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Title: 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 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, b$$\bar{b}$$, and lighter quark anti-quark pairs. Furthermore, simultaneous measurements of the width and the VBF ratio may be able to point towards the existence of hidden decays.

Authors:
 [1];  [2];  [2];  [3]
  1. Jozef Stefan Institute, Ljubljana (Slovenia); Univ. of Ljubljana, Ljubljana (Slovenia)
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  3. 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 1029-8479
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 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, b$\bar{b}$, and lighter quark anti-quark 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}
}

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Works referenced in this record:

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