Heidelberg 2007 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 407: BSM Theorie II

T 407.8: Vortrag

Donnerstag, 8. März 2007, 18:30–18:45, KIP SR 2.402

The Passage of Ultrarelativistic Neutralinos through Matter — •Sascha Bornhauser and Manuel Drees — Physikalisches Institut, Universität Bonn, Nussallee 12, D53115 Bonn, Germany

The origin of the most energetic cosmic ray events, with $E \gsim 10^{20}$ eV, remains mysterious. One possibility is that they are produced in the decay of very massive, long--lived particles. It has been suggested that these so--called ``top--down scenarios'' can be tested by searching for ultrarelativistic neutralinos, which would be produced copiously if superparticles exist at or near the TeV scale.

The talk gives attention to the interactions of such neutralinos with ordinary matter. The transport equations for bino- and higgsino-like neutralinos traversing the earth were solved with the aid of a straightforward numerical method. The resulting spectra were checked for flux conservation. The event rates corresponding to these neutralino fluxes, which may be detected by future satellite-experiments, were also calculated.