Results 51 to 60 of about 465 (109)
Non-linear stability of α′-corrected Friedmann equations
Journal of High Energy Physics, 2023 We study the non-linear stability of fixed-point solutions to the α′-exact equations from O(d, d) invariant cosmology, with and without matter perturbations.
Heliudson Bernardo +2 more
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Cosmological Perturbations in Double Field Theory
Journal of High Energy Physics, 2023 We explore perturbative double field theory about time-dependent (cosmological) backgrounds to cubic order. To this order the theory is consistent in a weakly constrained sense, so that for a toroidal geometry it encodes both momentum and genuine winding
Olaf Hohm, Allison F. Pinto
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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
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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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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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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
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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
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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
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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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Multiple point criticality principle and Coleman-Weinberg inflation
Journal of High Energy Physics, 2022 We apply the multiple point criticality principle to inflationary model building and study Coleman-Weinberg inflation when the scalar potential is quadratic in the logarithmic correction.
Antonio Racioppi +2 more
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