Jet-associated resonance spectroscopy

Englert, Christoph (SUPA, School of Physics and Astronomy, University of Glasgow, 0000 0001 2193 314X, G12 8QQ, Glasgow, UK) ; Ferretti, Gabriele (Department of Physics, Chalmers University of Technology, 0000 0001 0775 6028, Fysikgården, 41296, Göteborg, Sweden) ; Spannowsky, Michael (Department of Physics, Institute for Particle Physics Phenomenology, Durham University, 0000 0000 8700 0572, DH1 3LE, Durham, UK)

07 December 2017

Abstract: We present a model-independent study aimed at characterising the nature of possible resonances in the jet-photon or jet- Z final state at hadron colliders. Such resonances are expected in many models of compositeness and would be a clear indication of new physics. At leading order, in the narrow width approximation, the matrix elements are parameterised by just a few constants describing the coupling of the various helicities to the resonance. We present the full structure of such amplitudes up to spin 2 and use them to simulate relevant kinematic distributions that could serve to constrain the coupling structure. This also generalises the signal generation strategy that is currently pursued by ATLAS and CMS to the most general case in the considered channels. While the determination of the P/CP properties of the interaction seems to be out of reach within this framework, there is a wealth of information to be gained about the spin of the resonance and the relative couplings of the helicities.

Published in: EPJC 77 (2017) 842
Published by: Springer/Società Italiana di Fisica
DOI: 10.1140/epjc/s10052-017-5416-2
License: CC-BY-3.0

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