Bounds on the coupling of light pseudoscalars to nucleons from optical laser experiments
Abstract
We find the following improved laboratory bounds on the coupling of light pseudoscalars to protons and neutrons: g2p/4π<1.7×10-9 and g2n/4π<6.8×10-8. The limit on gp arises since a nonzero gp would induce a coupling of the pseudoscalar to two photons, which is limited by experiments studying laser beam propagation in magnetic fields. Combining our bound on gp with a recent analysis of Fischbach and Krause on two-pseudoscalar exchange potentials and experiments testing the equivalence principle, we obtain our limit on gn.
- Publication:
-
Physical Review D
- Pub Date:
- December 1999
- DOI:
- 10.1103/PhysRevD.61.011701
- arXiv:
- arXiv:hep-ph/9910380
- Bibcode:
- 1999PhRvD..61a1701M
- Keywords:
-
- 14.20.Dh;
- 04.90.+e;
- 12.20.Fv;
- 14.80.-j;
- Protons and neutrons;
- Other topics in general relativity and gravitation;
- Experimental tests;
- Other particles;
- High Energy Physics - Phenomenology
- E-Print:
- 5 pages, 1 figure, to be published in Phys. Rev. D., corrected some typos