SMEFT and the Drell-Yan Process at High Energy

S. Dawson , P. P. Giardino , A. Ismail

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classification ✦ hep-ph

keywords drell-yanenergyhighprocesseffectsoperatorsproductionsensitivity

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The Drell-Yan process is a copious source of lepton pairs at high energy and is measured with great precision at the Large Hadron Collider (LHC). Barring any new light particles, beyond the Standard Model effects can be studied in Drell-Yan production using an effective field theory. At tree level, new 4-fermion interactions dominate, while at one loop operators modifying 3-gauge boson couplings contribute effects that are enhanced at high energy. We study the sensitivity of the neutral Drell-Yan process to these dimension-6 operators and compare the sensitivity to that of $W^+W^-$ pair production at the LHC.

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Constraining dimension-6 SMEFT with higher-order predictions for $p p \to t W$
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Higher-order QCD predictions for pp to tW enable three-parameter SMEFT fits that constrain effective new-physics scales to 0.5–2 TeV using LHC Run II and III data.