Constraints on decaying dark matter from weak lensing and cluster counts

Autor: Seshadri Nadathur, Tomo Takahashi, Kari Enqvist, Toyokazu Sekiguchi

Publikováno v: Enqvist, K, Nadathur, S, Sekiguchi, T & Takahashi, T 2020, ' Constraints on decaying dark matter from weak lensing and cluster counts ', Journal of Cosmology and Astroparticle Physics, vol. 2020, no. 04, 015 . https://doi.org/10.1088/1475-7516/2020/04/015

We revisit a cosmological constraint on dark matter decaying into dark radiation at late times. In Enqvist et al. (2015), we mainly focused on the effects of decaying dark matter (DDM) on the cosmic microwave background (CMB) and nonlinear matter pow

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::13a695fee206758b4a98d0d5adbe08b0
http://hdl.handle.net/10138/320503

Higgs-$R^2$ inflation -- full slow-roll study at tree-level

Autor: Kari Enqvist, Syksy Räsänen, Vera-Maria Enckell, Lumi-Pyry Wahlman

We consider Higgs inflation with an $\alpha R^2$ term. It adds a new scalar degree of freedom, which leads to a two-field model of inflation. We do a complete slow-roll analysis of the three-dimensional parameter space of the $R^2$ coefficient $\alph

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::10d311f9e7f091cc4f1c12e6b8a64df9
http://arxiv.org/abs/1812.08754

A novel way to determine the scale of inflation

Autor: David Wands, Vincent Vennin, Kari Enqvist, Tommi Tenkanen, Robert J. Hardwick

Publikováno v: JCAP
JCAP, 2018, 02, pp.006. ⟨10.1088/1475-7516/2018/02/006⟩
JCAP, 2018, 02 (02), pp.006. 〈10.1088/1475-7516/2018/02/006〉
Journal of Cosmology and Astroparticle Physics
Enqvist, K, Hardwick, R J, Tenkanen, T, Vennin, V & Wands, D 2018, ' A novel way to determine the scale of inflation ', Journal of Cosmology and Astroparticle Physics, vol. 2018, 006 . https://doi.org/10.1088/1475-7516/2018/02/006

We show that in the Feebly Interacting Massive Particle (FIMP) model of Dark Matter (DM), one may express the inflationary energy scale $H_*$ as a function of three otherwise unrelated quantities, the DM isocurvature perturbation amplitude, its mass

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ccf08c5e70c02a212f209e78dee09493
https://hal.archives-ouvertes.fr/hal-01707648

Observational signatures of Higgs inflation

Autor: Sami Nurmi, Vera-Maria Enckell, Kari Enqvist

We investigate the dependency of Higgs inflation on the non-renormalisable matching between the low energy Standard Model limit and the inflationary regime at high energies. We show that for the top mass range $m_t \gtrsim 171.8$ GeV the scenario rob

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::456028d8f040b64a6cfb369efca11e50

Lattice Calculation of the Decay of Primordial Higgs Condensate

Autor: Stanislav Rusak, David J. Weir, Kari Enqvist, Sami Nurmi

We study the resonant decay of the primordial Standard Model Higgs condensate after inflation into $SU(2)$ gauge bosons on the lattice. We find that the non-Abelian interactions between the gauge bosons quickly extend the momentum distribution toward

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2bdb70ddf19c555cf1d79c9441f575cd
http://arxiv.org/abs/1506.06895