Axion-like particles implications for high-energy astrophysics

G Galanti, M Roncadelli - Universe, 2022 - mdpi.com
We offer a pedagogical introduction to axion-like particles (ALPs) as far as their relevance
for high-energy astrophysics is concerned, from a few MeV to 1000 TeV. This review is self …

keV neutrino model building

A Merle - International Journal of Modern Physics D, 2013 - World Scientific
We review the model building aspects for keV sterile neutrinos as Dark Matter (DM)
candidates. After giving a brief discussion of some cosmological, astrophysical and …

Relevance of axionlike particles for very-high-energy astrophysics

A De Angelis, G Galanti, M Roncadelli - Physical Review D—Particles, Fields …, 2011 - APS
Several extensions of the standard model and, in particular, superstring theories suggest the
existence<? format?> of axionlike particles (ALPs), which are very light spin-zero bosons …

Hardening of TeV gamma spectrum of active galactic nuclei in galaxy clusters<? format?> by conversions of photons into axionlike particles

D Horns, L Maccione, M Meyer, A Mirizzi… - Physical Review D …, 2012 - APS
A fraction of active galactic nuclei producing very high-energy (VHE) γ rays are located in
galaxy clusters. The magnetic field present in the intracluster medium would lead to …

Dynamical dark matter. II. An explicit model

KR Dienes, B Thomas - Physical Review D—Particles, Fields, Gravitation, and …, 2012 - APS
In a recent paper [KR Dienes and B. Thomas, Phys. Rev. D 85, 083523 (2012). PRVDAQ
1550-7998], we introduced “dynamical dark matter,” a new framework for dark-matter …

Evidence for an axion-like particle from PKS 1222<? format?>+<? format?> 216?

F Tavecchio, M Roncadelli, G Galanti, G Bonnoli - Physical Review D …, 2012 - APS
The surprising discovery by Major Atmospheric Gamma Imaging Cherenkov Telescope
(MAGIC) of an intense, rapidly varying emission in the energy range 70–400 GeV from the …

A supersymmetric SU (5)<? format?>×<? format?> T′ unified model of flavor with large θ 13

A Meroni, ST Petcov, M Spinrath - … Review D—Particles, Fields, Gravitation, and …, 2012 - APS
We present a SUSY SU (5)× T′ unified flavor model with type I seesaw mechanism of
neutrino mass generation, which predicts the reactor neutrino angle to be θ 13≈ 0.14 close …

Stop-neutralino coannihilation in the light of the LHC

MA Ajaib, T Li, Q Shafi - Physical Review D—Particles, Fields, Gravitation, and …, 2012 - APS
We employ the ATLAS search results for events containing jets and large missing transverse
momentum, corresponding to an integrated luminosity of 1 fb-1, to investigate the …

A predictive Yukawa unified SO (10) model: Higgs and sparticle masses

MA Ajaib, I Gogoladze, Q Shafi, CS Ün - Journal of High Energy Physics, 2013 - Springer
A bstract We revisit a class of supersymmetric SO (10) models with tb-τ Yukawa coupling
unification condition, with emphasis on the prediction of the Higgs mass. We discuss …

Yukawa unification and neutralino dark matter in

I Gogoladze, R Khalid, Q Shafi - … Review D—Particles, Fields, Gravitation, and …, 2009 - APS
We consider a left-right symmetric SU (4) c× SU (2) L× SU (2) R (4-2-2) model with gravity
mediated supersymmetry breaking. We find that with 4-2-2 compatible nonuniversal gaugino …