The production of prompt charged particles in proton-lead collisions and in proton-proton collisions at the nucleon-nucleon center-of-mass energy ffiffiffiffiffiffiffiffi sNN p ¼ 5 TeV is studied at LHCb as a function of pseudorapidity (η) and transverse momentum (pT ) with respect to the proton beam direction. The nuclear modification factor for charged particles is determined as a function of η between −4.8 < η < −2.5 (backward region) and 2.0 < η < 4.8 (forward region), and pT between 0.2 < pT < 8.0 GeV=c. The results show a suppression of charged particle production in proton-lead collisions relative to proton-proton collisions in the forward region and an enhancement in the backward region for pT larger than 1.5 GeV=c. This measurement constrains nuclear PDFs and saturation models at previously unexplored values of the parton momentum fraction down to 10−6.

Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2022). Measurement of the Nuclear Modification Factor and Prompt Charged Particle Production in p-Pb and pp Collisions at √sNN=TeV. PHYSICAL REVIEW LETTERS, 128(14) [10.1103/PhysRevLett.128.142004].

Measurement of the Nuclear Modification Factor and Prompt Charged Particle Production in p-Pb and pp Collisions at √sNN=TeV

Calvi, M.;Capelli, S.;Carniti, P.;Fazzini, D.;Garcia Pardinas, J.;Gotti, C.;Martinazzoli, L.;Martinelli, M.;Meloni, S.;Minotti, A.;Petruzzo, M.;Shields, E.  B.;
2022

Abstract

The production of prompt charged particles in proton-lead collisions and in proton-proton collisions at the nucleon-nucleon center-of-mass energy ffiffiffiffiffiffiffiffi sNN p ¼ 5 TeV is studied at LHCb as a function of pseudorapidity (η) and transverse momentum (pT ) with respect to the proton beam direction. The nuclear modification factor for charged particles is determined as a function of η between −4.8 < η < −2.5 (backward region) and 2.0 < η < 4.8 (forward region), and pT between 0.2 < pT < 8.0 GeV=c. The results show a suppression of charged particle production in proton-lead collisions relative to proton-proton collisions in the forward region and an enhancement in the backward region for pT larger than 1.5 GeV=c. This measurement constrains nuclear PDFs and saturation models at previously unexplored values of the parton momentum fraction down to 10−6.
Articolo in rivista - Articolo scientifico
Fragmentation into hadrons; Relativistic heavy-ion collisions;
English
2022
Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2022). Measurement of the Nuclear Modification Factor and Prompt Charged Particle Production in p-Pb and pp Collisions at √sNN=TeV. PHYSICAL REVIEW LETTERS, 128(14) [10.1103/PhysRevLett.128.142004].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/367389
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