Gauge singlet scalars as cold dark matter
WebPseudoscalars appear frequently in particle spectra. They can be light if they appear as pseudo-Goldstone bosons from some spontaneously broken global symmetries with the decay constant f. Since any global symmetry is broken at least by quantum gravitational effects, all pseudoscalars are massive. The mass scale of a pseudoscalar is determined … WebJan 8, 2024 · [28] J. McDonald, Gauge singlet scalars as cold dark matter, Phys. Rev. D 50, 3637 (1994). ... both scalars contribute to the dark matter relic density, but only one of them takes part in the ...
Gauge singlet scalars as cold dark matter
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WebIn light of recent interest in minimal extensions of the Standard Model and gauge singlet scalar cold dark matter, we provide an arXiv preprint of the paper, published as … WebMar 17, 1994 · We consider the possibility of using a gauge singlet scalar as the source of the additional CP violation needed to allow the observed baryon (B) ... In this case the …
WebIn light of recent interest in minimal extensions of the Standard Model and gauge singlet scalar cold dark matter, we provide an arXiv preprint of the paper, published as … WebDec 10, 2024 · The simplest extension of the Standard Model by only one real singlet scalar can explain the observed dark matter relic density while giving simultaneously a strongly first-order electroweak phase transition in the early universe. However, after imposing the invisible Higgs decay constraint from the LHC, the parameter space of the single scalar …
WebEnter the email address you signed up with and we'll email you a reset link. Webgauge singlet complex scalars S i. These scalars, if stable, can in principle account for a density of CDM. Stability of the scalars can most simply be guaranteed if a continuous …
WebSep 4, 1997 · The Higgs boson may serve as a portal to new physics beyond the standard model (BSM), which is implied by the theoretical naturalness or experimental anomalies. This review aims to briefly survey some typical Higgs-related BSM models. First, for the theories to solve the hierarchy problem, the two exemplary theories, the low energy …
WebAlthough gauge singlet scalars might account for cold dark matter, and more specif-ically for SIDM, it is necessary to explain how a critical density of gauge singlet scalars with the right properties could arise. The simplest and most natural way for a particle density to arise is by thermal generation. Therefore in the following we will ... bosch motorcycle battery fitment guideWebEnter the email address you signed up with and we'll email you a reset link. hawaiian electric light coWebFeb 24, 2024 · In the framework of U(1)XSSM, we study the Higgs mass and take the lightest CP-even sneutrino as a cold dark matter candidate. For the lightest CP-even sneutrino, the relic density and the cross section for dark matter scattering off nucleon are both researched. ... Gauge singlet scalars as cold dark matter, Phys. Rev. D 50 … hawaiian electric lemon barsWebJan 11, 2024 · The present-day B -anomalies involving b → sμ+μ− or b → cτ− \overline {\nu} transitions can all be explained with the addition of a vector U1 leptoquark with a mass of {M}_ {U_1} ≳ 1. 8 TeV. In the scalar singlet dark matter model (SSDMM), the DM is a scalar S that couples to the Higgs via λhS S2 H 2. We update the fit to the data ... bosch motorcycle headlightWebMar 23, 2016 · As a first step, we study one of the simple cases of the minimal composition in the well-tempered fermionic WIMP regime, namely the singlet-doublets WIMP model. We consider all available constraints from direct and indirect searches and also the predicted constraints coming from the near future and the future experiments. hawaiian electric meatloafWebNov 14, 2024 · We build a model containing two scalar doublets and a scalar singlet with a specific discrete symmetry. After spontaneous symmetry breaking, the model has Standard Model-like phenomenology, as well as a hidden scalar sector which provides a viable dark matter candidate. We show that CP violation in the scalar sector occurs exclusively in … hawaiian electric make a paymentWebSep 15, 1994 · The U.S. Department of Energy's Office of Scientific and Technical Information bosch motorcycle battery