Matches in SemOpenAlex for { <https://semopenalex.org/work/W2946696330> ?p ?o ?g. }
- W2946696330 abstract "We explore the possibility that the dark-matter relic abundance is generated in a context where the inflaton is the only mediator between the visible and the hidden sectors of our universe. Due to the relatively large mass of the inflaton field, such a portal leads to an extremely feeble interaction between the dark and the visible sectors suggesting that the dark sector cannot reach any thermal equilibrium with the visible sector. After the two sectors are populated by the decay of the inflaton, a heavy dark-matter particle thermally decouples within the dark sector. Later, a lighter dark particle, whose decay width is naturally suppressed by the inflaton propagator, decays into the visible sector after it dominates the energy density of universe. This process dilutes the dark-matter relic density by injecting entropy in the visible sector. We show that an inflaton mass of $mathcal{O}(10^{13})$ GeV together with couplings of order one are fully compatible with a dark-matter relic abundance $Omega h^2sim 0.1$. As a general feature of the model, the entropy dilution mechanism is accompanied by a period of early matter domination, which modifies the amount of e-folds of inflation necessary to accommodate Planck data. Moreover, the coupling of the inflaton to the dark and visible sectors brings loop contributions to the inflationary potential which can destabilize the inflation trajectory. Considering all these complementary constraints, we show that, in the context of a plateau-inflation scenario such as the $alpha$-attractor model, the inflaton can constitute a viable mediator between the visible sector and a $sim 10$ EeV dark-matter candidate. Furthermore, we show that improved constraints on the tensor-to-scalar ratio and spectral index could potentially rule out dark-matter scenarios of this sort in the future." @default.
- W2946696330 created "2019-05-29" @default.
- W2946696330 creator A5002401134 @default.
- W2946696330 creator A5059428459 @default.
- W2946696330 date "2019-08-05" @default.
- W2946696330 modified "2023-10-12" @default.
- W2946696330 title "Inflaton portal to a highly decoupled EeV dark matter particle" @default.
- W2946696330 cites W1489594688 @default.
- W2946696330 cites W1491015874 @default.
- W2946696330 cites W1539212645 @default.
- W2946696330 cites W1598401242 @default.
- W2946696330 cites W1601474788 @default.
- W2946696330 cites W1664050032 @default.
- W2946696330 cites W1760892277 @default.
- W2946696330 cites W1799850470 @default.
- W2946696330 cites W1923184722 @default.
- W2946696330 cites W1960968774 @default.
- W2946696330 cites W1965586140 @default.
- W2946696330 cites W1968174670 @default.
- W2946696330 cites W1982882199 @default.
- W2946696330 cites W1984272785 @default.
- W2946696330 cites W1984543426 @default.
- W2946696330 cites W1986669506 @default.
- W2946696330 cites W1987543943 @default.
- W2946696330 cites W2002355448 @default.
- W2946696330 cites W2007403924 @default.
- W2946696330 cites W2007443706 @default.
- W2946696330 cites W2019216473 @default.
- W2946696330 cites W2019605373 @default.
- W2946696330 cites W2027433690 @default.
- W2946696330 cites W2028240436 @default.
- W2946696330 cites W2029010726 @default.
- W2946696330 cites W2031749655 @default.
- W2946696330 cites W2033486725 @default.
- W2946696330 cites W2036021094 @default.
- W2946696330 cites W2037251137 @default.
- W2946696330 cites W2037747761 @default.
- W2946696330 cites W2042225458 @default.
- W2946696330 cites W2051217390 @default.
- W2946696330 cites W2052248876 @default.
- W2946696330 cites W2056128073 @default.
- W2946696330 cites W2056325701 @default.
- W2946696330 cites W2056811458 @default.
- W2946696330 cites W2057037672 @default.
- W2946696330 cites W2058428180 @default.
- W2946696330 cites W2059175117 @default.
- W2946696330 cites W2063223573 @default.
- W2946696330 cites W2063281527 @default.
- W2946696330 cites W2066198660 @default.
- W2946696330 cites W2066431612 @default.
- W2946696330 cites W2075044451 @default.
- W2946696330 cites W2085101728 @default.
- W2946696330 cites W2098995349 @default.
- W2946696330 cites W2103022510 @default.
- W2946696330 cites W2122765019 @default.
- W2946696330 cites W2132436651 @default.
- W2946696330 cites W2164063481 @default.
- W2946696330 cites W2164104914 @default.
- W2946696330 cites W2165090377 @default.
- W2946696330 cites W2167416085 @default.
- W2946696330 cites W2169911569 @default.
- W2946696330 cites W2170963768 @default.
- W2946696330 cites W2202253532 @default.
- W2946696330 cites W2224114398 @default.
- W2946696330 cites W2245603897 @default.
- W2946696330 cites W2274966885 @default.
- W2946696330 cites W2288209068 @default.
- W2946696330 cites W2290447087 @default.
- W2946696330 cites W2409233362 @default.
- W2946696330 cites W2414577224 @default.
- W2946696330 cites W2464613418 @default.
- W2946696330 cites W2473087942 @default.
- W2946696330 cites W2478818027 @default.
- W2946696330 cites W2516823312 @default.
- W2946696330 cites W2520210929 @default.
- W2946696330 cites W2528146815 @default.
- W2946696330 cites W2564153216 @default.
- W2946696330 cites W2582972798 @default.
- W2946696330 cites W2590853306 @default.
- W2946696330 cites W2593430608 @default.
- W2946696330 cites W2625068651 @default.
- W2946696330 cites W2738454963 @default.
- W2946696330 cites W2739855498 @default.
- W2946696330 cites W2740043820 @default.
- W2946696330 cites W2742743959 @default.
- W2946696330 cites W2753811597 @default.
- W2946696330 cites W2765886185 @default.
- W2946696330 cites W2766882470 @default.
- W2946696330 cites W2768812899 @default.
- W2946696330 cites W2771913260 @default.
- W2946696330 cites W2773425370 @default.
- W2946696330 cites W2779705519 @default.
- W2946696330 cites W2783693973 @default.
- W2946696330 cites W2792404656 @default.
- W2946696330 cites W2795371480 @default.
- W2946696330 cites W2798840738 @default.
- W2946696330 cites W2806264860 @default.
- W2946696330 cites W2806988153 @default.
- W2946696330 cites W2810678360 @default.
- W2946696330 cites W2884179963 @default.