13 papers
The 20 GeV Galactic Halo Excess: Pixel-Level Confirmation and Consistency with Sub-TeV WIMP Annihilation
Trinity Rosebud Stenhouse, Chamkaur Ghag, Frank F. Deppisch
A recent analysis of 15 years of Fermi-LAT data reported a spherically symmetric, halo-like component of the Galactic diffuse emission that peaks near 20GeV. We independently repro…
Probing Quasi-Dirac Neutrino Oscillations at Long Baseline Experiments
Noor-Ines Boudjema, Frank F. Deppisch, Suka Sriyansu Pattanaik
The Dirac or Majorana nature of neutrinos remains one of the most fundamental open problems in particle physics. A natural intermediate scenario arises when small lepton-number-vio…
Linking the Gauge Hierarchy with Neutrino Masses and Dark Matter via Two-step Cosmological Selection
Jin-Lei Yang, Frank F. Deppisch
The hierarchy problem between the electroweak (EW) and Planck scales remains a central puzzle in modern physics. We discuss a promising solution operating through the cosmological…
Probing Dark Sector Particles Coupling to Neutrinos with Double Beta Decay
Noor-Ines Boudjema, Frank F. Deppisch, Antonio Herrero-Brocal +2
Motivated by the observation of non-zero neutrino masses and the potential for discovering physics beyond the Standard Model, numerous experiments are actively searching for neutri…
Sterile Neutrinos at MAPP in the B-L Model
Frank F. Deppisch, Suchita Kulkarni, Wei Liu
The possibility of searching for right-handed neutrinos at the MoEDAL's Apparatus for Penetrating Particles (MAPP) detector is investigated in this work. In particular, pair-produc…
Constraining the SMEFT Extended with Sterile Neutrinos at FCC-ee
Patrick D. Bolton, Frank F. Deppisch, Suchita Kulkarni +2
We investigate how extensions of the Standard Model (SM) involving heavy neutral leptons (HNLs) can be probed at FCC-ee, the proposed high-energy circular collider. Using…