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Title: The importance of flavor in SMEFT Electroweak Precision Fits

Abstract

Effective field theory tools are essential for exploring non-Standard Model physics at the LHC in the absence of the discovery of new light particles. Predictions for observables are typically made at the lowest order in the QCD and electroweak expansions in the Standard Model effective field theory (SMEFT) and often ignore the effects of flavor. Here, we present results for electroweak precision observables (EWPOs) at the next-to-leading order QCD and electroweak expansions (NLO) of the SMEFT with an arbitrary flavor structure for the fermion operators. Numerical NLO SMEFT fits to EWPOs have a strong dependence on the assumed flavor structures and we demonstrate this using various popular assumptions for flavor symmetries.

Authors:
 [1];  [2]; ORCiD logo [1]
+ Show Author Affiliations
  1. Universidade de Santiago de Compostela (Spain)
  2. Brookhaven National Laboratory (BNL), Upton, NY (United States). Dept. of Physics
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
OSTI Identifier:
1975236
Report Number(s):
BNL-224440-2023-JAAM
Journal ID: ISSN 1029-8479; TRN: US2314049
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: 2023; Journal Issue: 5; Journal ID: ISSN 1029-8479
Publisher:
Springer Nature
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; electroweak precision physics; higher order electroweak calculations; SMEFT

Citation Formats

Bellafronte, Luigi, Dawson, Sally, and Giardino, Pier Paolo. The importance of flavor in SMEFT Electroweak Precision Fits. United States: N. p., 2023. Web. doi:10.1007/jhep05(2023)208.
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Bellafronte, Luigi, Dawson, Sally, & Giardino, Pier Paolo. The importance of flavor in SMEFT Electroweak Precision Fits. United States. https://doi.org/10.1007/jhep05(2023)208
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Bellafronte, Luigi, Dawson, Sally, and Giardino, Pier Paolo. Thu . "The importance of flavor in SMEFT Electroweak Precision Fits". United States. https://doi.org/10.1007/jhep05(2023)208. https://www.osti.gov/servlets/purl/1975236.
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@article{osti_1975236,
title = {The importance of flavor in SMEFT Electroweak Precision Fits},
author = {Bellafronte, Luigi and Dawson, Sally and Giardino, Pier Paolo},
abstractNote = {Effective field theory tools are essential for exploring non-Standard Model physics at the LHC in the absence of the discovery of new light particles. Predictions for observables are typically made at the lowest order in the QCD and electroweak expansions in the Standard Model effective field theory (SMEFT) and often ignore the effects of flavor. Here, we present results for electroweak precision observables (EWPOs) at the next-to-leading order QCD and electroweak expansions (NLO) of the SMEFT with an arbitrary flavor structure for the fermion operators. Numerical NLO SMEFT fits to EWPOs have a strong dependence on the assumed flavor structures and we demonstrate this using various popular assumptions for flavor symmetries.},
doi = {10.1007/jhep05(2023)208},
journal = {Journal of High Energy Physics (Online)},
number = 5,
volume = 2023,
place = {United States},
year = {Thu May 25 00:00:00 EDT 2023},
month = {Thu May 25 00:00:00 EDT 2023}
}
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https://doi.org/10.1007/jhep05(2023)208
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