Results 61 to 70 of about 20,902 (149)
Dark matter in the Randall-Sundrum model with non-universal coupling
Journal of High Energy Physics, 2019 We consider simplified dark matter models (DM) interacting gravitationally with the standard model (SM) particles in a Randall-Sundrum (RS) framework. In this framework, the DM particles interact through the exchange of spin-2 Kaluza-Klein (KK) gravitons
Ashok Goyal +2 more
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Unveiling the Dynamics of the Universe
, 2016 We explore the dynamics and evolution of the Universe at early and late times, focusing on both dark energy and extended gravity models and their astrophysical and cosmological consequences.
Avelino, Pedro +12 more
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Axion fragmentation on the lattice
Journal of High Energy Physics, 2021 We analyze the phenomenon of axion fragmentation when an axion field rolls over many oscillations of a periodic potential. This is particularly relevant for the case of relaxion, in which fragmentation provides the necessary energy dissipation to stop ...
Enrico Morgante +3 more
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Big Bang Nucleosynthesis hunts chameleon dark matter
Journal of High Energy Physics, 2020 We study the chameleon field dark matter, dubbed scalaron, in F (R) gravity in the Big Bang Nucleosynthesis (BBN) epoch. With an R 2-correction term required to solve the singularity problem for F (R) gravity, we first find that the scalaron dynamics is ...
Hua Chen +3 more
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Leptophilic dark matter from gauged lepton number: phenomenology and gravitational wave signatures
Journal of High Energy Physics, 2019 New gauge symmetries often appear in theories beyond the Standard Model. Here we study a model where lepton number is promoted to a gauge symmetry. Anomaly cancellation requires the introduction of additional leptons, the lightest of which is a natural ...
Eric Madge, Pedro Schwaller
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Physics Beyond the Standard Model
, 2009 I present a brief overview of some exciting possibilities for physics Beyond the Standard Model. I include short discussions of neutrino physics, the strong CP problem and axions, GUTs, large and warped extra dimensions, Little Higgs models and ...
Howard Baer, Marvin L. Marshak
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Journal of High Energy Physics, 2020 In hidden sector models, dark matter does not directly couple to the particle content of the Standard Model, strongly suppressing rates at direct detection experiments, while still allowing for large signals from annihilation.
Dan Hooper +4 more
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Journal of High Energy Physics, 2020 We introduce leak-in dark matter, a novel out-of-equilibrium origin for the dark matter (DM) in the universe. We provide a comprehensive and unified discussion of a minimal, internally-thermalized, hidden sector populated from an out-of-equilibrium ...
Jared A. Evans +2 more
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Cosmology in Mirror Twin Higgs and Neutrino Masses
, 2016 We explore a simple solution to the cosmological challenges of the original Mirror Twin Higgs (MTH) model that leads to interesting implications for experiment.
Chacko, Zackaria +3 more
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String Theory: A Framework for Quantum Gravity and Various Applications [PDF]
, 2008 In this semi-technical review we discuss string theory (and all that goes by that name) as a framework for a quantum theory of gravity. This is a new paradigm in theoretical physics that goes beyond relativistic quantum field theory.
Wadia, Spenta R.
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