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Neutral pion and η meson production in p–Pb collisions at √sNN = 5.02 TeV

Acharya, S.
•
Adamová, D.
•
Adolfsson, J.
altro
Zou, S.
2018
  • journal article

Periodico
THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS
Abstract
Neutral pion and η meson invariant differential yields were measured in non-single diffractive p–Pb colli- sions at √sNN = 5.02 TeV with the ALICE experiment at the CERN LHC. The analysis combines results from three complementary photon measurements, utilizing the PHOS and EMCal calorimeters and the Photon Conversion Method. The invariant differential yields of π0 and η meson inclu- sive production are measured near mid-rapidity in a broad transverse momentum range of 0.3 < pT < 20 GeV/c and 0.7 < pT < 20 GeV/c, respectively. The measured η/π0 ratio increases with pT and saturates for pT > 4 GeV/c at 0.483 ± 0.015stat ± 0.015sys . A deviation from m T scaling is observed for pT < 2 GeV/c. The measured η/π0 ratio is consistent with previous measurements from proton-nucleus and pp collisions over the full pT range. The measured η/π0 ratio at high pT also agrees within uncertainties with measure- ments from nucleus–nucleus collisions. The π 0 and η yields in p–Pb relative to the scaled pp interpolated reference, RpPb, arepresentedfor0.3< pT <20GeV/cand0.7< pT <20 GeV/c, respectively. The results are compared with theoreti- cal model calculations. The values of RpPb are consistent with unity for transverse momenta above 2 GeV/c. These results support the interpretation that the suppressed yield of neutral mesons measured in Pb–Pb collisions at LHC energies is due to parton energy loss in the hot QCD medium.
DOI
10.1140/epjc/s10052-018-6013-8
WOS
WOS:000440762000001
Archivio
http://hdl.handle.net/11368/2928306
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85051224642
https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-018-6013-8
Diritti
open access
license:creative commons
license uri:http://creativecommons.org/licenses/by/4.0/
FVG url
https://arts.units.it/bitstream/11368/2928306/1/EPJC_78(2018)624_1-25.pdf
Soggetti
  • ALICE

  • LHC

Scopus© citazioni
27
Data di acquisizione
Jun 15, 2022
Vedi dettagli
Web of Science© citazioni
27
Data di acquisizione
Mar 27, 2024
Visualizzazioni
1
Data di acquisizione
Apr 19, 2024
Vedi dettagli
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