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π0 and η meson production in proton-proton collisions at √s = 8 TeV

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

Periodico
THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS
Abstract
An invariant differential cross section measure- ment of inclusive π 0 and η meson production at mid-rapidity in pp collisions at √s = 8 TeV was carried out by the ALICE experiment at the LHC. The spectra of π0 and η mesons were measured in transverse momentum ranges of 0.3 < pT < 35GeV/cand0.5 < pT < 35GeV/c, respectively. Next-to-leading order perturbative QCD cal- culations using fragmentation functions DSS14 for the π0 and AESSS for the η overestimate the cross sections of both neutral mesons, although such calculations agree with the measured η/π0 ratio within uncertainties. The results were also compared with PYTHIA 8.2 predictions for which the Monash 2013 tune yields the best agreement with the mea- sured neutral meson spectra. The measurements confirm a universal behavior of the η/π 0 ratio seen for NA27, PHENIX and ALICE data for pp collisions from √s = 27.5 GeV to √s = 8 TeV within experimental uncertainties. A rela- tion between the π0 and η production cross sections for pp collisions at √s = 8 TeV is given by m T scaling for pT > 3.5 GeV/c. However, a deviation from this empir- ical scaling rule is observed for transverse momenta below p T < 3.5 GeV/c in the η/π 0 ratio with a significance of 6.2σ .
DOI
10.1140/epjc/s10052-018-5612-8
WOS
WOS:000428848200002
Archivio
http://hdl.handle.net/11368/2925146
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85044517372
https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-018-5612-8
Diritti
open access
license:creative commons
license uri:http://creativecommons.org/licenses/by/4.0/
FVG url
https://arts.units.it/bitstream/11368/2925146/1/EPJ_C78(2018)263_1-26.pdf
Soggetti
  • Physics and Astronomy...

  • ALICE

  • LHC

Scopus© citazioni
34
Data di acquisizione
Jun 14, 2022
Vedi dettagli
Web of Science© citazioni
34
Data di acquisizione
Mar 13, 2024
Visualizzazioni
2
Data di acquisizione
Apr 19, 2024
Vedi dettagli
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