19 citations · 88 across the 12 of their papers we have counts for
12 papers
How common are grand unified theories?
Johannes Herms, Maximilian Ruhdorfer
The individual fermion generations of the Standard Model fit neatly into a representation of a simple Grand Unified Theory gauge algebra. If Grand Unification is not realized in na…
Flavor-Specific Dark Matter Signatures through the Lens of Neutrino Oscillations
Subhaditya Bhattacharya, Sven Fabian, Johannes Herms +1
We investigate the flavor-specific properties of leptophilic dark matter in neutrino mass models, where dark matter signals are directly correlated with the neutrino oscillation da…
Light Neutrinophilic Dark Matter from a Scotogenic Model
Johannes Herms, Sudip Jana, Vishnu P. K. +1
We present a minimal sub-GeV thermal Dark Matter (DM) model where the DM primarily interacts with neutrinos and participates in neutrino mass generation through quantum loop correc…
Neutrino mass hierarchy from the discrete dark matter model
Cesar Bonilla, Johannes Herms, Omar Medina +1
We explore a possible explanation for the hierarchy in scale between the atmospheric and solar neutrino mass differences (, and ) through th…
Discrete dark matter mechanism as the source of neutrino mass scales
Cesar Bonilla, Johannes Herms, Omar Medina +1
The hierarchy in scale between atmospheric and solar neutrino mass splittings is investigated through two distinct neutrino mass mechanisms, from tree- and one-loop-level contribut…
Light thermal relics enabled by a second Higgs
Johannes Herms, Sudip Jana, Vishnu P. K. +1
Sub-GeV thermal relic dark matter typically requires the existence of a light mediator particle. We introduce the light two-Higgs-doublet portal, illustrated by a minimal UV-comple…
Minimal realization of light thermal Dark Matter
Johannes Herms, Sudip Jana, Vishnu P. K. +1
We propose a minimal UV-complete model for kinematically forbidden Dark Matter (DM) leading to a sub-GeV thermal relic. Our crucial realization is that the two-Higgs-doublet model…
Reevaluation of the cosmic antideuteron flux from cosmic-ray interactions and from exotic sources
Laura Šerkšnytė, Stephan Königstorfer, Philip von Doetinchem +8
Cosmic-ray antideuterons could be a key for the discovery of exotic phenomena in our Galaxy, such as dark-matter annihilations or primordial black hole evaporation. Unfortunately t…
Production and signatures of multi-flavour dark matter scenarios with t-channel mediators
Johannes Herms, Alejandro Ibarra
We investigate the phenomenology of a dark matter scenario containing two generations of the dark matter particle, differing only by their mass and their couplings to the other par…
Neutrino parameters in the Planck-scale lepton number breaking scenario with extended scalar sectors
Cesar Bonilla, Johannes Herms, Alejandro Ibarra +1
Two-loop effects on the right-handed neutrino masses can have an impact on the low-energy phenomenology, especially when the right-handed neutrino mass spectrum is very hierarchica…
Probing multicomponent FIMP scenarios with gamma-ray telescopes
Johannes Herms, Alejandro Ibarra
We consider a scenario where the dark sector includes two Feebly Interacting Massive Particles (FIMPs), with couplings to the Standard Model particles that allow their production i…
A new mechanism of sterile neutrino dark matter production
Johannes Herms, Alejandro Ibarra, Takashi Toma
We consider a scenario where the dark matter candidate is a sterile neutrino with sizable self-interactions, described by a dimension-six operator, and with negligible interactions…