaking minima, as well as CP and electric-charge breaking minima, can coexist. These minima can be deeper than the electroweak vacuum $v_{𝑒𝑤} \approx 246$ GeV of our universe, making our vacuum metastable. In such a case, one needs to calculate the tunneling rate from the EW vacuum to the...

3. High Reheating Temperature without Axion Domain Walls

Yaoduo Wang (TDLI)

21/12/2025, 14:40

We investigate a cosmological scenario in which the Peccei-Quinn (PQ) symmetry remains broken in the entire history of the Universe, thereby avoiding the formation of axion strings and domain walls. Contrary to the conventional expectation, it is demonstrated that appropriately chosen scalar interactions are able to keep the PQ symmetry broken at arbitrarily high temperatures. We carefully...

23. The Minimal Supersymmetric Standard Model with Non-Invertible Selection Rules

Zhihao Zhang (TDLI)

21/12/2025, 15:00

We investigate a framework of the Minimal Supersymmetric Standard Model
(MSSM) in which the quark and lepton flavor structure and suppression of flavor-
changing neutral currents (FCNCs) are governed by non-invertible selection rules.
By implementing such non-group-like fusion rules for matter fields, arising from
gauging the outer automorphism Z2 of a discrete ZN symmetry, we obtain...

32. Exploring the Landscape of Spontaneous CP Violation in Supersymmetric Theories

Fangchao Liu (TDLI, SJTU)

21/12/2025, 15:20

The strong CP problem remains one of the most important unresolved issues in the Standard Model. Spontaneous CP violation (SCPV) is a promising approach to the problem by assuming that CP is an exact symmetry of the Lagrangian but broken spontaneously at the vacuum, which enables the generation of the observed Cabibbo-Kobayashi-Maskawa (CKM) phase without reintroducing a nonzero strong CP...

9. The scalar sector and lepton Yukawa sector in CP4 3HDM

Bei Liu (Sun Yat-Sen University)

21/12/2025, 15:40

CP4 3HDM is a three-Higgs-doublet model based on the CP symmetry of order 4 (CP4) without any accidental symmetries. When exploring the scalar and Yukawa sector phenomenon of this model, the usual scan procedure is computationally time-consuming and inefficient. A much better scanning procedure, which we call the inversion, is to identify a set of crucial physical observables, to use them as...