Updated global SMEFT fit to Higgs, diboson and electroweak data

By John Ellis, C. Murphy, Veronica Sanz, T. You. Journal of High Energy Physics, 2018

240 citations recorded by the source corpus.

A bstractThe 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 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.

Subfields: Computer Networks and Communications, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/4e75b3bd6ba91703dde225393f7710affef04509

How researchers see this paper

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In Computer Networks and Communications

1. B. Henning
2. John Ellis
3. L. Harland–Lang
4. Veronica Sanz
5. R. Frederix
6. N. Craig
7. M. Grazzini
8. Juan Rojo

In Nuclear and High Energy Physics

1. Cms Collaboration
2. Atlas Collaboration
3. Gudrun Heinrich
4. Fabio Maltoni
5. Valentin Hirschi
6. R. Frederix
7. M. Zaro
8. Ansgar Denner

Citations in the corpus

• Higgs Physics at the HL-LHC and HE-LHC (2019, methodology): “[749], where a cross indicates no (current) sensitivity.”
• The gauge-Higgs legacy of the LHC Run I (2016, methodology): “The corresponding analyses based on Run I data [21–39] and first analyses based on Run II data [40,41] prove that the LHC has successfully transitioned to a precision physics experiment.”