https://doi.org/10.1140/epjc/s10052-017-4594-2
Regular Article - Theoretical Physics
Implications of perturbative unitarity for scalar di-boson resonance searches at LHC
1
Dipartimento di Fisica, Università di Genova and INFN, Sezione di Genova, via Dodecaneso 33, 16159, Genova, Italy
2
Institute for Particle Physics Phenomenology, Department of Physics, Durham University, Durham, DH1 3LE, UK
3
Jožef Stefan Institute, Jamova 39, 1000, Ljubljana, Slovenia
4
Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 19, 1000, Ljubljana, Slovenia
5
DAMTP, University of Cambridge, Wilberforce Road, Cambridge, CB3 0WA, UK
6
Theoretical Physics Department, CERN, Geneva, Switzerland
* e-mail: marco.nardecchia@cern.ch
Received:
14
July
2016
Accepted:
1
January
2017
Published online:
16
January
2017
We study the constraints implied by partial wave unitarity on new physics in the form of spin-zero di-boson resonances at LHC. We derive the scale where the effective description in terms of the SM supplemented by a single resonance is expected to break down depending on the resonance mass and signal cross section. Likewise, we use unitarity arguments in order to set perturbativity bounds on renormalizable UV completions of the effective description. We finally discuss under which conditions scalar di-boson resonance signals can be accommodated within weakly coupled models.
© The Author(s), 2017
