https://doi.org/10.1140/epjc/s10052-016-4471-4
Regular Article - Theoretical Physics
Jet activity as a probe of high-mass resonance production
1
Department of Physics and Astronomy, University College London, London, WC1E 6BT, UK
2
Institute for Particle Physics Phenomenology, Durham University, Durham, DH1 3LE, UK
3
Petersburg Nuclear Physics Institute, NRC Kurchatov Institute, Gatchina, St. Petersburg, 188300, Russia
* e-mail: l.harland-lang@ucl.ac.uk
Received:
22
July
2016
Accepted:
31
October
2016
Published online:
16
November
2016
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 
decaying to a diphoton final state. We perform a Monte Carlo study, considering three mass points 
TeV, and show that the 
, WW, gg and light and heavy 
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 
at 
TeV. Taking the spin-0 selection, we demonstrate that a dominantly gg-initiated signal hypothesis is mildly disfavoured, while the 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 
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 
we can expect to constrain the production modes of such a resonance.
© The Author(s), 2016
