https://doi.org/10.1140/epjc/s10052-015-3427-4
Regular Article - Theoretical Physics
The Higgs-like boson spin from the center–edge asymmetry in the diphoton channel at the LHC
1
Department of Physics and Technology, University of Bergen, Postboks 7803, 5020, Bergen, Norway
2
The Abdus Salam ICTP Affiliated Centre, Technical University of Gomel, 246746, Gomel, Belarus
* e-mail: per.osland@ift.uib.no
Received:
5
February
2015
Accepted:
24
April
2015
Published online:
7
May
2015
We discuss the discrimination of the 125 GeV spin-parity 
Higgs-like boson observed at the LHC, decaying into two photons, 
, against the hypothesis of a minimally coupled 
narrow diphoton resonance with the same mass and giving the same total number of signal events under the peak. We apply, as the basic observable of the analysis, the center–edge asymmetry 
of the cosine of the polar angle of the produced photons in the diphoton rest frame to distinguish between the tested spin hypotheses. We show that the center–edge asymmetry should provide a strong discrimination between the possibilities of spin-0 and spin-2 with graviton-like couplings, depending on the fraction of 
production of the spin-2 signal, reaching 
for 
. Indeed, the has the potential to do better than existing analyses for 
.
© SIF and Springer-Verlag Berlin Heidelberg, 2015
