Do Electroweak Precision Data and Higgs-Mass Constraints Rule Out a Scalar Bottom Quark with Mass of Order 5 GeV? | Zendy

Marcela Carena | Zendy; S. Heinemeyer | Zendy; Carlos E. M. Wagner | Zendy; G. Weiglein | Zendy

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Do Electroweak Precision Data and Higgs-Mass Constraints Rule Out a Scalar Bottom Quark with Mass of Order 5 GeV?

Author(s) -

Marcela Carena,

S. Heinemeyer,

Carlos E. M. Wagner,

G. Weiglein

Publication year - 2001

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.86.4463

Subject(s) - physics , particle physics , top quark , higgs boson , electroweak interaction , scalar (mathematics) , top quark condensate , bottom quark , standard model (mathematical formulation) , order (exchange) , quark , boson , technicolor , nuclear physics , gauge boson , gauge theory , finance , economics , geometry , mathematics , archaeology , gauge (firearms) , history

We study the implications of a scalar bottom quark, with a mass of O (5 GeV), within the minimal supersymmetric standard model. Light sbottoms may naturally appear for large tan(beta) 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 b 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 b pairs and obeys the mass bound m(h) less, similar 123 GeV.

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