2020
DOI: 10.1016/j.physletb.2019.135149
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Slightly ultra-violet freeze-in a hidden gluonic sector

Abstract: The dark glueball (DGB) from a hidden Yang-Mills sector is a simple non-WIMP dark matter candidate characterized by very few parameters. However, it suffers the over dense issue. To overcome it, in general the dark sector is required to be hierarchically cooler than the visible sector. To naturally generate the desired hierarchy, in this paper we introduce higher dimensional operators coupling the dark gauge field strength tensor to the standard model (SM) Higgs doublets or gauge field strength tensors. By tra… Show more

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Cited by 8 publications
(11 citation statements)
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“…In particular, we consider the Starobinsky inflation, which is motivated from the current CMB observation, and assume a dark sector containing a DM candidate, which automatically suppresses the coupling to the SM particles. We pay particular attention to the case with a dark SU(N ) gauge group whose dark glueball becomes the DM candidate [33][34][35][36][37][38][39]. Interestingly, the inflaton coupling to the dark sector is determined, and hence we have rigid predictions.…”
Section: Jhep09(2021)179mentioning
confidence: 98%
“…In particular, we consider the Starobinsky inflation, which is motivated from the current CMB observation, and assume a dark sector containing a DM candidate, which automatically suppresses the coupling to the SM particles. We pay particular attention to the case with a dark SU(N ) gauge group whose dark glueball becomes the DM candidate [33][34][35][36][37][38][39]. Interestingly, the inflaton coupling to the dark sector is determined, and hence we have rigid predictions.…”
Section: Jhep09(2021)179mentioning
confidence: 98%
“…When the hidden sector is out of equilibrium with the SM in the early universe, a wide variety of possible cosmic histories for dark matter are newly possible, together with avenues for discovery distinct from standard WIMP search strategies. Exotic thermal evolution in a decoupled dark sector can lead to substantial changes in DM properties relative to a traditional WIMP (e.g., [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]). Decoupled dark sectors can also induce early departures from the standard radiation-dominated evolution of the universe [11,20], or admit substantial amounts of relic dark radiation without violating the stringent bounds from Planck, ∆N eff < 0.36 at 95% confidence [2].…”
Section: Jhep08(2019)151mentioning
confidence: 99%
“…In this context, an additional Yang-Mills theory (YMT), which does not or very weakly interacts with the SM particles, is an attractive candidate, since the lightest particle of the spectrum is a glueball , fulfilling the conditions required for being DM [236][237][238][239][240][241][242][243][244][245][246][247][248][249][250][251][252][253][254]. This "dark" YMT may naturally be generated in grand unification frameworks [236,237,245,[255][256][257][258][259][260][261][262][263][264][265][266], and it is possible to experimentally detect them by observing the gravitational wave background [246,[267][268][269][270][271][272][273][274][275][276][277]...…”
Section: Introductionmentioning
confidence: 99%