2025 Winter Postdoc Mini-Symposium

Contribution List

4. Direct Constraints on Strongly Interacting Dark Matter from the James Webb Space Telescope

Hailin Xu (Tsung-Dao Lee Institute)

26/12/2025, 13:10

Direct-detection searches for dark matter are insensitive to dark matter particles that have large interactions with ordinary matter, which are stopped in the atmosphere or the Earth’s crust before reaching terrestrial detectors. We use “dark” calibration images taken with the HgCdTe detectors in the near-infrared spectrograph (NIRSpec) on the James Webb Space Telescope (JWST) to derive novel...

7. In-situ Calibration Techniques at TRIDENT

Tailin Zhu

26/12/2025, 13:30

Accurate reconstruction of neutrino–nucleus interaction events is essential for studies of the high-energy Universe and fundamental physics at TRIDENT. The TRIDENT detector will be deployed in the South China Sea, where the seawater environment introduces additional systematic uncertainties to neutrino detection. This talk presents a suite of in-situ calibration techniques developed to...

3. Revisit cLFV in SUSY model with trilinear R-parity violation

Yu-Qi Xiao (Central China Normal University)

26/12/2025, 13:50

TBD

9. DarkSHINE: A fixed-target search for dark photon at the SHINE facility

Haidar Mas'ud Alfanda (TDLI, SJTU)

26/12/2025, 14:10

DarkSHINE is a proposed fixed-target experiment at SHINE aimed at searching for sub-GeV dark-sector mediators and light dark matter.
Its baseline target is an invisibly decaying dark photon (A′→χχˉ) produced in high-intensity electron–nucleus interactions, observed through a missing-energy/momentum signature.
We present the experimental concept, baseline detector design, and a first...

5. From Higgs Precision to BSM Signatures and Electroweak Baryogenesis

Cristian Sierra (Tsung-Dao Lee Institute)

26/12/2025, 14:30

My research explores the limitations of the Standard Model on three fronts. First, improving the theoretical precision for Higgsstrahlung at future electron-positron colliders to enable sensitive probes for new physics. Second, collaborating with ATLAS to search for BSM signatures in multi-lepton and b-jet events at the LHC, employing the GAMBIT framework for global statistical analysis and...

6. Constraining non-standard neutrino interactions with neutral current events at long-baseline oscillation experiments

Joao Paulo Pinheiro (TDLI)

26/12/2025, 15:10

We explore, for the first time, {\textit{neutral-current}} events at long-baseline experiments to constrain vector and axial-vector neutrino non-standard interactions (NSI) with quarks. We leverage the flavor dependence of NSIs to perform an oscillation analysis in the neutral-current channel. We first introduce a framework to parametrize the effect of NSI on the cross section. Then, as an...

1. Domain Walls in Extended Higgs Models

Dr Mohamed Younes Sassi (Tsung-Dao Lee Institute)

26/12/2025, 15:30

Extended Higgs models provide the possibility of new discrete symmetries, which can be spontaneously broken leading to the possibility of creating topological defects such as domain walls in the early universe. In this talk, I discuss some types of domain walls arising in extended Higgs models such as the Two-Higgs-Doublet-Model (2HDM) and the Next-to-Two-Higgs-Doublet-Model (N2HDM) and show...

8. Sub-keV dark photon search with S2-only data in PandaX4T

帅杰 李 (Yalong Hydro)

26/12/2025, 15:50

The PandaX-4T experiment has achieved significant progress in ultra-low energy regions. Here, we present the first search for dark photon signals in the 0.1 - 1 keV energy range, previously unexplored by PandaX-4T. Using Run0+Run1 S2-only data, we set competitive constraints on the kinetic mixing parameter for dark photon masses in the range of 0.1 - 1 keV. This analysis extends the detection...

2. Exploring chirality structure in nucleon decay

Shihwen Hor (TDLI)

26/12/2025, 16:10

Baryon number is an accidental symmetry in the Standard Model, but its violation is theoretically anticipated, making the search for such processes a promising avenue for discovering new physics. We explore how measurements of different nucleon decay channels can reveal the structure of the underlying theory. We investigate the chirality structure of baryon-number violating interactions...

12. Studying dark sector imprints in cosmology

Sk Jeesun - (Tsung Dao Lee Institute)

26/12/2025, 16:30

Relativistic degrees of freedom or N_eff is one of the crucial cosmological parameters and is sensitive to extra radiation energy density at the time of neutrino decoupling. The precise measurement of $N_{eff}$ at the time of CMB formation by Planck 2018 can be used to understand fundamental interactions and to shed light on beyond standard model (BSM) scenarios. In this talk I will explain...