On the treatment of threshold effects in SUSY spectrum computations

Details On the treatment of threshold effects in SUSY spectrum computations On the treatment of threshold effects in SUSY spectrum computations

2005-11-10

arxiv.org/abs/hep-ph/0511123v1

Phys.Rev. D73 (2006) 015010

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 1 figure

Scientific paper

10.1103/PhysRevD.73.015010

We take a critical view of the treatment of threshold effects in SUSY spectrum computations from high-scale input. We discuss the two principal methods of (a) renormalization at a common SUSY scale versus (b) integrating out sparticles at their own mass scales. We point out problems in the implementations in public spectrum codes, together with suggestions for improvements. In concrete examples, we compare results of Isajet7.72 and Spheno2.2.3, and present the improvements done in Isajet7.73. We also comment on theoretical uncertainties. Last but not least, we outline how a consistent multiscale approach may be achieved.

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