dc.contributor.author | ALICE Collaboration | |
dc.date.accessioned | 2016-07-06T06:39:44Z | |
dc.date.available | 2016-07-06T06:39:44Z | |
dc.date.issued | 2016 | |
dc.identifier.citation | ALICE Collaboration. (2016). Measurement of an Excess in the Yield of J/ψ at Very Low pT in Pb-Pb Collisions at √sNN = 2.76 TeV. <i>Physical Review Letters</i>, <i>116</i>(22), Article 222301. <a href="https://doi.org/10.1103/PhysRevLett.116.222301" target="_blank">https://doi.org/10.1103/PhysRevLett.116.222301</a> | |
dc.identifier.other | CONVID_26095769 | |
dc.identifier.other | TUTKAID_70526 | |
dc.identifier.uri | https://jyx.jyu.fi/handle/123456789/50728 | |
dc.description.abstract | We report on the first measurement of an excess in the yield of J=ψ at very low transverse momentum
(pT < 0.3 GeV=c) in peripheral hadronic Pb-Pb collisions at √sNN=2.76 TeV,
performed by ALICE at
the CERN LHC. Remarkably, the measured nuclear modification factor of J=ψ in the rapidity range
2.5 <y< 4 reaches about 7 (2) in the pT range 0–0.3 GeV=c in the 70%–90% (50%–70%) centrality
class. The J=ψ production cross section associated with the observed excess is obtained under the
hypothesis that coherent photoproduction of J=ψ is the underlying physics mechanism. If confirmed, the
observation of J=ψ coherent photoproduction in Pb-Pb collisions at impact parameters smaller than twice
the nuclear radius opens new theoretical and experimental challenges and opportunities. In particular,
coherent photoproduction accompanying hadronic collisions may provide insight into the dynamics of
photoproduction and nuclear reactions, as well as become a novel probe of the quark-gluon plasma. | |
dc.language.iso | eng | |
dc.publisher | American Physical Society | |
dc.relation.ispartofseries | Physical Review Letters | |
dc.subject.other | tellurium compounds | |
dc.subject.other | hadronic collisions | |
dc.subject.other | impact-parameter | |
dc.subject.other | nuclear modification factors | |
dc.subject.other | pb-pb collisions | |
dc.subject.other | photoproductions | |
dc.subject.other | production cross section | |
dc.subject.other | transverse momenta | |
dc.title | Measurement of an Excess in the Yield of J/ψ at Very Low pT in Pb-Pb Collisions at √sNN = 2.76 TeV | |
dc.type | article | |
dc.identifier.urn | URN:NBN:fi:jyu-201607053472 | |
dc.contributor.laitos | Fysiikan laitos | fi |
dc.contributor.laitos | Department of Physics | en |
dc.type.uri | http://purl.org/eprint/type/JournalArticle | |
dc.date.updated | 2016-07-05T09:15:06Z | |
dc.type.coar | http://purl.org/coar/resource_type/c_2df8fbb1 | |
dc.description.reviewstatus | peerReviewed | |
dc.relation.issn | 0031-9007 | |
dc.relation.numberinseries | 22 | |
dc.relation.volume | 116 | |
dc.type.version | publishedVersion | |
dc.rights.copyright | © 2016 CERN, for the ALICE Collaboration, 2016. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. | |
dc.rights.accesslevel | openAccess | fi |
dc.subject.yso | ydinreaktiot | |
dc.subject.yso | kvarkki-gluoniplasma | |
jyx.subject.uri | http://www.yso.fi/onto/yso/p12413 | |
jyx.subject.uri | http://www.yso.fi/onto/yso/p38826 | |
dc.rights.url | https://creativecommons.org/licenses/by/3.0/ | |
dc.relation.doi | 10.1103/PhysRevLett.116.222301 | |
dc.type.okm | A1 | |