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

0538376 - ÚJF 2021 RIV US eng J - Článek v odborném periodiku
Acharya, S. - Adamová, Dagmar - Bielčík, J. - Bielčíková, Jana - Broz, M. - Contreras, J. G. - Herman, T. - Horák, D. - Isakov, Artem - Křížek, Filip - Křížková Gajdošová, K. - Kushpil, Svetlana - Lavička, R. - Mareš, Jiří A. - Petráček, V. - Šafařík, K. - Šumbera, Michal - Závada, Petr … celkem 1007 autorů
Production of omega mesons in pp collisions at root s=7 TeV.
European Physical Journal C. Roč. 80, č. 12 (2020), č. článku 1130. ISSN 1434-6044. E-ISSN 1434-6052
Grant CEP: GA MŠMT(CZ) LTT17018; GA MŠMT(CZ) LM2018104
Institucionální podpora: RVO:68378271 ; RVO:61389005
Klíčová slova: ALICE collaboration * heavy ion collisions
Obor OECD: Nuclear physics; Particles and field physics (FZU-D)
Impakt faktor: 4.590, rok: 2020
Způsob publikování: Open access
https://doi.org/10.1140/epjc/s10052-020-08651-y

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<pT<17 GeV/c. The omega meson was reconstructed via its omega -> 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.
Trvalý link: http://hdl.handle.net/11104/0316187