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Jet activity as a probe of high-mass resonance production

Harland-Lang, LA; Khoze, VA; Ryskin, MG; Spannowsky, M; (2016) Jet activity as a probe of high-mass resonance production. EUROPEAN PHYSICAL JOURNAL C , 76 (623) 10.1140/epjc/s10052-016-4471-4. Green open access

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Abstract

We explore the method of using the measured jet activity associated with a high-mass resonance state to determine the corresponding production modes. To demonstrate the potential of the approach, we consider the case of a resonance of mass MRMR decaying to a diphoton final state. We perform a Monte Carlo study, considering three mass points MR=0.75,1.5,2.5MR=0.75,1.5,2.5 TeV, and show that the γγγγ , WW, gg and light and heavy qq¯¯qq¯ initiated cases lead to distinct predictions for the jet multiplicity distributions. As an example, we apply this result to the ATLAS search for resonances in diphoton events, using the 2015 data set of 3.2fb−13.2fb−1 at s√=13s=13 TeV. Taking the spin-0 selection, we demonstrate that a dominantly gg-initiated signal hypothesis is mildly disfavoured, while the γγγγ and light quark cases give good descriptions within the limited statistics, and a dominantly WW-initiated hypothesis is found to be in strong tension with the data. We also comment on the bb¯¯bb¯ initial state, which can already be constrained by the measured b-jet multiplicity. Finally, we present expected exclusion limits with integrated luminosity, and demonstrate that with just a few 10s of fb−1fb−1 we can expect to constrain the production modes of such a resonance.

Type: Article
Title: Jet activity as a probe of high-mass resonance production
Open access status: An open access version is available from UCL Discovery
DOI: 10.1140/epjc/s10052-016-4471-4
Publisher version: http://dx.doi.org/10.1140/epjc/s10052-016-4471-4
Additional information: © The Author(s) 2016. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Keywords: Science & Technology, Physical Sciences, Physics, Particles & Fields, Physics
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/1555564
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