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SN 1987A Gamma-Ray Limits on the Conversion of Pseudoscalars | | J.W. Brockway
; E.D. Carlson
; G.G. Raffelt
; | | Date: |
31 May 1996 | | Journal: | Phys.Lett. B383 (1996) 439-443 | | Abstract: | Pseudoscalar particles $phi$ usually couple electromagnetically by an interaction of the form $frc14 g phi F {widetilde F}$, allowing them to convert to photons in the presence of magnetic fields. Notably, new low-mass pseudoscalars emitted from supernova (SN) 1987A would have been converted to $gamma$-rays in the intervening magnetic field of the galaxy. Therefore, measurements by the Solar Maximum Mission (SMM) Gamma-Ray Spectrometer (GRS) can limit the inverse coupling constant to $g^{-1}>1{ imes}10^{11},
m GeV$, assuming the pseudoscalar is massless. This is an improvement over other astrophysical limits of a factor of about 2.5. | | Source: | arXiv, astro-ph/9605197 | | Services: | Forum | Review | PDF | Favorites | |
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