Ellis2018_Article_UpdatedGlobalSMEFTFitToHiggsDi.pdf (1.28 MB)
Updated global SMEFT fit to Higgs, diboson and electroweak data
Version 2 2023-06-12, 08:54
Version 1 2023-06-09, 16:11
journal contribution
posted on 2023-06-12, 08:54 authored by John Ellis, Christopher W Murphy, Veronica Sanz, Tevong YouThe 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??? and h?ZZ can now be more accurately incorporated in fits using the STXS method, and W + W - diboson production at high p T 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.
Funding
STFC Grant; ST/P000258/1
United States Department of Energy under Grant Contract
Junior Research Fellowship from Gonville
South-Eastern Particle Theory Alliance Sussex - RHUL - UCL 2017-2020 - Sussex node; G2074; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/P000819/1
Estonian Research Council via a Mobilitas Pluss grant
STFC consolidated grant; ST/P000681/1
History
Publication status
- Published
File Version
- Published version
Journal
Journal of High Energy PhysicsISSN
1029-8479Publisher
Springer VerlagExternal DOI
Issue
146Volume
2018Page range
1-41Department affiliated with
- Physics and Astronomy Publications
Research groups affiliated with
- Theoretical Particle Physics Research Group Publications
Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2018-12-18First Open Access (FOA) Date
2018-12-18First Compliant Deposit (FCD) Date
2018-12-14Usage metrics
Categories
No categories selectedKeywords
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC