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Title: Updated global SMEFT fit to Higgs, diboson and electroweak data

Abstract

The ATLAS and CMS collaborations have recently released significant new data on Higgs and diboson production in LHC Run 2. Measurements of Higgs properties have improved in many channels, while kinematic information for h → γγ and h → ZZ can now be more accurately incorporated in fits using the STXS method, and W+W- diboson production at high pT gives new sensitivity to deviations from the Standard Model. We have performed an updated global fit to precision electroweak data, W+W- measurements at LEP, and Higgs and diboson data from Runs 1 and 2 of the LHC in the framework of the Standard Model Effective Field Theory (SMEFT), allowing all coefficients to vary across the combined dataset, and present the results in both the Warsaw and SILH operator bases. We exhibit the improvement in the constraints on operator coefficients provided by the LHC Run 2 data, and discuss the correlations between them. We also explore the constraints our fit results impose on several models of physics beyond the Standard Model, including models that contribute to the operator coefficients at the tree level and stops in the MSSM that contribute via loops.

Authors:
 [1];  [2];  [3];  [4]
+ Show Author Affiliations
  1. King's College London (United Kingdom); European Organization for Nuclear Research (CERN), Geneva (Switzerland); National Inst. of Chemical Physics & Biophysics, Tallinn (Estonia)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Univ. of Sussex, Brighton (United Kingdom)
  4. Univ. of Cambridge (United Kingdom)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1466605
Report Number(s):
BNL-207974-2018-JAAM
Journal ID: ISSN 1029-8479
Grant/Contract Number:  
SC0012704
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: 2018; Journal Issue: 6; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; standard model; diboson; LEP; Higgs; SMEFT; coefficients; LHC

Citation Formats

Ellis, John, Murphy, Christopher W., Sanz, Verónica, and You, Tevong. Updated global SMEFT fit to Higgs, diboson and electroweak data. United States: N. p., 2018. Web. doi:10.1007/JHEP06(2018)146.
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Ellis, John, Murphy, Christopher W., Sanz, Verónica, & You, Tevong. Updated global SMEFT fit to Higgs, diboson and electroweak data. United States. doi:10.1007/JHEP06(2018)146.
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Ellis, John, Murphy, Christopher W., Sanz, Verónica, and You, Tevong. Tue . "Updated global SMEFT fit to Higgs, diboson and electroweak data". United States. doi:10.1007/JHEP06(2018)146. https://www.osti.gov/servlets/purl/1466605.
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@article{osti_1466605,
title = {Updated global SMEFT fit to Higgs, diboson and electroweak data},
author = {Ellis, John and Murphy, Christopher W. and Sanz, Verónica and You, Tevong},
abstractNote = {The ATLAS and CMS collaborations have recently released significant new data on Higgs and diboson production in LHC Run 2. Measurements of Higgs properties have improved in many channels, while kinematic information for h → γγ and h → ZZ can now be more accurately incorporated in fits using the STXS method, and W+W- diboson production at high pT gives new sensitivity to deviations from the Standard Model. We have performed an updated global fit to precision electroweak data, W+W- measurements at LEP, and Higgs and diboson data from Runs 1 and 2 of the LHC in the framework of the Standard Model Effective Field Theory (SMEFT), allowing all coefficients to vary across the combined dataset, and present the results in both the Warsaw and SILH operator bases. We exhibit the improvement in the constraints on operator coefficients provided by the LHC Run 2 data, and discuss the correlations between them. We also explore the constraints our fit results impose on several models of physics beyond the Standard Model, including models that contribute to the operator coefficients at the tree level and stops in the MSSM that contribute via loops.},
doi = {10.1007/JHEP06(2018)146},
journal = {Journal of High Energy Physics (Online)},
number = 6,
volume = 2018,
place = {United States},
year = {2018},
month = {6}
}
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DOI:  10.1007/JHEP06(2018)146
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