3 papers
hep-ph2002
Frame Dependence of the Pair Contribution to the Pion Electromagnetic Form Factor in a Light-Front Approach
J. P. B. C. de Melo, T. Frederico, E. Pace +1
The frame dependence of the pair-term contribution to the electromagnetic form factor of the pion is studied within the Light Front approach. A symmetric ansatz for the pion Bethe-…
astro-ph2001
Studies of Hard X-ray Tails in Z sources with RXTE/HEXTE
F. D'Amico, W. A. Heindl, R. E. Rothschild +1
We report RXTE results of spectral analyses of three (Sco X-1, GX 349+2, and Cyg X-2) out of the 6 known Z sources, with emphasis in the hard X-ray emission. No hard X-ray tails we…
astro-ph2000
HEXTE Detections of Hard X-Ray Tails in Sco X-1
F. D'Amico, W. A. Heindl, R. E. Rothschild +1
We report the detection of a non-thermal hard X-ray component from Sco X-1 based upon the analysis of 20-220 keV spectra obtained with the HEXTE experiment on-board the RXTE satell…