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dc.contributor.authorEskola, Kari J.
dc.contributor.authorPaakkinen, Petja
dc.contributor.authorPaukkunen, Hannu
dc.contributor.authorSalgado, Carlos A.
dc.date.accessioned2022-04-04T10:35:26Z
dc.date.available2022-04-04T10:35:26Z
dc.date.issued2022
dc.identifier.citationEskola, K. J., Paakkinen, P., Paukkunen, H., & Salgado, C. A. (2022). Proton-PDF uncertainties in extracting nuclear PDFs from W± production in p+Pb collisions. <i>European Physical Journal C</i>, <i>82</i>, Article 271. <a href="https://doi.org/10.1140/epjc/s10052-022-10179-2" target="_blank">https://doi.org/10.1140/epjc/s10052-022-10179-2</a>
dc.identifier.otherCONVID_117518941
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/80468
dc.description.abstractWe discuss the recent CMS Collaboration measurement of W± boson production in p+Pb collisions at 8.16 TeV in terms of the constraining power on nuclear parton distribution functions (PDFs). The impact of the free-proton PDF uncertainties on the nuclear PDF extraction is quantified by using a theoretical covariance-matrix method and Hessian PDF reweighting. We discuss different ways to mitigate these theoretical uncertainties, including self-normalization, forward-to-backward ratios and nuclear-modification ratios. It is found that none of these methods offer perfect cancellation of the free-proton PDFs but, with the present data uncertainties, the residual free-proton-PDF dependence has, conveniently for the global analyses, little effect on the extraction of the nuclear modifications. Based on a simple estimate of obtainable statistics at the LHC Run 3, we argue that this will change in the near future and it becomes more important to propagate the proton-PDF uncertainties accordingly. Using the obtained information on the correlations of the free-proton uncertainties, we also identify a new charge asymmetry ratio, where the cancellation of the proton-PDF uncertainties is found to be extremely good.en
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherSpringer
dc.relation.ispartofseriesEuropean Physical Journal C
dc.rightsCC BY 4.0
dc.titleProton-PDF uncertainties in extracting nuclear PDFs from W± production in p+Pb collisions
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-202204042147
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.type.coarhttp://purl.org/coar/resource_type/c_2df8fbb1
dc.description.reviewstatuspeerReviewed
dc.relation.issn1434-6044
dc.relation.volume82
dc.type.versionpublishedVersion
dc.rights.copyright© The Author(s) 2022
dc.rights.accesslevelopenAccessfi
dc.relation.grantnumber330448
dc.relation.grantnumber346325
dc.relation.grantnumber308301
dc.subject.ysoydinfysiikka
dc.subject.ysohiukkasfysiikka
dc.format.contentfulltext
jyx.subject.urihttp://www.yso.fi/onto/yso/p14759
jyx.subject.urihttp://www.yso.fi/onto/yso/p15576
dc.rights.urlhttps://creativecommons.org/licenses/by/4.0/
dc.relation.doi10.1140/epjc/s10052-022-10179-2
dc.relation.funderResearch Council of Finlanden
dc.relation.funderResearch Council of Finlanden
dc.relation.funderResearch Council of Finlanden
dc.relation.funderSuomen Akatemiafi
dc.relation.funderSuomen Akatemiafi
dc.relation.funderSuomen Akatemiafi
jyx.fundingprogramAcademy Project, AoFen
jyx.fundingprogramCentre of Excellence, AoFen
jyx.fundingprogramAcademy Research Fellow, AoFen
jyx.fundingprogramAkatemiahanke, SAfi
jyx.fundingprogramHuippuyksikkörahoitus, SAfi
jyx.fundingprogramAkatemiatutkija, SAfi
jyx.fundinginformationWe acknowledge financial support from Xunta de Galicia (Centro singular de investigación de Galicia accreditation 2019-2022), European Union ERDF, the “María de Maeztu” Units of Excellence program MDM-2016-0692 and the Spanish Research State Agency, European Research Council project ERC-2018-ADG-835105 YoctoLHC (C.A.S. and P.P.), and from the Academy of Finland projects 308301 (H.P.) and 330448 (K.J.E. and P.P.). This research was funded as a part of the Center of Excellence in Quark Matter of the Academy of Finland (project 346325).
dc.type.okmA1


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