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Article
Report number arXiv:2007.02208 ; CERN-EP-2020-122
Title Production of ω mesons in pp collisions at s=7TeV
Related titleProduction of ω mesons in pp collisions at s = 7 TeV
Author(s) ALICE Collaboration  显示全部 1027 名作者
Corporate author(s) The ALICE collaboration
Publication 2020
Imprint 01 Jul 2020
Number of pages 16
Note 21 pages, 5 captioned figures, 2 tables, authors from page 16, version published, figures at http://alice-publications.web.cern.ch/node/6646
Published in: Eur. Phys. J. C 80 (2020) 1130
DOI 10.1140/epjc/s10052-020-08651-y
Subject category Nuclear Physics - Experiment ; hep-ex ; Particle Physics - Experiment ; nucl-ex
Accelerator/Facility, Experiment CERN LHC ; ALICE
Keywords QCD ; particle and resonance production ; minimum bias ; experimental results
Abstract The invariant differential cross section of inclusive ω(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 < pT < GeV/c. The ω meson was reconstructed via its ωπ+ππ0 decay channel. The measured ω 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 ω/π0 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 Cω/π0 = 0.67 ± 0.03 (stat) \pm 0.04 (sys) above a transverse momentum of 2.5 GeV/c.
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Copyright/License publication: © 2020-2025 CERN (License: CC-BY-4.0), sponsored by SCOAP³
preprint: © 2020-2025 CERN (License: CC-BY-4.0)
Submitted by david.dobrigkeit.chinellato@cern.ch



 


 记录创建於2020-07-01,最後更新在2025-01-14


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