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Implications of an Improved Neutron-Antineutron Oscillation Search for Baryogenesis: A Minimal Effective Theory Analysis.

Authors :
Grojean C
Shakya B
Wells JD
Zhang Z
Source :
Physical review letters [Phys Rev Lett] 2018 Oct 26; Vol. 121 (17), pp. 171801.
Publication Year :
2018

Abstract

Future neutron-antineutron (n-n[over ¯]) oscillation experiments, such as at the European Spallation Source and the Deep Underground Neutrino Experiment, aim to find first evidence of baryon number violation. We investigate implications of an improved n-n[over ¯] oscillation search for baryogenesis via interactions of n-n[over ¯] mediators, parametrized by an effective field theory (EFT). We find that even in a minimal EFT setup there is overlap between the parameter space probed by n-n[over ¯] oscillation and the region that can realize the observed baryon asymmetry of the Universe. The mass scales of exotic new particles are in the tera-electron-volt-peta-electron-volt regime, inaccessible at the LHC or its envisioned upgrades. Given the innumerable high energy theories that can match, or resemble, the minimal EFT that we discuss, future n-n[over ¯] oscillation experiments could probe many viable theories of baryogenesis beyond the reach of other experiments.

Details

Language :
English
ISSN :
1079-7114
Volume :
121
Issue :
17
Database :
MEDLINE
Journal :
Physical review letters
Publication Type :
Academic Journal
Accession number :
30411946
Full Text :
https://doi.org/10.1103/PhysRevLett.121.171801