Photons, neutrinos, and the optical activity
Abstract
We compute the one-loop helicity amplitudes for low-energy νγ-->νγ scattering and its crossed channels in the standard model with massless neutrinos. In the center of mass, with s=2ω<<2me, the cross sections for these 2-->2 channels grow roughly as ω6. The scattered photons in the elastic channel are circularly polarized and the net value of the polarization is nonzero. We also present a discussion of the optical activity of a sea of neutrinos and estimate the values of its index of refraction and rotary power in the absence of dispersion.
- Publication:
-
Physical Review D
- Pub Date:
- December 2001
- DOI:
- 10.1103/PhysRevD.64.113007
- arXiv:
- arXiv:hep-ph/0107166
- Bibcode:
- 2001PhRvD..64k3007A
- Keywords:
-
- 13.15.+g;
- 14.60.Lm;
- 14.70.Bh;
- 95.30.Cq;
- Neutrino interactions;
- Ordinary neutrinos (nuW bosons;
- Photons;
- Elementary particle processes;
- High Energy Physics - Phenomenology
- E-Print:
- 9 pages, ReVTeX4, 6 figures included