Nuclear modification factor of light neutral-meson spectra up to high transverse momentum in p–Pb collisions at √sNN = 8.16 TeV
ALICE Collaboration. (2022). Nuclear modification factor of light neutral-meson spectra up to high transverse momentum in p–Pb collisions at √sNN = 8.16 TeV. Physics Letters B, 827, Article 136943. https://doi.org/10.1016/j.physletb.2022.136943
Published inPhysics Letters B
© 2022 European Organization for Nuclear Research. Published by Elsevier B.V. Funded by SCOAP3.
Neutral pion (π0) and η meson production cross sections were measured up to unprecedentedly high transverse momenta (pT) in p–Pb collisions at √sNN=8.16TeV. The mesons were reconstructed via their two-photon decay channel in the rapidity interval −1.3<0.3 in the ranges of 0.4<200 GeV/c and 1.0<50 GeV/c, respectively. The respective nuclear modification factor (RpPb) is presented for pT up to of 200 and 30 GeV/c, where the former was achieved by extending the π0 measurement in pp collisions at √s=8TeV using the merged cluster technique. The values of RpPb are below unity for pT<10 GeV/c, while they are consistent with unity for pT>10 GeV/c, leaving essentially no room for final state energy loss. The new data provide strong constraints for nuclear parton distribution and fragmentation functions over a broad kinematic range and are compared to model predictions as well as previous results at √sNN=5.02TeV.
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