Consistent Searches for SMEFT Effects in Non-Resonant Dijet Events

Abstract

We investigate the bounds which can be placed on generic new-physics contributions to dijet production at the LHC using the framework of the Standard Model Effective Field Theory, deriving the first consistently-treated EFT bounds from non-resonant high-energy data. We recast an analysis searching for quark compositeness, equivalent to treating the SM with one higher-dimensional operator as a complete UV model. In order to reach consistent, model-independent EFT conclusions, it is necessary to truncate the EFT effects consistently at order $1/{\Lambda }^2$ and to include the possibility of multiple operators simultaneously contributing to the observables, neither of which has been done in previous searches of this nature. Furthermore, it is important to give consistent error estimates for the theoretical predictions of the signal model, particularly in the region of phase space where the probed energy is approaching the cutoff scale of the EFT. There are two linear combinations of operators which contribute to dijet production in the SMEFT with distinct angular behavior; we identify those linear combinations and determine the ability of LHC searches to constrain them simultaneously. Consistently treating the EFT generically leads to weakened bounds on new-physics parameters. These constraints will be a useful input to future global analyses in the SMEFT framework, and the techniques used here to consistently search for EFT effects are directly applicable to other off-resonance signals.

v1: 23 pages, 9 figures, 3 tables; v2: references added, typos corrected, matches version published in JHEP

References in corpus (16)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Extending the Standard Model Effective Field Theory with the Complete Set of Dimension-7 Operators
• Search for new phenomena in dijet events using 37 fb${}^{-1}$ of $pp$ collision data collected at $\sqrt{s}=$13 TeV with the ATLAS detector
• Complete Higgs Sector Constraints on Dimension-6 Operators
• Model-independent precision constraints on dimension-6 operators
• Operator bases, $S$-matrices, and their partition functions
• Hilbert Series for Constructing Lagrangians: expanding the phenomenologist's toolbox
• Helicity Selection Rules and Non-Interference for BSM Amplitudes
• Vices and Virtues of Higgs EFTs at Large Energy
• A Systematic Approach to the SILH Lagrangian
• Effective Theories and Measurements at Colliders
• Precision Probes of QCD at High Energies
• QCD radiative corrections for $h\to b\bar{b}$ in the Standard Model Dimension-6 EFT
• Search for New Phenomena in Dijet Angular Distributions in Proton-Proton Collisions at $\sqrt{s}=8$ TeV Measured with the ATLAS Detector
• Search for quark contact interactions and extra spatial dimensions using dijet angular distributions in proton-proton collisions at sqrt(s) = 8 TeV
• Matching Matters!

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• Consistent Searches for SMEFT Effects in Non-Resonant Dilepton Events
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