Expectations for neutron-antineutron oscillation time from TeV scale baryogenesis

Journal Article · Thu May 23 00:00:00 EDT 2013 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4807359· OSTI ID:22118508

Babu, K. S. ^[1]; Bhupal Dev, P. S. ^[2]; Mohapatra, Rabindra N. ^[3]

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1. Department of Physics, Oklahoma State University, Stillwater, OK 74078 (United States)
2. Consortium for Fundamental Physics, School of Physics and Astronomy, University of Manchester, Manchester, M13 9PL (United Kingdom)
3. Maryland Center for Fundamental Physics and Department of Physics, University of Maryland, College Park, MD 20742 (United States)

A TeV scale extension of the standard model that incorporates the seesaw mechanism for neutrino masses along with quark-lepton unification is presented. It is shown that this model leads to the {Delta}B= 2 baryon number violating process of neutron-antineutron (n-bar n) oscillation. The model has all the ingredients to generate the observed baryon asymmetry of the universe using the B-violating decay of a scalar field involved in the seesaw mechanism. The B-violating decay arises from the exchange of color sextet scalars which have TeV scale masses. Baryogenesis occurs below the sphaleron decoupling temperature and has been termed post-sphaleron baryogenesis. Here we show that the constraints of TeV scale baryogenesis, when combined with the neutrino oscillation data and restrictions from flavor changing neutral currents mediated by the colored scalars imply an upper limit on the n-bar n oscillation time of 5 Multiplication-Sign 10{sup 10} sec. regardless of the quark-lepton unification scale. If this scale is relatively low, in the (200 - 250) TeV range, {tau}{sub n-bar} {sub n} is predicted to be less than 10{sup 10} sec., which is accessible to the next generation of proposed experiments.

• OSTI ID: 22118508
• Journal Information: AIP Conference Proceedings, Vol. 1534, Issue 1; Conference: CETUP 2012: Workshop on dark matter, unification and neutrino physics, Lead-Deadwood, SD (United States), 10 Jul - 1 Aug 2012; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTINEUTRONS
ASYMMETRY
B MESONS
BARYON NUMBER
COLOR MODEL
COSMOLOGY
DECOUPLING
FLAVOR MODEL
LIMITING VALUES
NEUTRAL CURRENTS
NEUTRINO OSCILLATION
NEUTRINOS
NEUTRON OSCILLATION
NEUTRON-ANTINEUTRON INTERACTIONS
PARTICLE DECAY
QUARKS
REST MASS
SCALAR FIELDS
STANDARD MODEL
TEV RANGE