Sbottom discovery via mixed decays at the LHC

Tao Han, Shufang Su, Yongcheng Wu, Bin Zhang, Huanian Zhang

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Abstract

In the search for the bottom squark (sbottom) in supersymmetry (SUSY) at the LHC, the common practice has been to assume a 100% decay branching fraction for a given search channel. In realistic minimal supersymmetric Standard Model scenarios, there are often more than one significant decay modes to be present, which significantly weaken the current sbottom search limits at the LHC. On the other hand, the combination of the multiple decay modes offers alternative discovery channels for sbottom searches. In this paper, we present the sbottom decays in a few representative mass parameter scenarios. We then analyze the sbottom signal for the pair production in QCD with one sbottom decaying via b→bχ10, bχ20, and the other one decaying via b→tχ1±. With the gaugino subsequent decaying to gauge bosons or a Higgs boson χ20→Zχ10, hχ10 and χ1±→W±χ10, we study the reach of those signals at the 14 TeV LHC with 300 fb-1 integrated luminosity. For a left-handed bottom squark, we find that a mass up to 920 GeV can be discovered at 5σ significance for 250 GeV0); similarly, it can be discovered up to 840 GeV, or excluded up to 900 GeV at the 95% confidence level for the Z channel (μ

Original languageEnglish (US)
Article number115009
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume92
Issue number11
DOIs
Publication statusPublished - Dec 14 2015

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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