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Direct Photon Production at Next-to–Next-to-Leading Order

John M. Campbell1,*, R. Keith Ellis2,†, and Ciaran Williams3,‡

  • 1Fermilab, P.O. Box 500, Batavia, Illinois 60510, USA
  • 2Institute for Particle Physics Phenomenology, Department of Physics, University of Durham, Durham, DH1 3LE, United Kingdom
  • 3Department of Physics, University at Buffalo, The State University of New York, Buffalo, New York 14260, USA

  • *johnmc@fnal.gov
  • †keith.ellis@durham.ac.uk
  • ‡ciaranwi@buffalo.edu
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Phys. Rev. Lett. 118, 222001 – Published 31 May, 2017Erratum Phys. Rev. Lett. 124, 259901 (2020)

DOI: https://doi.org/10.1103/PhysRevLett.118.222001

Abstract

We present the first calculation of direct photon production at next-to-next-to-leading order (NNLO) accuracy in QCD. For this process, although the final-state cuts mandate only the presence of a single electroweak boson, the underlying kinematics resembles that of a generic vector boson plus jet topology. In order to regulate the infrared singularities present at this order, we use the N-jettiness slicing procedure, applied for the first time to a final state that at the Born level includes colored partons but no required jet. We compare our predictions to ATLAS 8 TeV data and find that the inclusion of the NNLO terms in the perturbative expansion, supplemented by electroweak corrections, provides an excellent description of the data with greatly reduced theoretical uncertainties.

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Erratum

Erratum: Direct Photon Production at Next-to–Next-to-Leading Order [Phys. Rev. Lett. 118, 222001 (2017)]

John M. Campbell, R. Keith Ellis, and Ciaran Williams
Phys. Rev. Lett. 124, 259901 (2020)

Article Text

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Phys. Rev. Lett. 118, 222001– Published 31 May, 2017
  • Received 10 January 2017
Article part of CHORUS

© 2017 American Physical Society

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