2012/07/31 by Natascia Vignaroli
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle Detector Development and Performance #Particle physics theoretical and experimental studies #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevd.86.075017
published as Phys. Rev. D 86, 075017 (2012) · 9 pp. Minor changes. Version to appear in PRD. arXiv admin note: substantial text overlap with arXiv:1204.0468
arxiv created 2012/09/20 · openalex publication_date 2012/10/12 · arxiv updated 2012/10/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Top partners from a new strong sector can be discovered soon, at the 8 TeV LHC, by analyzing their single production, which exhibits a large enhancement in the cross section compared to the analogous productions of bottom partners and exotic quarks. We analyze the subsequent decay of the top partners into a 125 GeV Higgs. This channel proves to be very promising for both the discovery of top partners and a test of the Higgs sector. For a reference value \ensuremathλ_\stackrel\texttildelowT=3 of the Higgs coupling to the top partner, we could have a discovery (observation) at the 8 TeV LHC, with 30 fb^\ensuremath-1, for top partner masses up to 760 (890) GeV. If the LHC and Tevatron excesses near 125 GeV are really due to a composite Higgs, naturalness arguments demand top partners below \ensuremath∼1 TeV. Our results highlight thus that the 8 TeV LHC already has a large sensitivity on probing the composite Higgs hypothesis. The LHC reach is even wider at √(s)=14 TeV. With \ensuremathλ_\stackrel\texttildelowT=3 the LHC with 100 fb^\ensuremath-1 can observe (at 5\ensuremathσ) a Higgs from a top partner decay for masses of this latter up to \ensuremath≃1450 GeV. In the case that the top partner is as light as \ensuremath≃500 GeV, the 14 TeV LHC would be sensitive to the measure of the \ensuremathλ_\stackrel\texttildelowT coupling in basically the full range \ensuremathλ_\stackrel\texttildelowT>1 predicted by the theory.