Gauge singlet scalar as inflaton and thermal relic dark matter

By R. Lerner, J. McDonald. 2009

235 citations recorded by the source corpus.

We show that, by adding a gauge singlet scalar S to the standard model which is nonminimally coupled to gravity, S can act both as the inflaton and as thermal relic dark matter. We obtain the allowed region of the (m_s, m_h) parameter space which gives a spectral index in agreement with observational bounds and also produces the observed dark matter density while not violating vacuum stability or nonperturbativity constraints. We show that, in contrast to the case of Higgs inflation, once quantum corrections are included the spectral index is significantly larger than the classical value (n = 0.966 for N = 60) for all allowed values of the Higgs mass m_h. The range of Higgs mass compatible with the constraints is 145 GeV SS, while future direct dark matter searches should be able to significantly constrain the model.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/ee98d7a6a8a9bc374ebefb44f3540e3fe21226ca

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Citations in the corpus

$Z_3$ Scalar Singlet Dark Matter (2012, unknown): “The model is perturbative [19] if |λS | 6 π and |λSH | 6 4π.”
Vacuum stability, perturbativity, and scalar singlet dark matter (2009, background): “[11, 21, 23, 24]) where m(2)h = 2λv 2 0, the coupling λ is a factor of six smaller than our coupling λ.”
Violent preheating in inflation with nonminimal coupling (2016, background): “For example, a gauge-singlet scalar dark matter [12, 13], or U(1)B−L Higgs [14] as an inflaton has been considered.”
Inflation with non-minimal gravitational couplings in supergravity (2009, unknown): “[14, 15] by adding a singlet to the standard model.”
Benchmarks for dark matter searches at the LHC (2014, background): “The case of DM that couples to the SM sector only though interactions with the Higgs boson has been discussed extensively in the literature [65–86].”
Stabilization of the electroweak vacuum by a scalar threshold effect (2012, methodology): “Concerning the RG evolution of couplings above the sigma-field threshold, we follow [54, 55] and take into account the effects of a non-minimal coupling to gravity of the”
On inflation with non-minimal coupling (2010, background): “Various attempts have been made at addressing whether quantum corrections spoil the validity of these non-minimal models of inflation due to the ξφ2R term; see [6, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28].”
Dark Matter through the Higgs portal (2019, background): “If the DM particle is not charged under the electroweak group, the Higgs sector of the theory allows to accommodate in a minimal way the interaction among pairs of DM and of SM particles [51–91].”
Standard Model—axion—seesaw—Higgs portal inflation. Five problems of particle physics and cosmology solved in one stroke (2016, methodology): “In order to study the properties of inflation along the three possible directions in field space, it is convenient to work with redefined fields χρ and χh defined as follows, see for instance [72]:”