The p(T)-differential cross section of omega meson production in pp collisions at root s = 13 TeV at midrapidity (vertical bar y vertical bar < 0.5) was measured with the ALICE detector at the LHC, covering an unprecedented transverse-momentum range of 1.6 < p(T)< 50 GeV/c. The meson is reconstructed via the omega -> pi(+)pi(-)pi(0) decay channel. The results are compared with various theoretical calculations: PYTHIA8.2 with the Monash 2013 tune overestimates the data by up to 50%, whereas good agreement is observed with Next-to-Leading Order (NLO) calculations incorporating omega fragmentation using a broken SU(3) model. The omega/pi(0) ratio is presented and compared with theoretical calculations and the available measurements at lower collision energies. The presented data triples the p(T) ranges of previously available measurements. A constant ratio of C-omega/pi 0 = 0.578 +/- 0.006 (stat.) +/- 0.013 (syst.) is found above a transverse momentum of 4 GeV/c, which is in agreement with previous findings at lower collision energies within the systematic and statistical uncertainties.
Measurement of ω meson production in pp collisions at √s=13 TeV
De Falco, A.;Fionda, F. M.;Usai, G. L.;
2025-01-01
Abstract
The p(T)-differential cross section of omega meson production in pp collisions at root s = 13 TeV at midrapidity (vertical bar y vertical bar < 0.5) was measured with the ALICE detector at the LHC, covering an unprecedented transverse-momentum range of 1.6 < p(T)< 50 GeV/c. The meson is reconstructed via the omega -> pi(+)pi(-)pi(0) decay channel. The results are compared with various theoretical calculations: PYTHIA8.2 with the Monash 2013 tune overestimates the data by up to 50%, whereas good agreement is observed with Next-to-Leading Order (NLO) calculations incorporating omega fragmentation using a broken SU(3) model. The omega/pi(0) ratio is presented and compared with theoretical calculations and the available measurements at lower collision energies. The presented data triples the p(T) ranges of previously available measurements. A constant ratio of C-omega/pi 0 = 0.578 +/- 0.006 (stat.) +/- 0.013 (syst.) is found above a transverse momentum of 4 GeV/c, which is in agreement with previous findings at lower collision energies within the systematic and statistical uncertainties.I metadati presenti in IRIS UNICA sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono protetti da diritto d'autore, salvo diversa indicazione.



