Natural Supersymmetry and b -> s gamma constraints

Abstract

We investigate constraints from the observed branching ratio for b -> s gamma and fine-tuning in the framework of natural supersymmetry. The natural supersymmetry requires the large trilinear coupling of the stop sector, light higgsinos (a small mu parameter) and light stops, in order to reduce the fine-tuning in the Higgs sector while avoiding the LEP constraint. It is found that in such a scenario 5% (10%) level of fine-tuning is inevitable due to the b -> s gamma constraint even if the messenger scale is as low as 10^5 GeV (10^4 GeV), provided that the gaugino masses satisfy the GUT relation.

13 pages, 4 figures; version to be published in PLB

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• Natural SUSY Endures
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• Naturalness, b to s gamma, and SUSY Heavy Higgses
• Measurements of isospin asymmetry and difference of direct $CP$ asymmetries in inclusive $B\to X_s\gamma$ decays
• Measurement of Time-dependent $CP$ Asymmetries in $B^0\to K_S^0\eta \gamma$ Decays
• Tagging a mono-top signature in Natural SUSY
• Dark Matter at the Pseudoscalar Higgs Resonance in the pMSSM and SUSY GUTs
• Mono-top Signature from Supersymmetric $t\bar{t}H$ Channel
• Non-Perturbative Constraints on Light Sparticles from Properties of the RG Flow
• Mono-top Signature from Fermionic Top-partner
• Heavy gravitino, naturalness, and sizable anomaly mediation
• Correlated Electric and Magnetic Dipole Moment in Natural Supersymmetry