New directions EXploring the Unknown beyond the Standard Model (NEXUS 2026)

Session

Parallel talks (3B)

13 Sept 2026, 13:10

Tsung-Dao Lee Institute/S5F-S500 - Lecture Room (Tsung-Dao Lee Institute)

40. One-loop analysis of dark matter constraints in a complex scalar extension of the Standard Model

Chikako Idegawa (Sun Yat-sen University)

13/09/2026, 13:10

Oral Presentation

We investigate the complex singlet extension of the Standard Model, which provides a scalar dark matter candidate. We impose the constraints from the observed relic abundance together with the most stringent limits from direct detection experiments on the model. The counterterms
are determined so that the vacuum and mass conditions are consistently satisfied at one-loop order, and the...

26. Dark Matter Inelastic Scattering with Nuclei

Dr Oleg Titov (TDLI-SJTU)

13/09/2026, 13:30

Oral Presentation

The talk is devoted to the role of excited final nuclear states in WIMP-nucleus scattering. We generalize the formalism of non-relativistic effective field theory to inelastic scattering and apply the state-of-the-art Relativistic Configuration-interaction Density functional theory to evaluate the event rates in direct detection experiments. We show that for certain interaction operators, the...

10. Revisiting $\mu-e$ conversion in R-parity violating SUSY

Rong-Rong Zhang (TDLI)

13/09/2026, 13:50

The lepton-flavor-violating(LFV) interactions are extremely suppressed in Standerd Model, making this process an excellent way to explore new physics. In this work, we revisit the LFV interactions in R-parity violating SUSY model, with renormalization group running effects(RGEs) from high to low energy scales. The LFV processes $\mu-e$ conversion, $\mu \to e\gamma$ and $\mu \to 3e$ impose...

11. Freeze-in $SU(2)$ vector dark matter at low reheating temperature

Xuan Hong

13/09/2026, 14:10

The freeze-in mechanism for dark matter (DM) requires extremely feeble interactions with the Standard Model (SM), preventing thermal equilibrium in the early Universe and typically evading experimental detection. However, for sufficiently low reheating temperatures ($T_{\rm RH}$), the observed relic abundance can be realized with larger couplings, opening prospects for experimental searches....