Results 61 to 70 of about 4,933 (138)

Some theories beyond the Standard Model

, 2015
A brief review on the physics beyond the Standard Model is given, as was presented in the High Energy Particle Physics workshop on the $12^{th}$ of February 2015 at the iThemba North Labs.
Cornell, Alan S.
core   +1 more source

The quality/cosmology tension for a post-inflation QCD axion

Journal of High Energy Physics
It is difficult to construct a post-inflation QCD axion model that solves the axion quality problem (and hence the Strong CP problem) without introducing a cosmological disaster. In a post-inflation axion model, the axion field value is randomized during
Qianshu Lu, Matthew Reece, Zhiquan Sun
doaj   +1 more source

Common Origin of Non-zero $\theta_{13}$ and Baryon Asymmetry of the Universe in a TeV scale Seesaw Model with $A_4$ Flavour Symmetry

, 2018
We study the possibility of generating non-zero reactor mixing angle $\theta_{13}$ and baryon asymmetry of the Universe within the framework of an $A_4$ flavour symmetric model.
Borah, Debasish, Das, Mrinal Kumar, Mukherjee, Ananya   +2 more
core   +1 more source

Self consistent thermal resummation: a case study of the phase transition in 2HDM

Journal of High Energy Physics
An accurate description of the scalar potential at finite temperature is crucial for studying cosmological first-order phase transitions (FOPT) in the early Universe.
Pedro Bittar, Subhojit Roy, Carlos E. M. Wagner   +2 more
doaj   +1 more source

Homeopathic Dark Matter, or how diluted heavy substances produce high energy cosmic rays

, 2019
We point out that current and planned telescopes have the potential of probing annihilating Dark Matter (DM) with a mass of O(100) TeV and beyond. As a target for such searches, we propose models where DM annihilates into lighter mediators, themselves ...
Cirelli, Marco, Gouttenoire, Yann, Petraki, Kalliopi, Sala, Filippo   +3 more
core   +1 more source

Early vs late string networks from a minimal QCD Axion

Journal of High Energy Physics
We propose a new regime of minimal QCD axion dark matter that lies between the pre- and post-inflationary scenarios, such that the Peccei-Quinn (PQ) symmetry is restored only on sufficiently large spatial scales.
Marco Gorghetto, Edward Hardy, Horia Nicolaescu, Alessio Notari, Michele Redi   +4 more
doaj   +1 more source

Primordial gravitational waves from excited states

Journal of High Energy Physics, 2022
We show that a scalar excited state with large occupation numbers during inflation leads to an enhancement of tensor modes and a characteristic pattern of order-one oscillations in the associated stochastic gravitational wave background (SGWB) sourced ...
Jacopo Fumagalli, Gonzalo A. Palma, Sébastien Renaux-Petel, Spyros Sypsas, Lukas T. Witkowski, Cristobal Zenteno   +5 more
doaj   +1 more source

Antimatter cosmic rays from dark matter annihilation: First results from an N-body experiment

, 2008
[Abridged]. We take advantage of the galaxy-like 3D dark matter map extracted from the HORIZON Project results to calculate the positron and antiproton fluxes from dark matter annihilation, in a model-independent approach as well as for dark matter ...
A. Bosma, D. Maurin, E. Athanassoula, E. Nezri, F.-S. Ling, J. Lavalle, J. S. Perko, R. Teyssier, S. Haino, V. S. Berezinskii, W. Dehnen   +10 more
core   +3 more sources

Moduli trapping mechanism in modular flavor symmetric models

Journal of High Energy Physics, 2023
We discuss how the moduli in modular flavor symmetric models dynamically select enhanced symmetry points at which the residual modular symmetry renders extra matter fields massless.
Shota Kikuchi, Tatsuo Kobayashi, Kaito Nasu, Yusuke Yamada   +3 more
doaj   +1 more source

Effective SUSY modified after LHC run

, 2012
Some supersymmetric models after the recent LHC reports are discussed. Especially, the light Higgs boson around 125GeV is attempted to be accommodated. An extra Z' from GUTs, and the scalar and pseudoscalar Higgs bosons in supersymmetric extension of the
Kim, Jihn E.
core   +1 more source