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Author
Breso-Pla, V.
;
Falkowski, A.
;
Gonzalez-Alonso, M.
Title
A(FB) in the SMEFT: precision Z physics at the LHC
Type
Journal Article
Year
2021
Publication
Journal of High Energy Physics
Abbreviated Journal
J. High Energy Phys.
Volume
08
Issue
8
Pages
021 - 27pp
Keywords
Beyond Standard Model
;
Effective Field Theories
Abstract
We study the forward-backward asymmetry A(FB) in pp -> l(+)l(-) at the Z peak within the Standard Model Effective Field Theory (SMEFT). We find that this observable provides per mille level constraints on the vertex corrections of the Z boson to quarks, which close a flat direction in the electroweak precision SMEFT fit. Moreover, we show that current A(FB) data is precise enough so that its inclusion in the fit improves significantly LEP bounds even in simple New Physics setups. This demonstrates that the LHC can compete with and complement LEP when it comes to precision measurements of the Z boson properties.
Address
[Breso-Pla, Victor; Gonzalez-Alonso, Martin] Univ Valencia, Dept Fis Teor, IFIC, CSIC, Apt Correus 22085, E-46071 Valencia, Spain, Email: vicbreso@ific.uv.es;
Corporate Author
Thesis
Publisher
Springer
Place of Publication
Editor
Language
English
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
1029-8479
ISBN
Medium
Area
Expedition
Conference
Notes
WOS:000683833600002
Approved
no
Is ISI
yes
International Collaboration
yes
Call Number
IFIC @ pastor @
Serial
4935
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