Phoenix 2025

Session

Parallel 3

10 Jul 2025, 17:00

Auditorium-2 (Convention Center)

Conveners

Parallel 3: DM+ Neutrino

• Moon Moon Devi (Tezpur University, India)

Description

Neutrino

50. Neutrino interaction measurement using emulsion based detector at NINJA experiment

Mahesh Jakkapu (Ruder Boskovic Institute, Zagreb)

10/07/2025, 17:00

Neutrino oscillation measurements via long-baseline experiments rely on the accurate measurement of neutrino interactions with the nucleus and subsequent reconstruction of the neutrino energy. A signature of charged-current (CC) neutrino interaction in the detector is the lepton in the final state and further event classification of CC events in detectors is done based on the composition of...

51. Seesaw Models and Charged Lepton Flavor Violation in Meson Decays: A Comparative Study

Dr Jai More (INDIAN INSTITUTE OF TECHNOLOGY BOMBAY)

10/07/2025, 17:15

The observation of neutrino oscillations implies the existence of flavour violation in the charged lepton sector. The branching ratios of various charged lepton flavour-violating (CLFV) decay modes are influenced by the underlying neutrino mass model. This study investigates the correlations between radiative CLFV decays and meson CLFV decays within the framework of the three simple seesaw...

52. Exploring invisible neutrino decay at P2SO experiment

Priya Mishra

10/07/2025, 17:30

The small mass of neutrinos enables the possibility of rapid neutrino decay in
beyond Standard Model scenarios. If the final state involves an active neutrino,
it is called a visible decay, whereas decay into a lighter sterile state is known
as invisible decay. This study explores the effects of the invisible decay of the
$\nu_3$ state into a sterile neutrino and a Majoron, within the...

53. Impact of the Active-Sterile MSW Resonance on Fast Flavor Conversions in Supernovae

TARUN CHANDA (Indian Institute of Technology Guwahati)

10/07/2025, 17:45

Sterile neutrinos, hypothetical singlet fermions, interact with ordinary matter only through mixing with active neutrinos. In core-collapse supernovae, their production via Mikheyev-Smirnov-Wolfenstein (MSW) resonances of electron neutrinos and antineutrinos can influence explosion dynamics and nucleosynthesis. We probe the effect of these kinds of MSW conversions on the fast flavor...

54. Exploring neutrino oscillations in curved spacetime in long-baseline experiments

Papia Panda (University of Hyderabad)

10/07/2025, 18:00

In this presentation we discuss the effect of neutrino oscillation in presence of curved spacetime. The influence of curvature on fermionic fields is described by the spin connection, which consists of two components: a universal gravitational term and a non-universal contorsion term. The contraction of contorsion with tetrad fields, which serves as a link between the internal flat space...

61. CMB pathway to constraining UV freeze-in dark matter

Sujit Kumar Sahoo (Indian Institute of Technology Hyderabad)

10/07/2025, 18:15

Prediction of spectral index from the temperature fluctuation of Cosmic Microwave Background (CMB) can play a pivotal role in predicting the reheating dynamics in the early Universe. In this work, we consider α-attractor model of inflation and investigate the reheating phenomena in conjunction with the production of dark matter from the thermal bath via a dimension five operator. The...