The first measurement of Phi(1020) meson production in fixed-target pNe collisions at \sqrt{sNN} = 68.5 GeV is presented. The Phi(1020) mesons are reconstructed in their K+K− decay in a data sample consisting of proton collisions on neon nuclei at rest, corresponding to an integrated luminosity of 21.7 \om 1.4 nb-1, collected by the LHCb detector at CERN. The Phi(1020) production cross-section in the centre-of-mass rapidity range of −1.8 < y*< 0 and transverse momentum range of 800 < pT< 6500 MeV/c is found to be sigma = 182.7 \pm 2.7 (stat.) \pm 14.1 (syst) μb/nucleon. A double-differential measurement of the cross-section is also provided in four regions of rapidity and six regions of transverse momentum of the Phi(1020) meson and compared with the predictions from Pythia and EPOS4, which are found to underestimate the experimental values.
Measurement of Phi(1020) meson production in fixed-target pNe collisions at sNN = 68.5 GeV
Bassi G.;Kleijne N.Membro del Collaboration Group
;Morello M. J.Membro del Collaboration Group
;Passaro D.Membro del Collaboration Group
;Pica L.Membro del Collaboration Group
;Riccardi D.Membro del Collaboration Group
;
2025
Abstract
The first measurement of Phi(1020) meson production in fixed-target pNe collisions at \sqrt{sNN} = 68.5 GeV is presented. The Phi(1020) mesons are reconstructed in their K+K− decay in a data sample consisting of proton collisions on neon nuclei at rest, corresponding to an integrated luminosity of 21.7 \om 1.4 nb-1, collected by the LHCb detector at CERN. The Phi(1020) production cross-section in the centre-of-mass rapidity range of −1.8 < y*< 0 and transverse momentum range of 800 < pT< 6500 MeV/c is found to be sigma = 182.7 \pm 2.7 (stat.) \pm 14.1 (syst) μb/nucleon. A double-differential measurement of the cross-section is also provided in four regions of rapidity and six regions of transverse momentum of the Phi(1020) meson and compared with the predictions from Pythia and EPOS4, which are found to underestimate the experimental values.| File | Dimensione | Formato | |
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JHEP03(2025)151.pdf
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