%0 Journal Article
%T MSSM-inflation revisited: Towards a coherent description of high-energy physics and cosmology
%+ Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab)
%+ Laboratoire Charles Coulomb (L2C)
%+ Laboratoire Univers et Particules de Montpellier (LUPM)
%+ Cosmologie et Gravitation
%A Weymann-Despres, Gilles
%A Henrot-Versillé, Sophie
%A Moultaka, Gilbert
%A Vennin, Vincent
%A Duflot, Laurent
%A von Eckardstein, Richard
%< avec comité de lecture
%@ 1550-7998
%J Physical Review D
%I American Physical Society
%V 108
%N 2
%P 023511
%8 2023
%D 2023
%Z 2304.04534
%R 10.1103/PhysRevD.108.023511
%K scale
%K inflation
%K operator
%K nonrenormalizable
%K dark matter
%K annihilation
%K Higgs particle
%K mass
%K energy
%K density
%K minimal supersymmetric standard model
%K coherence
%K power spectrum
%K tree approximation
%K flat direction
%K fluctuation
%K reheating
%K Higgsino
%K CERN LHC Coll
%K renormalization group
%K cosmological model
%Z Physics [physics]/High Energy Physics - Phenomenology [hep-ph]
%Z Physics [physics]/Astrophysics [astro-ph]
%Z Physics [physics]/High Energy Physics - Theory [hep-th]Journal articles
%X The aim of this paper is to highlight the challenges and potential gains surrounding a coherent description of physics from the high-energy scales of inflation down to the lower energy scales probed in particle-physics experiments. As an example, we revisit the way inflation can be realised within an effective Minimal Supersymmetric Standard Model (eMSSM), in which the $LLe$ and $udd$ flat directions are lifted by the combined effect of soft-supersymmetric-breaking masses already present in the MSSM, together with the addition of effective non-renormalizable operators. We clarify some features of the model and address the question of the one-loop Renormalization Group improvement of the inflationary potential, discussing its impact on the fine-tuning of the model. We also compare the parameter space that is compatible with current observations (in particular the amplitude, $A_{\scriptscriptstyle{\mathrm{S}}}$, and the spectral index, $n_{\scriptscriptstyle{\mathrm{S}}}$, of the primordial cosmological fluctuations) at tree level and at one loop, and discuss the role of reheating. Finally we perform combined fits of particle and cosmological observables (mainly $A_{\scriptscriptstyle{\mathrm{S}}}$, $n_{\scriptscriptstyle{\mathrm{S}}}$, the Higgs mass, and the cold-dark-matter energy density) with the one-loop inflationary potential applied to some examples of dark-matter annihilation channels (Higgs-funnel, Higgsinos and A-funnel), and discuss the status of the ensuing MSSM spectra with respect to the LHC searches.
%G English
%L hal-04080642
%U https://hal.science/hal-04080642
%~ IN2P3
%~ ENS-PARIS
%~ CNRS
%~ L2C
%~ LUPM
%~ PSL
%~ UNIV-PARIS-SACLAY
%~ MIPS
%~ UNIV-MONTPELLIER
%~ SORBONNE-UNIVERSITE
%~ SORBONNE-UNIV
%~ LPENS
%~ IJCLAB
%~ UNIV-PARIS
%~ UNIVERSITE-PARIS
%~ UP-SCIENCES
%~ ENS-PSL
%~ UNIVERSITE-PARIS-SACLAY
%~ SU-TI
%~ GS-PHYSIQUE
%~ INSTITUT-SCIENCES-LUMIERE
%~ ALLIANCE-SU
%~ UM-2015-2021
%~ UM-EPE