dc.contributor.author | ALICE Collaboration | |
dc.date.accessioned | 2016-02-10T11:18:30Z | |
dc.date.available | 2016-02-10T11:18:30Z | |
dc.date.issued | 2016 | |
dc.identifier.citation | ALICE Collaboration. (2016). Direct photon production in Pb–Pb collisions at √sNN = 2.76 TeV. <i>Physics Letters B</i>, <i>754</i>, 235-248. <a href="https://doi.org/10.1016/j.physletb.2016.01.020" target="_blank">https://doi.org/10.1016/j.physletb.2016.01.020</a> | |
dc.identifier.other | CONVID_25529727 | |
dc.identifier.other | TUTKAID_69081 | |
dc.identifier.uri | https://jyx.jyu.fi/handle/123456789/48733 | |
dc.description.abstract | Direct photon production at mid-rapidity in Pb–Pb collisions at √sNN = 2.76 TeV was studied in the
transverse momentum range 0.9 < pT < 14 GeV/c. Photons were detected with the highly segmented
electromagnetic calorimeter PHOS and via conversions in the ALICE detector material with the e+e−
pair reconstructed in the central tracking system. The results of the two methods were combined and
direct photon spectra were measured for the 0–20%, 20–40%, and 40–80% centrality classes. For all three
classes, agreement was found with perturbative QCD calculations for pT 5 GeV/c. Direct photon spectra
down to pT ≈ 1 GeV/c could be extracted for the 20–40% and 0–20% centrality classes. The significance
of the direct photon signal for 0.9 < pT < 2.1 GeV/c is 2.6σ for the 0–20% class. The spectrum in this
pT range and centrality class can be described by an exponential with an inverse slope parameter of
(297 ± 12stat ± 41syst) MeV. State-of-the-art models for photon production in heavy-ion collisions agree
with the data within uncertainties. | |
dc.language.iso | eng | |
dc.publisher | Elsevier B.V. | |
dc.relation.ispartofseries | Physics Letters B | |
dc.subject.other | ALICE experiment | |
dc.subject.other | direct photon production | |
dc.subject.other | LHC | |
dc.subject.other | Pb-Pb collisions | |
dc.title | Direct photon production in Pb–Pb collisions at √sNN = 2.76 TeV | |
dc.type | article | |
dc.identifier.urn | URN:NBN:fi:jyu-201602091512 | |
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 | 2016-02-09T10:15:07Z | |
dc.type.coar | http://purl.org/coar/resource_type/c_2df8fbb1 | |
dc.description.reviewstatus | peerReviewed | |
dc.format.pagerange | 235-248 | |
dc.relation.issn | 0370-2693 | |
dc.relation.numberinseries | 0 | |
dc.relation.volume | 754 | |
dc.type.version | publishedVersion | |
dc.rights.copyright | © 2016 CERN for the benefit of the ALICE Collaboration. Published by Elsevier B.V. This is an open
access article under the CC BY license. Funded by SCOAP3. | |
dc.rights.accesslevel | openAccess | fi |
dc.rights.url | http://creativecommons.org/licenses/by/4.0/ | |
dc.relation.doi | 10.1016/j.physletb.2016.01.020 | |
dc.type.okm | A1 | |