A cosmological lower bound on the neutron electric dipole moment

Details A cosmological lower bound on the neutron electric dipole moment A cosmological lower bound on the neutron electric dipole moment

Feb 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981phlb...99..101e&link_type=abstract

Physics Letters B, Volume 99, Issue 2, p. 101-106.

Physics

32

Scientific paper

We argue that in a wide class of grand unified theories diagrams similar to those generating baryon number in the early universe also contribute to renormalization of the CP-violating θ parameter of QCD and hence to the neutron electric dipole moment dn. We then use the apparent baryon-to-photon ratio (nB/nγ) >~ 1.3 × 10-10 to deduce an order-of-magnitude lower bound on the neutron electric dipole moment: dn >~ 3 × 10-28 e cm. Conversely the present experimental upper limit on dn implies (nB/nγ) <~ 6 × 10-7. We find as a corollary that there is not much scope for entropy generation after the creation of the baryon-antibaryon asymmetry in the very early universe.

Affiliated with

Also associated with

No associations

Rating

A cosmological lower bound on the neutron electric dipole moment does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A cosmological lower bound on the neutron electric dipole moment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A cosmological lower bound on the neutron electric dipole moment will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1408719