The production of prompt charged particles in proton-lead collisions and in proton-proton collisions at the nucleon-nucleon center-of-mass energy √ s N N = 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 .

Measurement of the nuclear modification factor and prompt charged particle production in p-Pb and pp collisions at sNN =5 TeV / Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Aidala, C.A., Aiola, S., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Aliouche, Z., Alkhazov, G., Alvarez Cartelle, P., Amato, S., Amey, J.L., Amhis, Y., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 128:14(2022). [10.1103/PhysRevLett.128.142004]

Measurement of the nuclear modification factor and prompt charged particle production in p-Pb and pp collisions at sNN =5 TeV

Casse, G.;Sarti, A.;
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 N N = 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
Forward physics, Hadron-Hadron scattering (experiments), Minimum bias, Particle and resonance production, QCD
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of the nuclear modification factor and prompt charged particle production in p-Pb and pp collisions at sNN =5 TeV / Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Aidala, C.A., Aiola, S., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Aliouche, Z., Alkhazov, G., Alvarez Cartelle, P., Amato, S., Amey, J.L., Amhis, Y., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 128:14(2022). [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/11573/1673238
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