The production of prompt charged particles in proton-lead collisions and in proton-proton collisions at the nucleon-nucleon center-of-mass energy √s_NN = 5 TeV is studied at LHCb as a function of pseudorapidity (η) and transverse momentum (p_T) 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 p_T between 0.2 < p_T < 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 p_T 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 p p Collisions at √s_NN = 5 TeV. PHYSICAL REVIEW LETTERS, 128(14), 1-12 [10.1103/PhysRevLett.128.142004].

Measurement of the Nuclear Modification Factor and Prompt Charged Particle Production in p Pb and p p Collisions at √s_NN = 5 TeV

Capriotti, L.;Carbone, A.;Ferrari, F.;Galli, D.;Maccolini, S.;Manuzzi, D.;Patrignani, C.;Villa, A.;Zucchelli, S.;
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 √s_NN = 5 TeV is studied at LHCb as a function of pseudorapidity (η) and transverse momentum (p_T) 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 p_T between 0.2 < p_T < 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 p_T 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.
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 p p Collisions at √s_NN = 5 TeV. PHYSICAL REVIEW LETTERS, 128(14), 1-12 [10.1103/PhysRevLett.128.142004].
Aaij, R.; Abellán Beteta, C.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Aidala, C.A.; Aiola, S.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; A...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/900390
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