XXVI DAE-BRNS High Energy Physics Symposium 2024

Exploring Constraints on Dark hypercharge Models with Light vector Mediator from COHERENT, TEXONO, and Dark Matter Direct Detection Experiments

Not scheduled

20m

Swatantrata Bhavan, Banaras Hindu University, Varanasi

Oral Beyond the standard model

Speaker

HEMANT KUMAR PRAJAPATI (INDIAN INSTITUTE OF SCIENCE, EDUCATION & RESEARCH- BHOPAL (IISER BHOPAL))

Description

Data from Coherent Elastic Neutrino-Nucleus Scattering (CE$\nu$NS) and Elastic Neutrino-Electron Scattering (E$\nu$ES) are utilized to constrain "chiral" $U(1)_{X}$ gauge models featuring a light vector mediator. These models represent a unique class of new symmetries known as Dark Hypercharge Symmetries, where the $Z'$ boson couples to all Standard Model fermions at tree level. The $U(1)_X$ charges are assigned based on anomaly cancellation requirements, allowing significant variation in the relative charges of leptons and quarks across different solutions. This leads to distinct phenomenological signatures for each model, which can be tested and constrained through various experiments. In this work, we analyze recent COHERENT experiment data along with Dark Matter direct detection results from XENONnT, LUX-ZEPLIN, and PandaX-4T, placing new constraints on three benchmark models. We further include constraints from TEXONO data and discuss the potential for improvement with next-generation DM direct detection experiments, particularly the upcoming DARWIN experiment.