Constraint on the mass scale of a left-right-symmetric electroweak theory from the KL-KS mass difference

The KL-KS mass difference provides a stringent constraint on the mass (MR) of the charged right-handed gauge field occurring in a "manifest" left-right-symmetric electroweak theory, yielding MR1.6 TeV. Taken in the context of a grand-unifying gauge theory, e.g., O(10), such a large bound on MR, along with the measured value of sin2θW, implies that MR109 GeV. © 1982 The American Physical Society

Detection of high energy X-rays from the galactic center region

Observations of the galactic center region made with the high energy X-ray detector on OSO-8 are discussed. A strong hard X-ray which was detected during these observations from the vicinity of the galactic center are examined. The counting rate spectrum and the photon number spectrum of the flux are determined. Comparisons with the high energy X-ray fluxes observed from sources in the region by others are discussed