Production of the $\rho (770)^{0}$ meson in $pp$ and Pb-Pb collisions at $\sqrt{s_{NN}} = 2.76\,{\rm TeV}$

S. Acharya , Łukasz Graczykowski , Małgorzata Janik , Adam Kisiel , Julian Myrcha , Jeremi Niedziela , Janusz Oleniacz , Jan Pluta , Przemysław Rokita , Krystian Rosłon , Tomasz Trzciński , Hanna Zbroszczyk , Monika Jakubowska

Abstract

The production of the ρ(770)0 meson has been measured at midrapidity (|y|<0.5) in pp and centrality differential Pb-Pb collisions at √sNN= 2.76 TeV with the ALICE detector at the Large Hadron Collider. The particles have been reconstructed in the ρ(770)0→π+π− decay channel in the transverse-momentum (pT) range 0.5–11 GeV/c. A centrality-dependent suppression of the ratio of the integrated yields 2ρ(770)0/(π++π−) is observed. The ratio decreases by ∼40% from pp to central Pb-Pb collisions. A study of the pT-differential 2ρ(770)0/(π++π−) ratio reveals that the suppression occurs at low transverse momenta, pT<2 GeV/c. At higher momentum, particle ratios measured in heavy-ion and pp collisions are consistent. The observed suppression is very similar to that previously measured for the K∗(892)0/K ratio and is consistent with EPOS3 predictions that may imply that rescattering in the hadronic phase is a dominant mechanism for the observed suppression.
Collective authorALICE Collaboration
Author S. Acharya
S. Acharya,,
-
, Łukasz Graczykowski (FP / NPD)
Łukasz Graczykowski,,
- Nuclear Physics Division
, 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
, Jeremi Niedziela (FP / NPD)
Jeremi Niedziela,,
- Nuclear Physics Division
, Janusz Oleniacz (FP / NPD)
Janusz Oleniacz,,
- Nuclear Physics Division
, Jan Pluta (FP / NPD)
Jan Pluta,,
- Nuclear Physics Division
, Przemysław Rokita (FEIT / IN)
Przemysław Rokita,,
- The Institute of Computer Science
, Krystian Rosłon (FP / NPD)
Krystian Rosłon,,
- Nuclear Physics Division
et al.`
Total number of authors998
Journal seriesPhysical Review C, ISSN 2469-9985, e-ISSN 2469-9993, [1538-4497]
Issue year2019
Vol99
No6
Pages1-20
Publication size in sheets0.95
ASJC Classification3106 Nuclear and High Energy Physics
DOIDOI:10.1103/PhysRevC.99.064901
URL https://journals.aps.org/prc/abstract/10.1103/PhysRevC.99.064901
Languageen angielski
File
PhysRevC.99.064901.pdf 1.14 MB
Score (nominal)140
Score sourcejournalList
ScoreMinisterial score = 140.0, 17-07-2020, ArticleFromJournal
Publication indicators Scopus Citations = 0; WoS Citations = 0; WoS Impact Factor: 2018 = 3.132 (2) - 2018=3.05 (5)
Citation count*
Cite
Share Share

Get link to the record


* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
Back
Confirmation
Are you sure?