The 16th Particle Physics Phenomenology Workshop

Session

Parallel Session R124

17 Jun 2026, 14:25

NTHU

Conveners

Parallel Session R124

• Jakob EHRING (Academia Sinica, Institute of Physics)

Parallel Session R124

• Torben Christian Frost

29. Studies of Reactor $\nu A_{el}$ and Neutrino Electromagnetic Interactions at KSNL with TEXONO

Manoj Kumar Singh (Institute of Physics, Academia Sinica)

17/06/2026, 14:25

Oral presentation

The TEXONO collaboration proposals in 2006 on reactor electron antineutrinos ($\bar{\nu}_e$) studies of coherent elastic neutrino-nucleus scattering ($\nu A_{el}$) using low-threshold Ge detectors stimulated extensive experimental activity [1], and subsequently demonstrated sub-keV Ge detector technology for neutrino and dark matter experiments with reliable performance in the sub-keV energy...

59. New Limits on couplings of reactor ALPs at the Kuo-Sheng Reactor Neutrino Laboratory

GREESHMA CHANDRABHANU (Institute of Physics, Academia Sinica, Taipei 11529, Taiwan & Department of Physics, Central University of South Bihar, Gaya 824236, India)

17/06/2026, 14:50

Oral presentation

Axion-Like Particles (ALPs) are a broader class of pseudo-Nambu-Goldstone bosons that arise in various extensions of the Standard Model (SM), especially in string theory compactifications. ALPs may be produced in the reactor core via Primakoff conversion and Compton-like processes. We report a laboratory-based search for ALPs using data from the TEXONO experiment at the Kuo-Sheng Reactor...

28. Systematic Computation of Macroscopic Neutrinoless Double Beta Decay

Kung-Yu Chang (National Tsing Hua University)

17/06/2026, 15:05

Oral presentation

A big question in particle physics is whether neutrinos are Dirac or Majorana fermions. Apart from neutrinoless double beta decay ($0\nu\beta\beta$-decay), macroscopic neutrinoless double beta decay (MDBD) is one of the reactions whose observation implies the existence of Majorana neutrinos. MDBD is the longer version of $0\nu\beta\beta$-decay with regard to the interaction...

32. Neutrino superradiance constraint on asteroid-mass PBH Dark Matter and beyond

Yixuan Lin (NTHU)

17/06/2026, 15:20

Oral presentation

Primordial Black Holes (PBHs) are an attractive candidate for Dark Matter (DM) and there has been extensive experimental efforts to look for them. The so-called asteroid mass window $10^{17}$ g - $10^{23}$ g is particularly interesting,as current observations allow such PBHs to constitute all of DM.

In this work we discuss a scenario where PBHs are surrounded by a cloud of superradiantly...

13. Walking-Dilaton Hybrid Inflation with gauged B-L in a Model with Dynamical Scalegenesis

Hiroyuki Ishida (Toyama Prefectural University)

17/06/2026, 16:00

Oral presentation

We propose a hybrid inflationary scenario based on eight-flavor hidden QCD with the hidden colored fermions being in part gauged under B−L gauge symmetry. This hidden QCD is almost scale-invariant, so-called walking, and predicts the light scalar meson (the walking dilaton) associated with the spontaneous scale breaking, which develops the Coleman-Weinberg (CW) type potential as the...

31. Preheating and Higher-Dimensional Operators in Higgs-Starobinsky Inflation After ACT/SPT Data

Prof. Tanmoy Modak (Indian Institute of Science Education and Research Berhampur)

17/06/2026, 16:25

Oral presentation

In this talk, I will discuss the impact of preheating and higher-dimensional operators on the high spectral index ($n_s$) measured by ACT/SPT collaborations in the CMB+BAO data. The recent results place Higgs-Starobinsky inflation in tension at the $2\sigma$ level. I will show how preheating and higher-dimensional operators can help alleviate this tension.

8. Correlated nucleon and di-nucleon decays induced by dark matter

Mathew Thomas (IISER Thiruvananthapuram)

17/06/2026, 16:50

Oral presentation

Baryon number violation in the visible sector induced by anti-baryonic dark matter provides a viable mechanism for low-scale baryogenesis. Two of the most sensitive probes of this scenario are neutron decay processes such as $n \to \bar{\nu} + \text{invisible}$ and $n \to \pi^0 + \text{invisible}$. In this work, we discuss the possible spontaneous breaking of baryon symmetry in the dark sector...

45. Shedding light on Dark Matter Using Extended Higgs Sectors

Juhi Dutta (NTU, Taiwan)

17/06/2026, 17:15

Oral presentation

Dark matter remains one of the most compelling indications of new physics beyond the Standard Model. In this talk, I will present theoretical frameworks accommodating dark matter candidates, focusing on their dark matter phenomenology and how their signatures can be explored at collider experiments, alongside direct and indirect detection searches. I will place particular emphasis on extended...

37. Boosted Dark Matter Directionality in Large Liquid Scintillator Detector

Mr Samuel S. H. Tse (The Chinese University of Hong Kong)

17/06/2026, 17:40

Oral presentation

We demonstrate the differences, with and without directionality information from knockout neutrons, on the sensitivities of Jiangmen Underground Neutrino Observatory JUNO on dark matter (DM) direct detection. Sub-GeV DM can be boosted by cosmic rays to leave a detectable signal in liquid scintillator detectors. These boosted dark matter (BDM) are dominate around the galactic center due to DM...

33. Dark-Portal Leptogenesis in a Non-Holomorphic Modular Scoto-Seesaw Model

Labh Singh (Central University of Himachal Pradesh)

17/06/2026, 17:55

Poster presentation

This work explores the neutrino phenomenology of the scoto-seesaw model under non-holomorphic $A_4$ modular flavor symmetry providing a non-SUSY framework for realization of the modular symmetry. To prevent mixing between the beyond standard model fields associated with the tree and loop-level neutrino mass contributions, we assign even and odd modular weights to these sectors, respectively. ...