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Parton distributions in the SMEFT from high-energy Drell-Yan tails

Greljo, Admir and Iranipour, Shayan and Kassabov, Zahari and Madigan, Maeve and Moore, James and Rojo, Juan and Ubiali, Maria and Voisey, Cameron. (2021) Parton distributions in the SMEFT from high-energy Drell-Yan tails. Journal of High Energy Physics, 2021 (07). p. 122.

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Official URL: https://edoc.unibas.ch/95395/

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Abstract

The high-energy tails of charged- and neutral-current Drell-Yan processes provide important constraints on the light quark and anti-quark parton distribution functions (PDFs) in the large-x region. At the same time, short-distance new physics effects such as those encoded by the Standard Model Effective Field Theory (SMEFT) would induce smooth distortions to the same high-energy Drell-Yan tails. In this work, we assess for the first time the interplay between PDFs and EFT effects for high-mass Drell-Yan processes at the LHC and quantify the impact that the consistent joint determination of PDFs and Wilson coefficients has on the bounds derived for the latter. We consider two well-motivated new physics scenarios: 1) electroweak oblique corrections (W^,Y^) and 2) four-fermion interactions potentially related to the LHCb anomalies in R(K(*)). We account for available Drell-Yan data, both from unfolded cross sections and from searches, and carry out dedicated projections for the High-Luminosity LHC. Our main finding is that, while the interplay between PDFs and EFT effects remains moderate for the current dataset, it will become a significant challenge for EFT analyses at the HL-LHC.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretische Teilchenphysik und Kosmologie (Greljo)
UniBasel Contributors:Greljo, Admir
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Springer
ISSN:1126-6708
e-ISSN:1029-8479
Note:Publication type according to Uni Basel Research Database: Journal article
Language:English
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Last Modified:16 Aug 2023 09:06
Deposited On:16 Aug 2023 09:06

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