Coherent photoproduction of $\rho^0$ vector mesons in ultra-peripheral Pb-Pb collisions at $\sqrt{s_{NN}} = $5.02 TeV

S. Acharya , Daniel Dąbrowski , Kamil Deja , Łukasz Graczykowski , Monika Jakubowska , Małgorzata Janik , Adam Kisiel , Julian Myrcha , Łukasz Neumann , Piotr Nowakowski , Janusz Oleniacz , Jan Pluta , Przemysław Rokita , Krystian Rosłon , M. O. Schmidt , Tomasz Trzciński , Hanna Zbroszczyk

Abstract

Cross sections for the coherent photoproduction of ρ0 vector mesons in ultra-peripheral Pb–Pb collisions at s√ = 5.02 TeV are reported. The measurements, which rely on the π+π− decay channel, are presented in three regions of rapidity covering the range |y| < 0.8. For each rapidity interval, cross sections are shown for different nuclear-breakup classes defined according to the presence of neutrons measured in the zero-degree calorimeters. The results are compared with predictions based on different models of nuclear shadowing. Finally, the observation of a coherently produced resonance-like structure with a mass around 1.7 GeV/c2 and a width of about 140 MeV/c2 is reported and compared with similar observations from other experiments.
Collective authorThe ALICE Collaboration
Author S. Acharya
S. Acharya,,
-
, Daniel Dąbrowski (FP / NPD)
Daniel Dąbrowski,,
- Nuclear Physics Division
, Kamil Deja (FEIT / ICS)
Kamil Deja,,
- The Institute of Computer Science
, Łukasz Graczykowski (FP / NPD)
Łukasz Graczykowski,,
- Nuclear Physics Division
, Monika Jakubowska (FoEE / ICIE)
Monika Jakubowska,,
- The Institute of Control and Industrial Electronics
, Małgorzata Janik (FP / NPD)
Małgorzata Janik,,
- Nuclear Physics Division
, Adam Kisiel (FP / NPD)
Adam Kisiel,,
- Nuclear Physics Division
, Julian Myrcha (FEIT / IN)
Julian Myrcha,,
- The Institute of Computer Science
, Łukasz Neumann (FEIT / ICS)
Łukasz Neumann,,
- The Institute of Computer Science
, Piotr Nowakowski (FEIT / ICS)
Piotr Nowakowski,,
- The Institute of Computer Science
et al.`
Total number of authors1004
Journal seriesJournal of High Energy Physics, ISSN 1029-8479, [1126-6708]
Issue year2020
Vol2020
No6
Pages1-28
Publication size in sheets1.35
Article number35
Keywords in EnglishHeavy Ion Experiments, Heavy-ion collision, Particle and resonance production
ASJC Classification3106 Nuclear and High Energy Physics
DOIDOI:10.1007/JHEP06(2020)035
URL https://link.springer.com/article/10.1007/JHEP06(2020)035
Languageen angielski
LicenseJournal (articles only); author's original; Uznanie Autorstwa (CC-BY); after publication
File
Coherent-photoproduction-of---vector-mesons-in-ultraperipheral-PbPb-collisions-at-sNN--502-TeV2020Journal-of-High-Energy-PhysicsOpen-Access.pdf 828.97 KB
Score (nominal)140
Score sourcejournalList
ScoreMinisterial score = 140.0, 17-09-2020, ArticleFromJournal
Publication indicators WoS Citations = 0; Scopus Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.132; WoS Impact Factor: 2018 = 5.833 (2) - 2018=4.911 (5)
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