%0 Generic %1 boughezal2021dilepton %A Boughezal, Radja %A Mereghetti, Emanuele %A Petriello, Frank %D 2021 %K eft %T Dilepton production in the SMEFT at $O(1/Łambda^4)$ %U http://arxiv.org/abs/2106.05337 %X We study the inclusion of $O(1/Łambda^4)$ effects in the Standard Model Effective Field Theory in fits to the current Drell-Yan data at the LHC. Our analysis includes the full set of dimension-6 and dimension-8 operators contributing to the dilepton process, and is performed to next-to-leading-order in the QCD coupling constant at both $O(1/Łambda^2)$ and $\mathcal O(1/Łambda^4)$. We find that the inclusion of dimension-6 squared terms and certain dimension-8 operators has significant effects on fits to the current data. Neglecting them leads to bounds on dimension-6 operators off by large factors. We find that dimension-8 four-fermion operators can already be probed to the several-TeV level by LHC results, and that their inclusion significantly changes the limits found for dimension-6 operators. We discuss which dimension-8 operators should be included in fits to the LHC data. Only a manageable subset of two-derivative dimension-8 four-fermion operators need to be included at this stage given current LHC uncertainties.

@misc{boughezal2021dilepton, abstract = {We study the inclusion of $\mathcal O(1/\Lambda^4)$ effects in the Standard Model Effective Field Theory in fits to the current Drell-Yan data at the LHC. Our analysis includes the full set of dimension-6 and dimension-8 operators contributing to the dilepton process, and is performed to next-to-leading-order in the QCD coupling constant at both $\mathcal O(1/\Lambda^2)$ and $\mathcal O(1/\Lambda^4)$. We find that the inclusion of dimension-6 squared terms and certain dimension-8 operators has significant effects on fits to the current data. Neglecting them leads to bounds on dimension-6 operators off by large factors. We find that dimension-8 four-fermion operators can already be probed to the several-TeV level by LHC results, and that their inclusion significantly changes the limits found for dimension-6 operators. We discuss which dimension-8 operators should be included in fits to the LHC data. Only a manageable subset of two-derivative dimension-8 four-fermion operators need to be included at this stage given current LHC uncertainties.}, added-at = {2021-09-23T11:34:14.000+0200}, author = {Boughezal, Radja and Mereghetti, Emanuele and Petriello, Frank}, biburl = {https://www.bibsonomy.org/bibtex/2873af1d8177429bca63bb30ddc766d54/hami}, description = {[2106.05337] Dilepton production in the SMEFT at $\mathcal O(1/Λ^4)$}, interhash = {15df6684151406f232d72ae843051873}, intrahash = {873af1d8177429bca63bb30ddc766d54}, keywords = {eft}, note = {cite arxiv:2106.05337Comment: 38 pages, 10 figures, 8 tables}, timestamp = {2021-09-23T11:34:14.000+0200}, title = {Dilepton production in the SMEFT at $\mathcal O(1/\Lambda^4)$}, url = {http://arxiv.org/abs/2106.05337}, year = 2021 }