Results 51 to 60 of about 430 (123)
Phenomenological Hints from a Class of String Motivated Model Constructions
Advances in High Energy Physics, Volume 2015, Issue 1, 2015., 2015 We use string theory constructions towards the generalisation of the supersymmetric standard model of strong and electroweak interactions. Properties of the models depend crucially on the location of fields in extradimensional compact space. This allows us to extract some generic lessons for the phenomenological properties of the low energy effective ...
Hans Peter Nilles, Michal Malinský
wiley +1 more source
Dynamical prevention of topological defect formation
Journal of High Energy PhysicsTopological defects can have significant cosmological consequences, so their production must be examined carefully. It is usually assumed that topological defects are produced if the temperature becomes sufficiently high, but in reality their formation ...
Junseok Lee +3 more
doaj +1 more source
Journal of High Energy PhysicsWe propose a new scenario to realize the Coleman-Weinberg (CW) type chiral phase transition in the QCD thermal history. This scenario predicts a heavy axionlike particle (ALP) with mass ~ 5 MeV, consistently with the current experimental and cosmological
Zheng-liang Jiang +5 more
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Revisiting axion dark matter with nonlinear transitions
Journal of High Energy PhysicsRecently, two of the present authors showed that even when the axion momentum is much smaller than its mass, the axion can still behave like radiation if its energy density greatly exceeds the maximum potential energy set by the cosine-type potential. In
Max Miyazaki +4 more
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Cosmic clues: DESI, dark energy, and the cosmological constant problem
Journal of High Energy PhysicsSeveral attempts to solve the cosmological constant problem, which concerns the value of the cosmological constant being extremely smaller than the Standard Model mass scales, have introduced a scalar field with a very flat potential that can be ...
Wen Yin
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 +5 more
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Inching toward the QCD axions with axion magnetic resonance in helioscopes
Journal of High Energy PhysicsUtilizing a helical magnet profile to enhance axion-photon conversion showed great promise in laboratory searches for high axion masses. We extend the mechanism, known as the axion-magnetic resonance (AMR), from laser experiments to axion helioscopes and
Hyeonseok Seong, Chen Sun, Seokhoon Yun
doaj +1 more source
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 +3 more
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Resonant Landau-Zener conversion in multi-axion systems
Journal of High Energy PhysicsMultiple axions may emerge in the low-energy effective theory of Nature. Generically, the potentials describing these axion fields are non-diagonal, leading to mass mixing between axion states which can be temperature-dependent due to QCD instanton ...
David I. Dunsky +4 more
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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
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