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

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

Journal Article · Wed Feb 01 00:00:00 EST 2017 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.95.034001· OSTI ID:1601464

Ferreira de Lima, Danilo ^[1]; Petrov, Petar ^[2]; Soper, Davison ^[3]; Spannowsky, Michael ^[2]

Ruprechts-Karls-Univ. Heidelberg, Heidelberg (Germany). Physikalisches Inst.
Durham Univ. (United Kingdom). Inst. for Particle Physics Phenomenology
Univ. of Oregon, Eugene, OR (United States)

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.

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Research Organization:: Univ. of Oregon, Eugene, OR (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP); European Commission (EC); Alexander von Humboldt Foundation

Grant/Contract Number:: SC0011640

OSTI ID:: 1601464

Alternate ID(s):: OSTI ID: 1342448

Journal Information:: Physical Review D, Vol. 95, Issue 3; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 32 works

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