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

Campbell, John M.; Ellis, R. Keith; Williams, Ciaran

doi:10.1103/PhysRevLett.118.222001

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

Journal Article · Wed May 31 00:00:00 EDT 2017 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.118.222001· OSTI ID:1345624

Campbell, John M. ^[1]; Ellis, R. Keith ^[2]; Williams, Ciaran ^[3]

Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Univ. of Durham, Durham (United Kingdom)
The State Univ. of New York, Buffalo, NY (United States)

Here, 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 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.

View Accepted Manuscript (DOE)

Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

Grant/Contract Number:: AC02-07CH11359

OSTI ID:: 1345624

Report Number(s):: IPPP--16-115; FERMILAB-PUB--16-585-T; arXiv:1612.04333; 1503171

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 22 Vol. 118; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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The double-soft integral for an arbitrary angle between hard radiators Caola, Fabrizio; Delto, Maximilian; Frellesvig, Hjalte arXiv https://doi.org/10.48550/arxiv.1807.05835	text	January 2018
Measurement of the inclusive isolated-photon cross section in $pp$ collisions at $\sqrt{s}=13$ TeV using 36 fb$^{-1}$ of ATLAS data Collaboration, Atlas arXiv https://doi.org/10.48550/arxiv.1908.02746	text	January 2019
Open-source QCD analysis of nuclear parton distribution functions at NLO and NNLO Walt, Marina; Helenius, Ilkka; Vogelsang, Werner arXiv https://doi.org/10.48550/arxiv.1908.03355	text	January 2019
Diphoton production at the LHC: a QCD study up to NNLO Stefano, Catani,; Leandro, Cieri,; Daniel, de Florian, Springer https://doi.org/10.5167/uzh-153737	text	January 2018
Next-to-Next-to-Leading-Order QCD Corrections to the Transverse Momentum Distribution of Weak Gauge Bosons Gehrmann-De Ridder, A.; Gehrmann, T.; Glover, E. W. N. American Physical Society https://doi.org/10.5167/uzh-166278	text	January 2018
The double-soft integral for an arbitrary angle between hard radiators Caola, Fabrizio; Delto, Maximilian; Frellesvig, Hjalte Karlsruhe https://doi.org/10.5445/ir/1000085735	text	January 2018
Measurement of differential cross sections for inclusive isolated-photon and photon+jet production in proton-proton collisions at $\sqrt{s} = 13\,\text {TeV} $ Sirunyan, A. M.; Tumasyan, A.; Adam, W. Karlsruhe https://doi.org/10.5445/ir/1000089881	text	January 2019
Measurement of the inclusive isolated-photon cross section in pp collisions at \sqrts=13 TeV using 36 fb⁻¹ of ATLAS data Franconi, Laura; Miucci, A.; Merlassino, C. Springer https://doi.org/10.7892/boris.143559	text	January 2019
Measurement of the ratio of cross sections for inclusive isolated-photon production in pp collisions at √s = 13 and 8 TeV with the ATLAS detector Miucci, Antonio; Merlassino, Claudia; Haug, Sigve Springer https://doi.org/10.7892/boris.143606	text	January 2019

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