Dark Matter in the Standard Model?

Abstract

We critically reexamine two possible Dark Matter candidate within the Standard Model. First, we consider the $uuddss$ exa-quark. Its QCD binding energy could be large enough to make it (quasi) stable. We show that the cosmological Dark Matter abundance is reproduced thermally if its mass is 1.2 GeV. However, we also find that such mass is excluded by the stability of Oxygen nuclei. Second, we consider the possibility that the instability in the Higgs potential leads to the formation of primordial black holes while avoiding vacuum decay during inflation. We show that the non-minimal Higgs coupling to gravity must be as small as allowed by quantum corrections, $|{\xi }_H|<0.01$. Even so, one must assume that the Universe survived in $e^{120}$ independent regions to fluctuations that lead to vacuum decay with probability 1/2 each.

31 pages, 11 figures. v2: final version to appear on PRD; added comments about arXiv:1805.03723

References in corpus (9)

• Multiquark Resonances
• Primordial Black Holes - Perspectives in Gravitational Wave Astronomy -
• Possible interaction between baryons and dark-matter particles revealed by the first stars
• Femtolensing by Dark Matter Revisited
• Light Nuclei and Hypernuclei from Quantum Chromodynamics in the Limit of SU(3) Flavor Symmetry
• How blind are underground and surface detectors to strongly interacting Dark Matter?
• Lattice QCD study of the $H$ dibaryon using hexaquark and two-baryon interpolators
• Robust Constraints and Novel Gamma-Ray Signatures of Dark Matter That Interacts Strongly With Nucleons
• Search for dinucleon decay into pions at Super-Kamiokande

Cited by in corpus (19)

• Voyager 1 $e^{\pm }$ Further Constrain Primordial Black Holes as Dark Matter
• Constraining primordial black hole abundance with the Galactic 511 keV line
• Weakly bound $H$ dibaryon from SU(3)-flavor-symmetric QCD
• New physics searches with heavy-ion collisions at the LHC
• No room to hide: implications of cosmic-ray upscattering for GeV-scale dark matter
• On the origin of matter in the Universe
• Non-Abelian Vector Dark Matter and Lepton $g-2$
• The Scalar Hexaquark $uuddss$: a Candidate to Dark Matter?
• Primordial Black Holes as Dark Matter through Higgs Criticality
• Search for a Stable Six-Quark State at BABAR
• Dibaryons cannot be the dark matter
• Primordial Black Holes and Scalar-induced Gravitational Waves in Radiative Hybrid Inflation
• A Deeply Bound Dibaryon is Incompatible with Neutron Stars and Supernovae
• Composite Dark Matter and a horizontal symmetry
• On the cosmology and terrestrial signals of sexaquark dark matter
• Observational Probes of the Neutron Star Equation of State with Hyperons, Bosonic Dark Matter, and Quark Matter
• Quark deconfinement in compact stars through sexaquark condensation
• Non-Thermal Production of Sexaquark Dark Matter
• New Physics Hints from Flavour