Results 31 to 40 of about 4,842 (140)
Ultra-relativistic bubbles from the simplest Higgs portal and their cosmological consequences
Journal of High Energy Physics, 2022 We analyze phase transitions in the minimal extension of the SM with a real singlet scalar field. The novelty of our study is that we identify and analyze in detail the region of parameter space where the first order phase transition can occur and in ...
Aleksandr Azatov +4 more
doaj +1 more source
Symmergent Gravity, Seesawic New Physics, and Their Experimental Signatures
Advances in High Energy Physics, Volume 2019, Issue 1, 2019., 2019 The standard model of elementary particles (SM) suffers from various problems, such as power‐law ultraviolet (UV) sensitivity, exclusion of general relativity (GR), and absence of a dark matter candidate. The LHC experiments, according to which the TeV domain appears to be empty of new particles, started sidelining TeV‐scale SUSY and other known cures ...
Durmuş Demir, Michele Arzano
wiley +1 more source
, 2013 We consider the effects of new light species on the Cosmic Microwave Background. In the massless limit, these effects can be parameterized in terms of a single number, the relativistic degrees of freedom.
Brust, Christopher +2 more
core +1 more source
Advances in High Energy Physics, Volume 2018, Issue 1, 2018., 2018 Nonsupersymmetric minimal SU(5) with Higgs representations 24H and 5H and standard fermions in 5¯F⊕10F is well known for its failure in unification of gauge couplings and lack of predicting neutrino masses. Like standard model, it is also affected by the instability of the Higgs scalar potential.
Biswonath Sahoo +3 more
wiley +1 more source
Journal of High Energy Physics, 2022 We investigate the time evolution of the background spacetime during the moduli stabilization process, which is assumed to occur in the radiation dominated era. The setup is basically the Salam-Sezgin model, but we add a potential term for the dilaton in
Hajime Otsuka, Yutaka Sakamura
doaj +1 more source
Cosmological Constraints on Interacting Light Particles
, 2017 Cosmological observations are becoming increasingly sensitive to the effects of light particles in the form of dark radiation (DR) at the time of recombination.
Brust, Christopher +2 more
core +1 more source
Vacuum Energy Sequestering: The Framework and Its Cosmological Consequences [PDF]
, 2014 Recently we suggested a reformulation of General Relativity which completely sequesters from gravity {\it all} of the vacuum energy from a protected matter sector, assumed to contain the Standard Model.
Kaloper, Nemanja, Padilla, Antonio
core +3 more sources
Advances in High Energy Physics, Volume 2018, Issue 1, 2018., 2018 I review the construction of simplified models for dark matter searches. After discussing the philosophy and some simple examples, I turn the attention to the aspect of the theoretical consistency and to the implications of the necessary extensions of these models.
Enrico Morgante, Farinaldo Queiroz
wiley +1 more source
Large spin-2 signals at the cosmological collider
Journal of High Energy Physics, 2022 We study the theory and phenomenology of massive spin-2 fields during the inflation with nonzero background chemical potential, and extend the cosmological collider physics to tensor modes.
Xi Tong, Zhong-Zhi Xianyu
doaj +1 more source
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
core +1 more source