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106 records were found.

Comment: 14 pages, 5 figures, To be published as chapter in *Perspectives on LHC Physics*, edited by G. Kane and A. Pierce, World Scientific Publishing Co., 2008
Comment: 71 pages, Delivered at Cambridge University and University of Liverpool, British Universities Summer School (BUSSTEPP 2008 & 2009)
Comment: Lectures to Philosophy of Physics students at the University of Michigan, 32 pages
A weakly interacting dark-matter particle may be difficult to discover at an accelerator because it either (1) is too massive, (2) has no standard-model gauge interactions, or (3) is almost degenerate with other states. In each of these cases, searches for annihilation products in the Galactic halo are useful probes of dark-matter properties. Using the example of supersymmetric dark matter, I discuss how astrophysical searches for dark matter may provide discovery and mass information inaccessible to collider physics programs such as the Tevatron and LHC.
Comment: 8 pages, 1 figure, to appear in the Proceedings of The 10th Intl. Conf. on Supersymmetry and Unification of Fundamental Interactions (SUSY-02), 17-23 June 2002, Hamburg, Germany. v2: proper formatting, minor clarifications
From a theoretical point of view it is not hard to imagine gaugino masses being much lighter than scalar masses. The dominant contributions to gaugino masses are then their anomaly-mediated values. Given current lower bounds on gauginos, which are near the W-mass scale, considering a little hierarchy between weak-scale gauginos and much heavier scalars requires suspending normal intuition on finetuning and naturalness of the Higgs potential. Nevertheless, tantalizing perks come from the hypothesis: lessened flavor and CP violation problems, more compatibility with gauge coupling unification and third generation Yukawa unification, suppressed dimension-five proton decay operators, and no problems satisfying the current Higgs mass constraint for any value of tan(beta) consistent with the top and bottom Yukawa couplings remaining finite...
Comment: 26 pages, Presented at Theoretical Advanced Study Institute (TASI 2004), Boulder, Colorado, 6 Jun - 2 Jul, 2004
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