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

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

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Authors

John M. Campbell

Ciaran Williams



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.

Citation

Campbell, J. M., Ellis, R. K., & Williams, C. (2017). Direct Photon Production at Next-to–Next-to-Leading Order. Physical Review Letters, 118(22), Article 222001. https://doi.org/10.1103/physrevlett.118.222001

Journal Article Type Article
Acceptance Date Jan 10, 2017
Online Publication Date May 31, 2017
Publication Date May 31, 2017
Deposit Date Jul 6, 2017
Publicly Available Date Mar 28, 2024
Journal Physical Review Letters
Print ISSN 0031-9007
Electronic ISSN 1079-7114
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 118
Issue 22
Article Number 222001
DOI https://doi.org/10.1103/physrevlett.118.222001

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Copyright Statement
Reprinted with permission from the American Physical Society: Physical Review Letters 118, 222001 © (2017) by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.





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