Phys. Rev. Lett. 86, 4463–4466 (2001)Do Electroweak Precision Data and Higgs-Mass Constraints Rule Out a Scalar Bottom Quark with Mass of Order 5 GeV?Received 14 August 2000; revised 3 November 2000; published in the issue dated 14 May 2001 We study the implications of a scalar bottom quark, with a mass of O(5GeV), within the minimal supersymmetric standard model. Light sbottoms may naturally appear for large tanβ and, depending on the decay modes, may have escaped experimental detection. We show that a light sbottom cannot be ruled out by electroweak precision data and the bound on the lightest CP-even Higgs-boson mass. We infer that a light b̃ scenario requires a relatively light scalar top quark whose mass is typically about the top-quark mass. In this scenario the lightest Higgs boson decays predominantly into b̃ pairs and obeys the mass bound mh≲123GeV. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.86.4463
DOI:
10.1103/PhysRevLett.86.4463
PACS:
12.60.Jv, 12.15.Lk, 14.80.Cp
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