Results 11 to 20 of about 21,978 (196)

Non-metric geometry as the origin of mass in gauge theories of scale invariance [PDF]

open access: yesThe European Physical Journal C, 2022
We discuss gauge theories of scale invariance beyond the Standard Model (SM) and Einstein gravity. A consequence of gauging this symmetry is that their underlying 4D geometry is non-metric ( $$\nabla _\mu g_{\alpha \beta }\!\not =\!0$$ ∇ μ g α β ≠ 0 ...
D. Ghilencea
semanticscholar   +1 more source

Axion-like particles as mediators for dark matter: beyond freeze-out [PDF]

open access: yesJournal of High Energy Physics, 2022
We consider an axion-like particle (ALP) coupled to Standard Model (SM) fermions as a mediator between the SM and a fermionic dark matter (DM) particle.
A. Bharucha, Nishita, Desai, S. Mutzel
semanticscholar   +1 more source

Can we explain cosmic birefringence without a new light field beyond Standard Model? [PDF]

open access: yesJournal of High Energy Physics, 2023
The recent analysis of the Planck 2018 polarization data shows a nonzero isotropic cosmic birefringence (ICB) that is not explained within the ΛCDM paradigm.
Yuichiro Nakai   +4 more
semanticscholar   +1 more source

Euclid preparation. XLIV. Modelling spectroscopic clustering on mildly nonlinear scales in beyond-LCDM models [PDF]

open access: yesAstronomy & Astrophysics, 2023
The space satellite mission will measure the large-scale clustering of galaxies at an unprecedented precision, providing a unique probe of modifications to the Lambda CDM model.
Euclid Collaboration B. Bose   +499 more
semanticscholar   +1 more source

Searching for long-lived particles beyond the Standard Model at the Large Hadron Collider [PDF]

open access: yesJournal of Physics G: Nuclear and Particle Physics, 2019
Particles beyond the Standard Model (SM) can generically have lifetimes that are long compared to SM particles at the weak scale. When produced at experiments such as the Large Hadron Collider (LHC) at CERN, these long-lived particles (LLPs) can decay ...
J. Alimena   +334 more
semanticscholar   +1 more source

Constraints on Supersymmetry from relic density compared with future Higgs searches at the LHC [PDF]

open access: yes, 2010
Among the theories beyond the Standard Model (SM) of particle physics Supersymmetry (SUSY) provides an excellent dark matter (DM) candidate, the neutralino.
C. Beskidt   +8 more
semanticscholar   +1 more source

Inflation in symmergent metric-Palatini gravity [PDF]

open access: yesJournal of Cosmology and Astroparticle Physics, 2023
In this paper, we study the cosmological inflation phenomenon in symmergent gravity theory. Symmergent gravity is a novel framework which merges gravity and the standard model (SM) so that the gravity emerges from the matter loops and restores the broken
N. Bostan, Canan Karahan, Ozan Sargın
semanticscholar   +1 more source

Filtered asymmetric dark matter during the Peccei-Quinn phase transition

open access: yesJournal of High Energy Physics, 2021
In this paper, we propose a bubble filtering-out mechanism for an asymmetric dark matter scenario during the Peccei-Quinn (PQ) phase transition. Based on a QCD axion model, extended by extra chiral neutrinos, we show that the PQ phase transition can be ...
M. Ahmadvand
doaj   +1 more source

Bound states of WIMP dark matter in Higgs-portal models. Part II. Thermal decoupling

open access: yesJournal of High Energy Physics, 2021
The Higgs doublet can mediate a long-range interaction between multi-TeV particles coupled to the Weak interactions of the Standard Model, while its emission can lead to very rapid bound-state formation processes and bound-to-bound transitions. Using the
Ruben Oncala, Kalliopi Petraki
doaj   +1 more source

Unification of the standard model and dark matter sectors in [SU(5) × U(1)]4

open access: yesJournal of High Energy Physics, 2019
A simple model of dark matter contains a light Dirac field charged under a hidden U(1) gauge symmetry. When a chiral matter content in a strong dynamics satisfies the t’Hooft anomaly matching condition, a massless baryon is a natural candidate of the ...
Ayuki Kamada   +2 more
doaj   +1 more source

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