Origin of matter in the universe

Abstract

We extend the standard model with two iso-singlet color triplet scalars, one singlet real scalar and one singlet fermion. The new fields are odd under an unbroken Z_2 discrete symmetry while the standard model particles are even. The decays of the singlet real scalar into three standard model quarks (antiquarks) with three singlet antifermions (fermions), which explicitly violate the baryon number, will become effective after the electroweak phase transition and then produce the observed baryon asymmetry in the universe through the loop diagram involving the exchange of the W gauge boson. The singlet fermion can serve as the candidate for cold dark matter. In our model, all new particles with masses below the TeV scale can be detected by the forthcoming collider experiments or the next generation experiments for neutron-antineutron oscillations.

6 pages, 7 figures. Comment on proton decay improved. Accepted by PLB

References in corpus (5)

• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• The Cosmological Parameters 2006
• Post--Sphaleron Baryogenesis
• Search for Neutron-Antineutron Oscillations Using Multiprong Events in Soudan 2
• Unified TeV Scale Picture of Baryogenesis and Dark Matter

Cited by in corpus (15)

• On Relating the Genesis of Cosmic Baryons and Dark Matter
• Baryon Destruction by Asymmetric Dark Matter
• Pangenesis in a Baryon-Symmetric Universe: Dark and Visible Matter via the Affleck-Dine Mechanism
• Visible and dark matter from a first-order phase transition in a baryon-symmetric universe
• Dark Matter Induced Nucleon Decay: Model and Signatures
• Affleck-Dine dynamics and the dark sector of pangenesis
• Neutrino masses, leptogenesis and dark matter in hybrid seesaw
• Baryogenesis and neutron-antineutron oscillation at TeV
• Dark Matter Antibaryons from a Supersymmetric Hidden Sector
• Two radiative inverse seesaw models, dark matter, and baryogenesis
• Unified picture for Dirac neutrinos, dark matter, dark energy and matter-antimatter asymmetry
• Gravitationally Induced Dark Matter Asymmetry and Dark Nucleon Decay
• Indirect Detection Signatures for the Origin of Asymmetric Dark Matter
• High-scale baryogenesis with testable neutron-antineutron oscillation and dark matter
• Unified origin for visible and dark matter in a baryon-symmetric universe from a first-order phase transition