Shift-Type SMEFT Effects in Dileptons at the LHC

Abstract

We explore the constraints which can be derived on Wilson coefficients in the Standard Model Effective Field Theory from dilepton production, notably including the constraints on operators which do not lead to cross sections growing with energy relative to the Standard Model rate, i.e. shifts. We incorporate essential theory error estimates from higher EFT orders in the analysis in order to provide robust bounds. We find that constraints on four-fermion operator contributions which do grow with energy are not materially weakened by the inclusion of these shifts, and that a constraint on the shifts can also be derived, with a characteristic strength comparable to, and a directionality in parameter space complementary to, those from LEP data. This completes the study of hadronically-quiet dilepton production in the SMEFT, and provides two new constraints which are linearly independent from others arising at the LHC and also rotated in Wilson coefficient space relative to, though not completely independent from, the LEP bounds.

arXiv comment16 pages, 2 figures

References in corpus (25)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Dimension-Six Terms in the Standard Model Lagrangian
• The Standard Model as an Effective Field Theory
• Dimension-8 Operators in the Standard Model Effective Field Theory
• The SMEFTsim package, theory and tools
• Extending the Standard Model Effective Field Theory with the Complete Set of Dimension-7 Operators
• High-$p_T$ dilepton tails and flavour physics
• Compilation of low-energy constraints on 4-fermion operators in the SMEFT
• Energy helps accuracy: electroweak precision tests at hadron colliders
• Low-derivative operators of the Standard Model effective field theory via Hilbert series methods
• Towards consistent Electroweak Precision Data constraints in the SMEFT
• Consistent constraints on the Standard Model Effective Field Theory
• An explicit construction of the dimension-9 operator basis in the standard model effective field theory
• Charm Physics Confronts High-$p_T$ Lepton Tails
• Global Constraints on Lepton-Quark Contact Interactions
• Catching a New Force by the Tail
• SMEFT and the Drell-Yan Process at High Energy
• Incorporating doubly resonant $W^{\pm }$ data in a global fit of SMEFT parameters to lift flat directions
• NLO QCD corrections to SM-EFT dilepton and electroweak Higgs boson production, matched to parton shower in POWHEG
• The $Z$ decay width in the SMEFT: $y_t$ and $\lambda$ corrections at one loop
• Interpreting $W$ mass measurements in the SMEFT
• Consistent Searches for SMEFT Effects in Non-Resonant Dijet Events
• Consistent Searches for SMEFT Effects in Non-Resonant Dilepton Events

Cited by in corpus (6)

• Top, Higgs, Diboson and Electroweak Fit to the Standard Model Effective Field Theory
• $A_{FB}$ in the SMEFT: precision Z physics at the LHC
• Exploring the SMEFT at dimension-8 with Drell-Yan transverse momentum measurements
• A methodology for theory uncertainties in the SMEFT
• A tale of $Z$+jet: SMEFT effects and the Lam-Tung relation
• Drell-Yan production in universal theories beyond dimension-six SMEFT