dc.contributor.author | ALICE Collaboration | |
dc.date.accessioned | 2021-09-13T08:30:27Z | |
dc.date.available | 2021-09-13T08:30:27Z | |
dc.date.issued | 2021 | |
dc.identifier.citation | ALICE Collaboration. (2021). Coherent J/ψ and ψ′ photoproduction at midrapidity in ultra-peripheral Pb–Pb collisions at √sNN = 5.02 TeV. <i>European Physical Journal C</i>, <i>81</i>(8), Article 712. <a href="https://doi.org/10.1140/epjc/s10052-021-09437-6" target="_blank">https://doi.org/10.1140/epjc/s10052-021-09437-6</a> | |
dc.identifier.other | CONVID_100930147 | |
dc.identifier.uri | https://jyx.jyu.fi/handle/123456789/77764 | |
dc.description.abstract | The coherent photoproduction of J/ψ and ψ′ mesons was measured in ultra-peripheral Pb–Pb collisions at a center-of-mass energy √sNN = 5.02 TeV with the ALICE detector. Charmonia are detected in the central rapidity region for events where the hadronic interactions are strongly suppressed. The J/ψ is reconstructed using the dilepton (l+l−) and proton–antiproton decay channels, while for the ψ′ the dilepton and the l+l−π+π− decay channels are studied. The analysis is based on an event sample corresponding to an integrated luminosity of about 233 μb−1. The results are compared with theoretical models for coherent J/ψ and ψ′ photoproduction. The coherent cross section is found to be in a good agreement with models incorporating moderate nuclear gluon shadowing of about 0.64 at a Bjorken-x of around 6×10−4, such as the EPS09 parametrization, however none of the models is able to fully describe the rapidity dependence of the coherent J/ψ cross section including ALICE measurements at forward rapidity. The ratio of ψ′ to J/ψ coherent photoproduction cross sections was also measured and found to be consistent with the one for photoproduction off protons. | en |
dc.format.mimetype | application/pdf | |
dc.language.iso | eng | |
dc.publisher | Springer | |
dc.relation.ispartofseries | European Physical Journal C | |
dc.rights | CC BY 4.0 | |
dc.title | Coherent J/ψ and ψ′ photoproduction at midrapidity in ultra-peripheral Pb–Pb collisions at √sNN = 5.02 TeV | |
dc.type | research article | |
dc.identifier.urn | URN:NBN:fi:jyu-202109134857 | |
dc.contributor.laitos | Fysiikan laitos | fi |
dc.contributor.laitos | Department of Physics | en |
dc.contributor.oppiaine | Ydin- ja kiihdytinfysiikan huippuyksikkö | fi |
dc.contributor.oppiaine | Fysiikka | fi |
dc.contributor.oppiaine | Centre of Excellence in Nuclear and Accelerator Based Physics | en |
dc.contributor.oppiaine | Physics | en |
dc.type.uri | http://purl.org/eprint/type/JournalArticle | |
dc.type.coar | http://purl.org/coar/resource_type/c_2df8fbb1 | |
dc.description.reviewstatus | peerReviewed | |
dc.relation.issn | 1434-6044 | |
dc.relation.numberinseries | 8 | |
dc.relation.volume | 81 | |
dc.type.version | publishedVersion | |
dc.rights.copyright | © CERN for the benefit of the ALICE Collaboration 2021 | |
dc.rights.accesslevel | openAccess | fi |
dc.type.publication | article | |
dc.subject.yso | hiukkasfysiikka | |
dc.subject.yso | ydinfysiikka | |
dc.format.content | fulltext | |
jyx.subject.uri | http://www.yso.fi/onto/yso/p15576 | |
jyx.subject.uri | http://www.yso.fi/onto/yso/p14759 | |
dc.rights.url | https://creativecommons.org/licenses/by/4.0/ | |
dc.relation.doi | 10.1140/epjc/s10052-021-09437-6 | |
dc.type.okm | A1 | |