2001/01/31 by Christophe Le Mouël, C. Le Mouel · 1 citation
Engineering · Physics and Astronomy · #Electromagnetic Scattering and Analysis #Particle Accelerators and Free-Electron Lasers #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1016/s0550-3213(01)00172-9
published as Nucl.Phys.B607:38-76,2001 · 41 pages, 7 eps figures, minor corrections, references added, to appear in Nucl. Phys. B
arxiv created 2001/05/22 · openalex publication_date 2001/07/01 · arxiv updated 2011/01/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29
In the MSSM, we make a careful tree-level study of Charge and Color Breaking conditions in the plane (H2, uL, uR), focusing on the top quark scalar case. A simple and fast procedure to compute the VEVs of the dangerous vacuum is presented and used to derive a model-independent optimal CCB bound on At. This bound takes into account all possible deviations of the CCB vacuum from the D-flat directions. For large tan β, it provides a CCB maximal mixing for the stop scalar fields t1,t2, which automatically rules out the Higgs maximal mixing |At|=√(6) m_t. As a result, strong limits on the stop mass spectrum and a reduction, in some cases substantial, of the one-loop upper bound on the CP-even lightest Higgs boson mass, mh, are obtained. To incorporate one-loop leading corrections, this tree-level CCB condition should be evaluated at an appropriate renormalization scale which proves to be the SUSY scale.