Results 31 to 40 of about 375 (91)

Cosmic clues: DESI, dark energy, and the cosmological constant problem

Journal of High Energy Physics
Several 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

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

Inching toward the QCD axions with axion magnetic resonance in helioscopes

Journal of High Energy Physics
Utilizing 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

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
doaj   +1 more source

Resonant Landau-Zener conversion in multi-axion systems

Journal of High Energy Physics
Multiple 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, Claudio Andrea Manzari, Pablo Quílez, Maria Ramos, Philip Sørensen   +4 more
doaj   +1 more source

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, Jürgen Rajasalu, Kaspar Selke   +2 more
doaj   +1 more source

Hybrid inflation, reheating and dark radiation in a IIB perturbative moduli stabilization scenario

Journal of High Energy Physics
We study the cosmological implications of an effective field theory model derived within a configuration of D7 brane stacks in the framework of type-IIB string theory.
Waqas Ahmed, Athanasios Karozas, George K. Leontaris, Ilias Tavellaris   +3 more
doaj   +1 more source

The quality/cosmology tension for a post-inflation QCD axion

Journal of High Energy Physics
It is difficult to construct a post-inflation QCD axion model that solves the axion quality problem (and hence the Strong CP problem) without introducing a cosmological disaster. In a post-inflation axion model, the axion field value is randomized during
Qianshu Lu, Matthew Reece, Zhiquan Sun
doaj   +1 more source

Self consistent thermal resummation: a case study of the phase transition in 2HDM

Journal of High Energy Physics
An accurate description of the scalar potential at finite temperature is crucial for studying cosmological first-order phase transitions (FOPT) in the early Universe.
Pedro Bittar, Subhojit Roy, Carlos E. M. Wagner   +2 more
doaj   +1 more source

Detection of early-universe gravitational-wave signatures and fundamental physics. [PDF]

Gen Relativ Gravit, 2022
Caldwell R, Cui Y, Guo HK, Mandic V, Mariotti A, No JM, Ramsey-Musolf MJ, Sakellariadou M, Sinha K, Wang LT, White G, Zhao Y, An H, Bian L, Caprini C, Clesse S, Cline JM, Cusin G, Fornal B, Jinno R, Laurent B, Levi N, Lyu KF, Martinez M, Miller AL, Redigolo D, Scarlata C, Sevrin A, Haghi BSE, Shu J, Siemens X, Steer DA, Sundrum R, Tamarit C, Weir DJ, Xie KP, Yang FW, Zhou S.   +37 more
europepmc   +1 more source