Comments on the diphoton excess: critical reappraisal of effective field theory interpretations
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13130_2016_Article_4299.pdf
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Author(s)
Kamenik, Jernej F.
Safdi, Benjamin Ryan
Soreq, Yotam
Zupan, Jure
Date Issued
July 2016
Journal
Journal of High Energy Physics
Publisher
Springer Berlin Heidelberg
Citation
Kamenik, Jernej F., Benjamin R. Safdi, Yotam Soreq, and Jure Zupan. "Comments on the diphoton excess: critical reappraisal of effective field theory interpretations." Journal of High Energy Physics 2016:42 (July 2016)
Version
Final published version
Abstract
We consider the diphoton excess observed by ATLAS and CMS using the most up-to-date data and estimate the preferred enhancement in the production rate between 8 TeV and 13 TeV. Within the framework of effective field theory (EFT), we then show that for both spin-0 and spin-2 Standard Model (SM) gauge-singlet resonances, two of the three processes S --> ZZ, S --> Zγ, and S --> W W must occur with a non-zero rate. Moreover, we demonstrate that these branching ratios are highly correlated in the EFT. Couplings of S to additional SM states may be constrained and differentiated by comparing the S production rates with and without the vector-boson fusion (VBF) cuts. We find that for a given VBF to inclusive production ratio there is maximum rate of S to gauge bosons, bb[overbar], and lighter quark anti-quark pairs. Simultaneous measurements of the width and the VBF ratio may be able to point towards the existence of hidden decays.
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1007/JHEP07(2016)042
