Jet activity as a probe of diphoton resonance production

Harland-Lang, L.A.; Khoze, V.A.; Ryskin, M.G.; Spannowsky, M.

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 MR decaying to a diphoton final state. We perform a Monte Carlo study, considering three mass points MR = 0.75, 1.5, 2.5 TeV, and show that the γ γ , W W, gg and light and heavy 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 3.2 fb−1 at √s = 13 TeV. Taking the spin-0 selection, we demonstrate that a dominantly gg-initiated signal hypothesis is mildly disfavoured, while the γ γ and light quark cases give good descriptions within the limited statistics, and a dominantly W W-initiated hypothesis is found to be in strong tension with the data. We also comment on the 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−1 we can expect to constrain the production modes of such a resonance.

Citation

Harland-Lang, L., Khoze, V., Ryskin, M., & Spannowsky, M. (2016). Jet activity as a probe of diphoton resonance production. The European Physical Journal C, 76, Article 623. https://doi.org/10.1140/epjc/s10052-016-4471-4

• Journal Article Type: Article
• Acceptance Date: Oct 31, 2016
• Online Publication Date: Nov 16, 2016
• Publication Date: Nov 16, 2016
• Deposit Date: Nov 10, 2016
• Publicly Available Date: Oct 6, 2017
• Journal: European Physical Journal C: Particles and Fields
• Print ISSN: 1434-6044
• Electronic ISSN: 1434-6052
• Publisher: SpringerOpen
• Peer Reviewed: Peer Reviewed
• Volume: 76
• Article Number: 623
• DOI: https://doi.org/10.1140/epjc/s10052-016-4471-4