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SUSY dark matter and non-universal gaugino masses

Description: In this talk the authors investigate the dark matter prospects for supersymmetric models with non-universal gaugino masses. They motivate the use of non-universal gaugino masses from several directions, including problems, with the current favorite scenario, the cMSSM. They then display new corridors of parameter space that allow an acceptable dark matter relic density once gaugino mass universality is relaxed. They finish with a specific string-derived model that allows this universality relax… more
Date: April 15, 2002
Creator: Birkedal-Hansen, Andreas
Partner: UNT Libraries Government Documents Department
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X-ray Spectropolarimetry of high temperature and high density plasma supported by LLNL Electron Beam Ion Trap Experiments

Description: Plasma polarization spectroscopy work done by our group since the 3rd US-Japan PPS Workshop is overviewed. Theoretically, the polarization dependence on various electron distribution functions for He-like, Ne-like, and Ni-like x-ray transitions for a wide range of Z has been investigated. In particular, this study was focused on the polarization dependence for monoenergetic and steep electron distribution functions. The diagnostically important spectral lines and features of K-, L-, and M-shell… more
Date: March 15, 2004
Creator: Shlyaptseva, A S; Kantsyrev, V L; Ouart, N D; Fedin, D A; Neill, P; Harris, C et al.
Partner: UNT Libraries Government Documents Department
open access

Measurement of 2l-nl' X-ray Transitions from Kr Clusters Irradiated by Femtosecond Laser Pulses

Description: X-ray line emission from 2{ell} - n{ell}{prime} transitions in Ne-like Kr and nearby ions has been observed from {approx} 1 {micro}m Kr clusters irradiated by fs-scale laser pulses at the JAERI facility in Kyoto, Japan. The incident laser intensity reached 10{sup 19} W/cm{sup 2}, with pulse energies from 50 to 300 mJ and pulse durations from 30 to 500 fs. The dependence of the x-ray spectral features and intensity on the incident laser intensity is rather weak, indicating that the 1 - 2 ps clus… more
Date: June 15, 2004
Creator: Hansen, S B; Fournier, K B; Faenov, A Y; Magunov, A I; Pikuz, T A; Skobelev, I Y et al.
Partner: UNT Libraries Government Documents Department
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