Measuring the signal strength in tt¯HwithH→bb¯

Moretti, Niccolo; Petrov, Petar; Pozzorini, Stefano; Spannowsky, Michael

Abstract

A precise measurement of the Higgs boson couplings to bottom and top quarks is of paramount importance during the upcoming LHC runs. We present a comprehensive analysis for the Higgs production process in association with a semileptonically decaying top-quark pair and subsequent Higgs boson decay into bottom quarks. Due to the highly complex final state and large Standard Model backgrounds, measuring the signal strength in this process is known to be challenging. To maximize the sensitivity, we analyze different, statistically independent, phase space regions, where one or more of the heavy resonances are boosted. This allows us to employ jet substructure techniques, which help to reduce large t¯t þ X backgrounds. We find that combining several t¯tHðbb¯Þ phase space regions will allow one to measure deviations of the Standard Model signal strength of order 20% with 3 ab−1.

Citation

Moretti, N., Petrov, P., Pozzorini, S., & Spannowsky, M. (2016). Measuring the signal strength in tt¯HwithH→bb¯. Physical Review D, 93(1), Article 014019. https://doi.org/10.1103/physrevd.93.014019

• Journal Article Type: Article
• Acceptance Date: Nov 8, 2015
• Online Publication Date: Jan 21, 2016
• Publication Date: Jan 21, 2016
• Deposit Date: Nov 10, 2016
• Publicly Available Date: Jan 26, 2017
• Journal: Physical Review D
• Print ISSN: 2470-0010
• Electronic ISSN: 2470-0029
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 93
• Issue: 1
• Article Number: 014019
• DOI: https://doi.org/10.1103/physrevd.93.014019
• Public URL: https://durham-repository.worktribe.com/output/1401057