Zobrazeno 1 - 10
of 3 345
pro vyhledávání: '"Laine, M"'
Publikováno v:
JCAP 10 (2024) 040
If the inflaton is a heavy scalar field, it may equilibrate slower than some other degrees of freedom, e.g. non-Abelian gauge bosons. In this case, perturbations in the inflaton field and in a thermal plasma coexist from a given moment onwards. We de
Externí odkaz:
http://arxiv.org/abs/2407.17074
Publikováno v:
JHEP 06 (2024) 205
We determine the resummed 1-loop correction to a baryonic thermal screening mass. The calculation is carried out in the framework of a dimensionally reduced effective theory, where quarks are heavy fields due to their non-zero Matsubara frequencies.
Externí odkaz:
http://arxiv.org/abs/2405.03975
Autor:
Eriksson, M., Laine, M.
Publikováno v:
JCAP 06 (2024) 016
We estimate the equilibration rate of a nearly homogeneous Higgs field, displaced from its ground state during the onset of an electroweak phase transition. The computation is carried out with Hard Thermal Loop resummed perturbation theory, and a sig
Externí odkaz:
http://arxiv.org/abs/2404.06116
Publikováno v:
JCAP 04 (2024) 062
The thermal plasma filling the early universe generated a stochastic gravitational wave background that peaks in the microwave frequency range today. If the graviton production rate is expressed as a series in a fine-structure constant, $\alpha$, and
Externí odkaz:
http://arxiv.org/abs/2401.08766
Autor:
Jackson, G., Laine, M.
Publikováno v:
JHEP 05 (2024) 089
Motivated by precision computations of neutrino decoupling at MeV temperatures, we show how QED corrections to the thermal neutrino interaction rate can be related to the electron-positron spectral function as well as an effective $\bar{\nu}\nu\gamma
Externí odkaz:
http://arxiv.org/abs/2312.07015
Autor:
Kolesova, H., Laine, M.
Publikováno v:
Phys.Lett.B 851 (2024) 138553
In view of recent interest in high-frequency detectors, broad features of gravitational wave signals from phase transitions taking place soon after inflation are summarized. The influence of the matter domination era that follows the slow-roll stage
Externí odkaz:
http://arxiv.org/abs/2311.03718
The free propagator of a massless mode in an expanding universe can be written as a sum of two terms, a lightcone and a tail part. The latter describes a subluminal (time-like) signal. We show that the inflationary gravitational wave background, infl
Externí odkaz:
http://arxiv.org/abs/2303.17985
Publikováno v:
JHEP 05 (2023) 239
Taking axion inflation as an example, we estimate the maximal temperature ($T_{\rm max}^{ }$) that can be reached in the post-inflationary universe, as a function of the confinement scale of a non-Abelian dark sector ($\Lambda_{\rm IR}^{ }$). Below a
Externí odkaz:
http://arxiv.org/abs/2303.17973
Autor:
Kim, Seyong, Laine, M.
Publikováno v:
JCAP 05 (2023) 003
Recently it has been questioned, notably in the context of the scalar singlet dark matter model with $m_\varphi^{ }\simeq 60$ GeV, how efficiently kinetic equilibrium is maintained if freeze-out dynamics is pushed down to low temperatures by resonant
Externí odkaz:
http://arxiv.org/abs/2302.05129
Autor:
Laine, M.
Publikováno v:
JHEP 01 (2023) 157
Studies of dark matter annihilation through an $s$-channel resonance are often based on recipes such as a narrow width approximation or real intermediate state subtraction. We review a recipe-free formalism that can be implemented at the NLO level in
Externí odkaz:
http://arxiv.org/abs/2211.06008