About the fine-tuning price of LEP

Details About the fine-tuning price of LEP About the fine-tuning price of LEP

1998-01-20

arxiv.org/abs/hep-ph/9801353v1

Phys.Lett.B433:63-66,1998

Physics

High Energy Physics

High Energy Physics - Phenomenology

3 pages, 3 figures

Scientific paper

10.1016/S0370-2693(98)00577-2

Following Chankowski, Ellis and Pokorski we quantify the amount of fine-tuning of input parameters of the Minimal Supersymmetric Standard Model that is needed to respect the lower limits on sparticle and Higgs masses imposed by negative searches so far, direct or indirect. By including the one loop radiative corrections to the effective potential, the amount of fine-tuning is reduced with respect to the results of CEP by a factor of 2--5, strongly increasing as tan\beta approaches 1. A further reduction factor may come from a more appropriate, less restrictive, definition of the fine-tuning parameter itself.

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