Proposals for Bottom Quark/Squark Renormalization in the Complex MSSM

Details Proposals for Bottom Quark/Squark Renormalization in the Complex MSSM Proposals for Bottom Quark/Squark Renormalization in the Complex MSSM

2010-07-05

arxiv.org/abs/1007.0689v1

Phys.Rev.D82:075010,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

47 pages, 12 figures

Scientific paper

10.1103/PhysRevD.82.075010

We present a consistent renormalization of the top and bottom quark/squark sector of the MSSM with complex parameters (cMSSM). Various renormalization schemes are defined, analyzed analytically and tested numerically in the decays Stop_2 -> Sbot_i H+/W+ (i = 1,2). No scheme is found that produces numerically acceptable results over all the cMSSM parameter space, where problems occur mostly already for real parameters. Two schemes are identified that show the most robust behavior. A numerical analysis of the four partial stop decay widths is performed in our "preferred" scheme, "m_b, A_b DRbar". The full one-loop corrections to the corresponding partial decay widths are evaluated including hard QED and QCD radiation. We find mostly modest corrections at the one-loop level.

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