2018/12/27 by A. J. Costa, A.J. Costa, Costa, A. J. +9
Computer Science · Engineering · Physics and Astronomy · #Distributed and Parallel Computing Systems #Particle physics theoretical and experimental studies #Superconducting Materials and Applications #hep-ph
paper · pdf · doi:10.48550/arxiv.1812.10700
5 pages, 5 figures
arxiv created 2018/12/27 · arxiv updated 2018/12/31
A feasibility study for an experimental analysis searching for ttH(H→ bb) production at the LHC and its high luminosity phase is presented in this note. Unlike search strategies currently being used in experimental collaborations, the present analysis exploits jet substructure techniques and focuses on the reconstruction of boosted Higgs bosons, to obtain sensitivity to the signal in a simple cut-based analysis. The tt + jets background may be constrained in the proposed analysis through a control region with very small signal contamination. Using this analysis strategy, the ttH(H→ bb) process could be observed at the LHC, in the semi-leptonic channel alone, with a significance of 5.41± 0.12 for L=300 fb-1. For the same integrated luminosity, in the High Luminosity LHC scenario with an upgraded detector, a significance of 6.13± 0.11 may be obtained. The top Yukawa coupling could be measured with a 35% uncertainty using L=300 fb-1 of LHC data and of 17% at the HL-LHC scenario with L=3000 fb-1. In the same luminosity scenarios, the signal strength is equally expected to have a 18% and 5% uncertainty, respectively. Finally, it was found that re-clustered jets may be used without loss of efficiency.