Journal Article

Shedding new light on sterile neutrinos from XENON1T experiment

Hajkarim, Fazlollah, Shakeri, Soroush, Xue, She-Sheng

2020

Overview

A bstract The XENON1T collaboration recently reported the excess of events from recoil electrons, possibly giving an insight into new area beyond the Standard Model (SM) of particle physics. We try to explain this excess by considering effective interactions between the sterile neutrinos and the SM particles. In this paper, we present an effective model based on one-particle-irreducible interaction vertices at low energies that are induced from the SM gauge symmetric four-fermion operators at high energies. The effective interaction strength is constrained by the SM precision measurements, astrophysical and cosmological observations. We introduce a novel effective electromagnetic interaction between sterile neutrinos and SM neutrinos, which can successfully explain the XENON1T event rate through inelastic scattering of the sterile neutrino dark matter from Xenon electrons. We find that sterile neutrinos with masses around 90 keV and specific effective coupling can fit well with the XENON1T data where the best fit points preserving DM constraints and possibly describe the anomalies in other experiments.

• Publisher: Springer Berlin Heidelberg,Springer Nature B.V,SpringerOpen
• Subject: Anomalies / Apexes / Astronomical models / Beyond Standard Model / Classical and Quantum Gravitation / Constraints / Cosmology / Cosmology of Theories beyond the SM / Dark matter / Effective Field Theories / Electromagnetic interactions / Electrons / Elementary Particles / Fermions / High energy physics / Inelastic scattering / Neutrino Physics / Neutrinos / Particle physics / Physics / Physics and Astronomy / Quantum Field Theories / Quantum Field Theory / Quantum Physics / Recoil / Regular - Theoretical Physics / Regular Article - Theoretical Physics / Relativity Theory / Standard model (particle physics) / String Theory / Xenon