Comments on the diphoton excess: Critical reappraisal of effective field theory interpretations
Abstract
We consider the diphoton excess observed by ATLAS and CMS using the most uptodate 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 spin0 and spin2 Standard Model (SM) gaugesinglet resonances, two of the three processes S → ZZ, S → Z_{γ}, and S → W W must occur with a nonzero 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 vectorboson fusion (VBF) cuts. We find that for a given VBF to inclusive production ratio there is maximum rate of S to gauge bosons, b$$\bar{b}$$, and lighter quark antiquark pairs. Furthermore, simultaneous measurements of the width and the VBF ratio may be able to point towards the existence of hidden decays.
 Authors:

 Jozef Stefan Institute, Ljubljana (Slovenia); Univ. of Ljubljana, Ljubljana (Slovenia)
 Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
 Univ. of Cincinnati, Cincinnati, OH (United States)
 Publication Date:
 Research Org.:
 Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
 Sponsoring Org.:
 USDOE Office of Science (SC)
 OSTI Identifier:
 1367509
 Grant/Contract Number:
 SC0012567
 Resource Type:
 Accepted Manuscript
 Journal Name:
 Journal of High Energy Physics (Online)
 Additional Journal Information:
 Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2016; Journal Issue: 7; Journal ID: ISSN 10298479
 Publisher:
 Springer Berlin
 Country of Publication:
 United States
 Language:
 English
 Subject:
 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; beyond standard model; effective field theories
Citation Formats
Kamenik, Jernej F., Safdi, Benjamin R., Soreq, Yotam, and Zupan, Jure. Comments on the diphoton excess: Critical reappraisal of effective field theory interpretations. United States: N. p., 2016.
Web. doi:10.1007/JHEP07(2016)042.
Kamenik, Jernej F., Safdi, Benjamin R., Soreq, Yotam, & Zupan, Jure. Comments on the diphoton excess: Critical reappraisal of effective field theory interpretations. United States. doi:10.1007/JHEP07(2016)042.
Kamenik, Jernej F., Safdi, Benjamin R., Soreq, Yotam, and Zupan, Jure. Fri .
"Comments on the diphoton excess: Critical reappraisal of effective field theory interpretations". United States. doi:10.1007/JHEP07(2016)042. https://www.osti.gov/servlets/purl/1367509.
@article{osti_1367509,
title = {Comments on the diphoton excess: Critical reappraisal of effective field theory interpretations},
author = {Kamenik, Jernej F. and Safdi, Benjamin R. and Soreq, Yotam and Zupan, Jure},
abstractNote = {We consider the diphoton excess observed by ATLAS and CMS using the most uptodate 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 spin0 and spin2 Standard Model (SM) gaugesinglet resonances, two of the three processes S → ZZ, S → Zγ, and S → W W must occur with a nonzero 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 vectorboson fusion (VBF) cuts. We find that for a given VBF to inclusive production ratio there is maximum rate of S to gauge bosons, b$\bar{b}$, and lighter quark antiquark pairs. Furthermore, simultaneous measurements of the width and the VBF ratio may be able to point towards the existence of hidden decays.},
doi = {10.1007/JHEP07(2016)042},
journal = {Journal of High Energy Physics (Online)},
number = 7,
volume = 2016,
place = {United States},
year = {2016},
month = {7}
}
Web of Science
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