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SN 1987A gamma-ray limits on the conversion of pseudoscalars

Abstract Pseudoscalar particles θ usually couple electromagnetically by an interaction of the form 1 4 gθF F , allowing them to convert to photons in the presence of magnetic fields. Notably, new…
arXiv (opens in a new tab)

Twenty southern peculiar emission-line stars

Observational data for 20 southern stars having emission-line spectra that suggest a significant degree of mass ejection are given in order to present an atlas of their spectra and to give a…
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Black hole evolution by spectral methods

Current methods of evolving a spacetime containing one or more black holes are plagued by instabilities that prohibit long-term evolution. Some of these instabilities may be due to the numerical…
arXiv (opens in a new tab)

Two stage phase transition in two Higgs models

Abstract We present a mechanism in which models with two Higgs fields can undergo a two stage phase transition as the temperature falls. The first stage is a conventional second order (or weakly…
arXiv (opens in a new tab)

LIMITS ON A NEW U(1) COUPLING

Abstract The existence of a new U(1) gauge coupling is considered. The range and strength are not constrained. The coupling is constrained by the demand that the model be anomaly free and that the…
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Pseudoscalar conversion and X-rays from stars

We consider limits on photon couplings of the form gΦFF to a massless pseudoscalar Φ. Such pseudoscalars can be produced in stellar interiors and then reconverted into photons in the presence of the…
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Method to compute the stress-energy tensor for the massless spin 1 2 field in a general static spherically symmetric spacetime

A method for computing the stress-energy tensor for the quantized, massless, spin $\frac{1}{2}$ field in a general static spherically symmetric spacetime is presented. The field can be in a zero…
arXiv (opens in a new tab)

Semiclassical gravity in the far field limit of stars, black holes, and wormholes

P. R. A. would like to thank R. Wald and L. Ford for helpful comments. P. R. A., A. F., and S. F. would like to thank R. Balbinot for helpful discussions. The work of P. R. A. was supported in part…
arXiv (opens in a new tab)

Terrestrially enhanced neutrino oscillations.

The effect of Wolfenstein neutrino-oscillation enhancement on atmospheric neutrinos is considered and it is found that forelta..M-italic/sup 2/--10/Sup -3/-- 10/sup -4/ eV/ Sup 2/ and sin/Sup 2/(2theta)> oscillations might be detectable.
PubMed (opens in a new tab)

Photon to pseudoscalar conversion in the interstellar medium

Abstract We investigate the mixing of the photon with a massless pseudoscalar coupled to the electromagnetic field through a gφF F coupling in the presence of a background magnetic field. Proper…
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