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Measuring the signal strength in tt¯HwithH→bb¯

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

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Niccolo Moretti

Petar Petrov

Stefano Pozzorini


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.


Moretti, N., Petrov, P., Pozzorini, S., & Spannowsky, M. (2016). Measuring the signal strength in tt¯HwithH→bb¯. Physical Review D, 93(1), Article 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


Published Journal Article (1.5 Mb)

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.

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