Production of ω mesons in pp collisions at √sNN = 7 TeV (CROSBI ID 287092)
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Podaci o odgovornosti
Acharya, S. ; ... ; Antičić, Tome ; ... ; Erhardt, Filip ; ... ; Gotovac, Sven ; ... ; Jerčić, Marko ; ... ; Karatović, David ; ... ; Lončar, Petra ; ... ; Mudnić, Eugen ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; ... ; Simatović, Goran ; ... ; Vicković, Linda ; ... ; Zurlo, N.
ALICE Collaboration
engleski
Production of ω mesons in pp collisions at √sNN = 7 TeV
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 < 17 GeV/c. The ω meson was reconstructed via its ω→π^{; ; ; ; ; +}; ; ; ; ; π^{; ; ; ; ; -}; ; ; ; ; π0 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 C^{; ; ; ; ; ω/ π0}; ; ; ; ; = 0.67 ± 0.03 ~ (stat)~ ± 0.04 ~(sys)~ above a transverse momentum of 2.5GeV/c.
omega meson ; invariant differential cross section ; PYTHIA ;
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Podaci o izdanju
80 (12)
2020.
1130
16
objavljeno
1434-6044
1434-6052
10.1140/epjc/s10052-020-08651-y
Povezanost rada
Fizika