Driving Miss Data: Going up a gear to NNLO

Abstract

In this paper we present a calculation of the $\gamma +j$ process at next-to-next-to-leading order (NNLO) in QCD and compare the resulting predictions to 8 TeV CMS data. We find good agreement with the shape of the photon $p_T$ spectrum, particularly after the inclusion of additional electroweak corrections, but there is a tension between the overall normalization of the theoretical prediction and the measurement. We use our results to compute the ratio of $Z(\to {\ell }^{+}{\ell }^{-})+j$ to $\gamma +j$ events as a function of the vector boson transverse momentum at NNLO, a quantity that is used to normalize $Z(\to \nu \overline{\nu })+j$ backgrounds in searches for dark matter and supersymmetry. Our NNLO calculation significantly reduces the theoretical uncertainty on this ratio, thus boosting its power for future searches of new physics.

12 pages, 11 Figures, 2 Tables

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• Power Corrections for N-Jettiness Subtractions at $\mathcal{O}({\alpha }_s)$
• NNLO predictions for Z-boson pair production at the LHC
• Jet production in charged-current deep-inelastic scattering to third order in QCD
• H+1 jet production revisited
• The NNLO QCD soft function for 1-jettiness
• Photon Fragmentation in the Antenna Subtraction Formalism
• Analytic results for deep-inelastic scattering at NNLO QCD with the nested soft-collinear subtraction scheme
• Isolated photon and photon+jet production at NNLO QCD accuracy
• Jet cross sections and transverse momentum distributions with NNLOJET
• Vector Bosons and Jets in Proton Collisions
• Associated production of a top-quark pair with two isolated photons at the LHC through NLO in QCD
• Single Photon Production at Hadron Colliders at NNLO QCD with Realistic Photon Isolation
• QCD anatomy of photon isolation
• Three-loop soft function for energetic electroweak boson production at hadron colliders
• Non-global logarithms up to four loops at finite-N${}_c$ for V/H+jet processes at hadron colliders
• Two-loop mixed QCD-electroweak amplitudes for $Z+$jet production at the LHC: bosonic corrections