Measuring the signal strength in tt¯HwithH→bb¯

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

doi:10.1103/physrevd.93.014019

Measuring the signal strength in tt¯HwithH→bb¯

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

Authors

Niccolo Moretti

Petar Petrov

Stefano Pozzorini

Professor Michael Spannowsky michael.spannowsky@durham.ac.uk
Director

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

Files

Published Journal Article (1.5 Mb)
PDF

Copyright Statement
Reprinted with permission from the American Physical Society: Physical Review D 93, 014019 © (2016) by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.