CERN Accelerating science

Preprint
Report number	arXiv:1604.06948 ; CERN-TH-2016-091 ; CERN-TH-2016-091
Title	Telling the spin of the di-photon resonance
Author(s)	Fabbrichesi, Marco (INFN, Trieste) ; Pinamonti, Michele (INFN, Trieste ; SISSA, Trieste) ; Urbano, Alfredo (CERN)
Publication	2016
Imprint	23 Apr 2016
Number of pages	21
Note	Comments: 21 pages, 21 figures 21 pages, 21 figures
Subject category	Particle Physics - Phenomenology
Abstract	We argue that the spin of the 750 GeV resonance can be determined at the 99.7% confidence level in the di-photon channel with as few as 10 fb$^{-1}$ of luminosity. This result is true if the resonance is produced by gluon fusion (independently of the selection cuts) while an appropriate choice of selection cuts is needed if quark production is sub-dominantly present--which is the case of the Kaluza-Klein gravitational excitation under the hypothesis of a spin-2 resonance. A proportionally larger luminosity is required if the model for the spin-2 resonance includes a dominant production by quarks or in the absence of an efficient separation of the signal from the background.
Other source	Inspire
Copyright/License	arXiv nonexclusive-distrib. 1.0 Preprint: © 2016-2024 CERN (License: CC-BY-4.0)