Production of omega mesons in pp collisions at s=7 TeV


Acharya S., Adamova D., Adler A., Adolfsson J., Aggarwal M. M., Rinella G. A., ...More

EUROPEAN PHYSICAL JOURNAL C, vol.80, no.12, 2020 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 80 Issue: 12
  • Publication Date: 2020
  • Doi Number: 10.1140/epjc/s10052-020-08651-y
  • Journal Name: EUROPEAN PHYSICAL JOURNAL C
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Communication Abstracts, INSPEC, zbMATH, Directory of Open Access Journals
  • Bursa Uludag University Affiliated: No

Abstract

The invariant differential cross section of inclusive omega (782) meson production at midrapidity (|y|<0.5) in pp collisions at s=7 TeV was measured with the ALICE detector at the LHC over a transverse momentum range of 2 pi+pi-pi 0 decay channel. The measured omega production cross section is compared to various calculations: PYTHIA 8.2 Monash 2013 describes the data, while PYTHIA 8.2 Tune 4C overestimates the data by about 50%. A recent NLO calculation, which includes a model describing the fragmentation of the whole vector-meson nonet, describes the data within uncertainties below 6 GeV/c, while it overestimates the data by up to 50% for higher pT. The omega/pi 0 ratio is in agreement with previous measurements at lower collision energies and the PYTHIA calculations. In addition, the measurement is compatible with transverse mass scaling within the measured pT range and the ratio is constant with C omega/pi 0=0.67 +/- 0.03(stat) +/- 0.04(sys) above a transverse momentum of 2.5 GeV/c.