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

Ferreira de Lima, Danilo and Petrov, Petar and Soper, Davison and Spannowsky, Michael (2017) 'Quark-gluon tagging with shower deconstruction : unearthing dark matter and Higgs couplings.', Physical review D., 95 (3). 034001.


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.

Item Type:Article
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Publisher statement:Reprinted with permission from the American Physical Society: Physical Review D 95, 034001 © (2017) 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.
Date accepted:05 August 2016
Date deposited:26 July 2017
Date of first online publication:01 February 2017
Date first made open access:26 July 2017

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