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dc.contributor.authorDucloue, Bertrand
dc.contributor.authorIancu, E.
dc.contributor.authorLappi, Tuomas
dc.contributor.authorMueller, A. H.
dc.contributor.authorSoyez, G.
dc.contributor.authorTriantafyllopoulos, D. N.
dc.contributor.authorZhu, Yan
dc.date.accessioned2018-03-22T10:37:19Z
dc.date.available2018-03-22T10:37:19Z
dc.date.issued2018
dc.identifier.citationDucloue, B., Iancu, E., Lappi, T., Mueller, A. H., Soyez, G., Triantafyllopoulos, D. N., & Zhu, Y. (2018). Use of a running coupling in the NLO calculation of forward hadron production. <i>Physical Review D</i>, <i>97</i>(5), Article 054020. <a href="https://doi.org/10.1103/PhysRevD.97.054020" target="_blank">https://doi.org/10.1103/PhysRevD.97.054020</a>
dc.identifier.otherCONVID_27961026
dc.identifier.otherTUTKAID_77129
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/57387
dc.description.abstractWe address and solve a puzzle raised by a recent calculation [1] of the cross section for particle production in proton-nucleus collisions to next-to-leading order: the numerical results show an unreasonably large dependence upon the choice of a prescription for the QCD running coupling, which spoils the predictive power of the calculation. Specifically, the results obtained with a prescription formulated in the transverse coordinate space differ by 1 to 2 orders of magnitude from those obtained with a prescription in momentum space. We show that this discrepancy is an artifact of the interplay between the asymptotic freedom of QCD and the Fourier transform from coordinate space to momentum space. When used in coordinate space, the running coupling can act as a fictitious potential which mimics hard scattering and thus introduces a spurious contribution to the cross section. We identify a new coordinate-space prescription, which avoids this problem, and leads to results consistent with those obtained with the momentum-space prescription.
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.ispartofseriesPhysical Review D
dc.subject.otherhard scattering
dc.subject.otherquantum chromodynamics
dc.subject.otherrelativistic heavy-ion collision
dc.subject.othernuclear physicss
dc.titleUse of a running coupling in the NLO calculation of forward hadron production
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201803211792
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.date.updated2018-03-21T13:15:06Z
dc.description.reviewstatuspeerReviewed
dc.relation.issn2470-0010
dc.relation.numberinseries5
dc.relation.volume97
dc.type.versionpublishedVersion
dc.rights.copyright© the Authors, 2018. Published by the American Physical Society. This is an open access article distributed under the terms of the Creative Commons License. Funded by SCOAP3.
dc.rights.accesslevelopenAccessfi
dc.subject.ysoydinfysiikka
dc.subject.ysosironta
dc.subject.ysokvanttifysiikka
jyx.subject.urihttp://www.yso.fi/onto/yso/p14759
jyx.subject.urihttp://www.yso.fi/onto/yso/p1026
jyx.subject.urihttp://www.yso.fi/onto/yso/p5564
dc.rights.urlhttps://creativecommons.org/licenses/by/4.0/
dc.relation.doi10.1103/PhysRevD.97.054020


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© the Authors, 2018. Published by the American Physical Society. This is an open access article distributed under the terms of the Creative Commons License. Funded by SCOAP3.
Except where otherwise noted, this item's license is described as © the Authors, 2018. Published by the American Physical Society. This is an open access article distributed under the terms of the Creative Commons License. Funded by SCOAP3.