Quark-gluon tagging with shower deconstruction: Unearthing dark matter and Higgs couplings

Ferreira de Lima, Danilo; Petrov, Petar; Soper, Davison; Spannowsky, Michael

doi:10.1103/physrevd.95.034001

Quark-gluon tagging with shower deconstruction: Unearthing dark matter and Higgs couplings

Ferreira de Lima, Danilo; Petrov, Petar; Soper, Davison; Spannowsky, Michael

Authors

Danilo Ferreira de Lima

Petar Petrov

Davison Soper

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

Abstract

The separation of quark and gluon initiated jets can be an important way to improve the sensitivity in searches for new physics or in measurements of Higgs boson properties. We present a simplified version of the shower deconstruction approach as a novel observable for quark-gluon tagging. Assuming topoclusterlike objects as input, we compare our observable with energy correlation functions and find a favorable performance for a large variety of jet definitions. We address the issue of infrared sensitivity of quark-gluon discrimination. When this approach is applied to dark matter searches in monojet final states, limitations from small signal-to-background ratios can be overcome. We also show that quark-gluon tagging is an alternative way of separating weak boson from gluon-fusion production in the process p + p → H + jet + jet + X.

Citation

Ferreira de Lima, D., Petrov, P., Soper, D., & Spannowsky, M. (2017). Quark-gluon tagging with shower deconstruction: Unearthing dark matter and Higgs couplings. Physical Review D, 95(3), Article 034001. https://doi.org/10.1103/physrevd.95.034001

Journal Article Type	Article
Acceptance Date	Aug 5, 2016
Online Publication Date	Feb 1, 2017
Publication Date	Feb 1, 2017
Deposit Date	Jul 26, 2017
Publicly Available Date	Jul 26, 2017
Journal	Physical Review D
Print ISSN	2470-0010
Electronic ISSN	2470-0029
Publisher	American Physical Society
Peer Reviewed	Peer Reviewed
Volume	95
Issue	3
Article Number	034001
DOI	https://doi.org/10.1103/physrevd.95.034001

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