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Impact of high invariant-mass Drell-Yan forward-backward asymmetry measurements on SMEFT fits

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arxiv 2303.08257 v2 pith:B5QUHNDN submitted 2023-03-14 hep-ph

Radja Boughezal , Yingsheng Huang , Frank Petriello This is my paper · ORCID
classification hep-ph
keywords invariant-massmeasurementsdatadrell-yanfitsimpactsmeftasymmetry
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We study the impact of LHC forward-backward asymmetry (AFB) measurements at high invariant-mass in the Drell-Yan process on probes of semileptonic four-fermion operators in the Standard Model effective field theory (SMEFT). In particular, we study whether AFB measurements can resolve degeneracies in the Wilson coefficient parameter space that appear when considering invariant-mass and rapidity measurements alone. We perform detailed fits of the available high-energy and high-luminosity ATLAS and CMS data for both invariant-mass distributions and AFB. While each type of measurement separately exhibits degeneracies, combining them removes these blind spots in some cases. In other situations it does not, highlighting the importance of incorporating future datasets from other experiments to fully explore this sector of the SMEFT. We investigate the impact of contributions quadratic in the Wilson coefficients on the description of Drell-Yan data and discuss when such terms are important in joint fits of the AFB and invariant-mass data.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. On the EFT validity for Drell-Yan tails at the LHC

    hep-ph 2024-12 conditional novelty 6.0 of 10

    For t-channel mediators such as the U1 leptoquark, Drell-Yan EFT bounds are accurate at the 10% level for masses above about 1.5 TeV when the series is truncated at amplitude level, while s-channel mediators need E mu...

  2. A tale of $Z$+jet: SMEFT effects and the Lam-Tung relation

    hep-ph 2024-12 conditional novelty 5.0 of 10

    Light-quark dipole operators cannot explain the observed violation of the Lam-Tung relation once SLC/LEP and LHC data are used to bound the Wilson coefficients.

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