Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-08-09
Phys.Rev.Lett.99:261601,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
4 pages, 2 figures; references added
Scientific paper
10.1103/PhysRevLett.99.261601
We propose new physical processes based on the axial vector anomaly and described by the Wess-Zumino-Witten term that couples the photon, Z-boson, and the omega-meson. The interaction takes the form of a pseudo-Chern-Simons term, $\sim \epsilon_{\mu\nu\rho\sigma}\omega^\mu Z^\nu F^{\rho\sigma}$. This term induces neutrino-photon interactions at finite baryon density via the coupling of the Z-boson to neutrinos. These interactions may be detectable in various laboratory and astrophysical arenas. The new interactions may account for the MiniBooNE excess. They also produce a competitive contribution to neutron star cooling at temperatures >10^9 K. These processes and related axion--photon interactions at finite baryon density appear to be relevant in many astrophysical regimes.
Harvey Jeffrey A.
Hill Christopher T.
Hill Richard J.
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