The 16th Particle Physics Phenomenology Workshop

Session

Parallel Session R124

17 Jun 2026, 14:25

Physics Building R124 (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...

30. Probe for Heavy Dark Matter with Gravitational Wave Detectors

Bo-Yu Lin (NTHU, Taiwan)

17/06/2026, 16:00

Oral presentation

We probe dark matter with gravitational wave detectors by introducing an additional Yukawa-like interaction between dark matter and the detector. In this talk, we investigate the signal induced by kg-scale dark matter in an interferometer, and an algorithm to distinguish the signal from the noise in the detector.

37. Boosted Dark Matter Directionality in Large Liquid Scintillator Detector

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

17/06/2026, 16:15

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...

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

Hiroyuki Ishida (Toyama Prefectural University)

17/06/2026, 16:30

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, 16:55

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.

15. Lack of cosmological expansion versus the Hubble crisis

Michael A. Ivanov (Belarusian State University of Informatics and Radioelectronics)

17/06/2026, 17:20

Poster presentation

The Hubble constant H0 characterizes the rate of cosmological expansion in the ΛCDM model. It is a free parameter of this model and is measured using indirect, model-dependent methods. One of the model's most pressing problems is the statistically significant difference between the Hubble constant values measured at low and high redshifts — the Hubble crisis. Many hypotheses have been put...

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

Mathew Thomas (IISER Thiruvananthapuram)

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...

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

Labh Singh (Central University of Himachal Pradesh)

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. ...