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dc.contributor.author
Catani, Stefano
dc.contributor.author
Cieri, Leandro
dc.contributor.author
de Florian, Daniel Enrique
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dc.contributor.author
Ferrera, Giancarlo
dc.contributor.author
Grazzini, Massimiliano
dc.date.available
2020-03-12T15:53:37Z
dc.date.issued
2018-04
dc.identifier.citation
Catani, Stefano; Cieri, Leandro; de Florian, Daniel Enrique; Ferrera, Giancarlo; Grazzini, Massimiliano; Diphoton production at the LHC: a QCD study up to NNLO; Springer; Journal of High Energy Physics; 2018; 4; 4-2018; 1-76
dc.identifier.issn
1029-8479
dc.identifier.uri
http://hdl.handle.net/11336/99271
dc.description.abstract
We consider the production of prompt-photon pairs at the LHC and we report on a study of QCD radiative corrections up to the next-to-next-to-leading order (NNLO). We present a detailed comparison of next-to-leading order (NLO) results obtained within the standard and smooth cone isolation criteria, by studying the dependence on the isolation parameters. We highlight the role of different partonic subprocesses within the two isolation criteria, and we show that they produce large radiative corrections for both criteria. Smooth cone isolation is a consistent procedure to compute QCD radiative corrections at NLO and beyond. If photon isolation is sufficiently tight, we show that the NLO results for the two isolation procedures are consistent with each other within their perturbative uncertainties. We then extend our study to NNLO by using smooth cone isolation. We discuss the impact of the NNLO corrections and the corresponding perturbative uncertainties for both fiducial cross sections and distributions, and we comment on the comparison with some LHC data. Throughout our study we remark on the main features that are produced by the kinematical selection cuts that are applied to the photons. In particular, we examine soft-gluon singularities that appear in the perturbative computations of the invariant mass distribution of the photon pair, the transverse-momentum spectra of the photons, and the fiducial cross section with asymmetric and symmetric photon transverse-momentum cuts, and we present their behaviour in analytic form.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
QCD PHENOMENOLOGY
dc.subject.classification
Física de Partículas y Campos
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dc.subject.classification
Ciencias Físicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Diphoton production at the LHC: a QCD study up to NNLO
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-03-03T15:06:14Z
dc.identifier.eissn
1126-6708
dc.journal.volume
2018
dc.journal.number
4
dc.journal.pagination
1-76
dc.journal.pais
Alemania
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dc.journal.ciudad
Berlin
dc.description.fil
Fil: Catani, Stefano. Universidad de Florencia; Italia
dc.description.fil
Fil: Cieri, Leandro. Istituto Nazionale di Fisica Nucleare; Italia. Universitat Zurich; Suiza
dc.description.fil
Fil: de Florian, Daniel Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Martín. Escuela de Ciencia y Tecnología. Centro Internacional de Estudios Avanzados; Argentina
dc.description.fil
Fil: Ferrera, Giancarlo. Università degli Studi di Milano; Italia
dc.description.fil
Fil: Grazzini, Massimiliano. Universitat Zurich; Suiza
dc.journal.title
Journal of High Energy Physics
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/JHEP04(2018)142
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007%2FJHEP04%282018%29142
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