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Title: Limiting equivalence principle violation and long-range baryonic force from neutron-antineutron oscillation

Authors:
;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1326862
Grant/Contract Number:
de-sc0016013
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 94; Journal Issue: 5; Related Information: CHORUS Timestamp: 2016-09-26 18:11:30; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Babu, K. S., and Mohapatra, Rabindra N.. Limiting equivalence principle violation and long-range baryonic force from neutron-antineutron oscillation. United States: N. p., 2016. Web. doi:10.1103/PhysRevD.94.054034.
Babu, K. S., & Mohapatra, Rabindra N.. Limiting equivalence principle violation and long-range baryonic force from neutron-antineutron oscillation. United States. doi:10.1103/PhysRevD.94.054034.
Babu, K. S., and Mohapatra, Rabindra N.. 2016. "Limiting equivalence principle violation and long-range baryonic force from neutron-antineutron oscillation". United States. doi:10.1103/PhysRevD.94.054034.
@article{osti_1326862,
title = {Limiting equivalence principle violation and long-range baryonic force from neutron-antineutron oscillation},
author = {Babu, K. S. and Mohapatra, Rabindra N.},
abstractNote = {},
doi = {10.1103/PhysRevD.94.054034},
journal = {Physical Review D},
number = 5,
volume = 94,
place = {United States},
year = 2016,
month = 9
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevD.94.054034

Citation Metrics:
Cited by: 2works
Citation information provided by
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  • Cited by 5
  • Transformation of a neutron to an antineutron n→n~ has not yet been experimentally observed. In principle, it can occur with free neutrons in the vacuum or with neutrons bound inside the nuclei. In a nuclear medium the neutron and the antineutron have different potentials and for that reason n–n~ conversion in nuclei is heavily suppressed. This transformation can also be suppressed for free neutrons in the presence of an environmental vector field that distinguishes the neutron from the antineutron. We consider the case of a gauge field coupled to the $B-L$ charge of the particles ($B-L$ photon), and we showmore » that discovery of n–n~ oscillation in experiment will lead to few order of magnitudes stronger limits on its coupling constant than present limits from the tests of the equivalence principle. If n–n~ oscillation will be discovered via nuclear instability, but not in free neutron oscillations at a corresponding level, this would indicate the presence of such environmental fifth forces. In the latter case the $B-L$ potential can be measurable by varying the external magnetic field for achieving the resonance conditions for n–n~ conversion. As for neutron–mirror neutron oscillation, such potentials should have no effect once the fifth forces are associated to a common quantum number $(B - L) - (B' - L')$ shared by the ordinary and mirror particles.« less
  • We have reexamined the question of what limit may be placed on the free space neutron-antineutron oscillation time tau/sub nn/ from a measured limit T/sub 0/ on the annihilation lifetime T of a nucleus. Using several recent antinucleon-nucleus optical potentials consistent with both p-bar-atom and low energy scattering data, we obtain a limit tau/sub nn/>(1 +- 0.3) x 10/sup 8/ sec if T/sub 0/ = 2.4 x 10/sup 31/ yr. We consider the effect on our results of nuclear medium corrections such as a renormalization of the effective operator for n..-->..n-bar transitions or the presence of additional ..delta..B = 2more » decay modes which are absent in free space. It is argued that renormalization effects are not likely to exceed those characteristic of nuclear ..beta.. decay, and that if additional modes are present, the limit on tau/sub nn/ becomes even better.« less
  • It has been recently proposed that the matter-antimatter asymmetry of the universe may have its origin in 'post-sphaleron baryogenesis' (PSB). It is a TeV scale mechanism that is testable at the CERN LHC and other low energy experiments. In this paper, we present a theory of PSB within a quark-lepton unified scheme based on the gauge group SU(2){sub L}xSU(2){sub R}xSU(4){sub c} that allows a direct connection between the baryon asymmetry and neutrino mass matrix. The flavor changing neutral current constraints on the model allow successful baryogenesis only for an inverted mass hierarchy for neutrinos, which can be tested in themore » proposed long base line neutrino experiments. The model also predicts observable neutron-antineutron oscillation accessible to the next generation of experiments as well as TeV scale colored scalars within reach of the LHC.« less