Unified TeV Scale Picture of Baryogenesis and Dark Matter
Abstract
We present a simple extension of the minimal supersymmetric standard model which provides a unified picture of cosmological baryon asymmetry and dark matter. Our model introduces a gauge singlet field N and a color triplet field X which couple to the right-handed quark fields. The out-of-equilibrium decay of the Majorana fermion N mediated by the exchange of the scalar field X generates adequate baryon asymmetry for M{sub N}{approx}100 GeV and M{sub X}{approx}TeV. The scalar partner of N (denoted N-tilde{sub 1}) is naturally the lightest SUSY particle as it has no gauge interactions and plays the role of dark matter. The model is experimentally testable in (i) neutron-antineutron oscillations with a transition time estimated to be around 10{sup 10}sec (ii) discovery of colored particles X at LHC with mass of order TeV, and (iii) direct dark matter detection with a predicted cross section in the observable range.
- Authors:
- Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078 (United States)
- Department of Physics, University of Maryland, College Park, Maryland 20742 (United States)
- Department of Physics, University of Florida, Gainesville, Florida 32611 (United States)
- Publication Date:
- OSTI Identifier:
- 20951246
- Resource Type:
- Journal Article
- Resource Relation:
- Journal Name: Physical Review Letters; Journal Volume: 98; Journal Issue: 16; Other Information: DOI: 10.1103/PhysRevLett.98.161301; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; BARYONS; CERN LHC; COLOR MODEL; CROSS SECTIONS; GEV RANGE 100-1000; MAJORANA THEORY; NEUTRON-ANTINEUTRON INTERACTIONS; NONLUMINOUS MATTER; PARTICLE DECAY; PARTICLE PRODUCTION; QUARKS; SCALAR FIELDS; SPARTICLES; STANDARD MODEL; SUPERSYMMETRY; TEV RANGE 01-10; TRIPLETS
Citation Formats
Babu, K. S., Mohapatra, R. N., and Nasri, Salah. Unified TeV Scale Picture of Baryogenesis and Dark Matter. United States: N. p., 2007.
Web. doi:10.1103/PHYSREVLETT.98.161301.
Babu, K. S., Mohapatra, R. N., & Nasri, Salah. Unified TeV Scale Picture of Baryogenesis and Dark Matter. United States. doi:10.1103/PHYSREVLETT.98.161301.
Babu, K. S., Mohapatra, R. N., and Nasri, Salah. Fri .
"Unified TeV Scale Picture of Baryogenesis and Dark Matter". United States.
doi:10.1103/PHYSREVLETT.98.161301.
@article{osti_20951246,
title = {Unified TeV Scale Picture of Baryogenesis and Dark Matter},
author = {Babu, K. S. and Mohapatra, R. N. and Nasri, Salah},
abstractNote = {We present a simple extension of the minimal supersymmetric standard model which provides a unified picture of cosmological baryon asymmetry and dark matter. Our model introduces a gauge singlet field N and a color triplet field X which couple to the right-handed quark fields. The out-of-equilibrium decay of the Majorana fermion N mediated by the exchange of the scalar field X generates adequate baryon asymmetry for M{sub N}{approx}100 GeV and M{sub X}{approx}TeV. The scalar partner of N (denoted N-tilde{sub 1}) is naturally the lightest SUSY particle as it has no gauge interactions and plays the role of dark matter. The model is experimentally testable in (i) neutron-antineutron oscillations with a transition time estimated to be around 10{sup 10}sec (ii) discovery of colored particles X at LHC with mass of order TeV, and (iii) direct dark matter detection with a predicted cross section in the observable range.},
doi = {10.1103/PHYSREVLETT.98.161301},
journal = {Physical Review Letters},
number = 16,
volume = 98,
place = {United States},
year = {Fri Apr 20 00:00:00 EDT 2007},
month = {Fri Apr 20 00:00:00 EDT 2007}
}
-
We propose a unified scenario of two puzzles in particle physics and cosmology, namely, the dark matter and the origin of the baryon asymmetry of the universe in a simple extension of MSSM. Our model uses a gauge singlet chiral superfield field N, where the out-of equilibrium decay of the fermionic partner of N mediated by the exchange of a colored TeV scale scalar field generates adequate baryon asymmetry for M{sub N}{approx}100 GeV. The scalar partner of N is naturally the lightest SUSY particle as it has no gauge interactions and plays the role of dark matter. The model ismore »
-
Predictive model for dark matter, dark energy, neutrino masses, and leptogenesis at the TeV scale
We propose a new mechanism of TeV scale leptogenesis where the chemical potential of right-handed electrons is passed on to the B-L asymmetry of the Universe in the presence of sphalerons. The model has the virtue that the origin of neutrino masses is independent of the scale of leptogenesis. As a result, the model could be extended to explain dark matter, dark energy, neutrino masses, and leptogenesis at the TeV scale. The most attractive feature of this model is that it predicts a few hundred GeV triplet Higgs scalar that can be tested at LHC or the International Linear Collider. -
Unified brane gravity: Cosmological dark matter from a scale dependent Newton constant
We analyze, within the framework of unified brane gravity, the weak-field perturbations caused by the presence of matter on a 3-brane. Although deviating from the Randall-Sundrum approach, the masslessness of the graviton is still preserved. In particular, the four-dimensional Newton force law is recovered, but serendipitously, the corresponding Newton constant is shown to be necessarily lower than the one which governs Friedmann-Robertson-Walker cosmology. This has the potential to puzzle out cosmological dark matter. A subsequent conjecture concerning galactic dark matter follows. -
Inclusive constraints on unified dark matter models from future large-scale surveys
In the very last years, cosmological models where the properties of the dark components of the Universe — dark matter and dark energy — are accounted for by a single ''dark fluid'' have drawn increasing attention and interest. Amongst many proposals, Unified Dark Matter (UDM) cosmologies are promising candidates as effective theories. In these models, a scalar field with a non-canonical kinetic term in its Lagrangian mimics both the accelerated expansion of the Universe at late times and the clustering properties of the large-scale structure of the cosmos. However, UDM models also present peculiar behaviours, the most interesting one beingmore »