RT Journal Article
T1 Measurement of the Nuclear Modification Factor and Prompt Charged Particle Production in p-Pb and pp Collisions at SQRT(SNN) =5 TeV
A1 Gallas Torreira, Abraham
A1 Aaij, Roel
A1 Abellán Beteta, Carlos
A1 Ackerley, Tom
A1 Adeva Andany, Bernardo
A1 Adinolfi, Marco
A1 Afsharnia, Hossein
A1 Aidala, Christine
A1 Aiola, Simone
A1 Ajaltouni, Ziad
K1 Fragmentation into hadrons
K1 Relativistic heavy-ion collisions
K1 Hadrons
K1 Hadron colliders
K1 Particle production
AB The production of prompt charged particles in proton–lead collisions and in proton–proton collisions at the nucleon–nucleon center-of-mass energy SQRT(sNN) = 5 TeV is studied at LHCb as a function of pseudorapidity (eta) and transverse momentum (pT) with respect to the proton beam direction. The nuclear modification factor for charged particles is determined as a function of eta between -4.8 < eta < -2.5 (backward region) and 2.0 < eta < 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.
PB American Physical Society
SN 0031-9007
YR 2022
FD 2022-04-07
LK https://hdl.handle.net/10347/44778
UL https://hdl.handle.net/10347/44778
LA eng
NO R. Aaij et al. Phys. Rev. Lett. 128, 142004
NO We acknowledge support from CERN and from the national agencies: CAPES, CNPq, FAPERJ and FINEP (Brazil); MOST and NSFC (China); CNRS/ IN2P3 (France); BMBF, DFG and MPG (Germany); INFN (Italy); NWO (Netherlands); MNiSW and NCN (Poland); MEN/IFA (Romania); MSHE (Russia); MICINN (Spain); SNSF and SER (Switzerland); NASU (Ukraine); STFC (United Kingdom); DOE NP and NSF (USA). We acknowledge the computing resources that are provided by CERN, IN2P3 (France), KIT, and DESY (Germany), INFN (Italy), SURF (Netherlands), PIC (Spain), GridPP (United Kingdom), RRCKI and Yandex LLC (Russia), CSCS (Switzerland), IFIN-HH (Romania), CBPF (Brazil), PL-GRID (Poland) and OSC (USA).We are indebted to the communities behind the multiple open-source software packages on which we depend. Individual groups or members have received support from AvH Foundation (Germany); EPLANET, Marie Skłodowska-Curie Actions and ERC (European Union); A*MIDEX, ANR, Labex P2IO and OCEVU, and R´egion Auvergne-Rhône-Alpes (France); Key Research Program of Frontier Sciences of CAS, CAS PIFI, Thousand Talents Program, and Sci. & Tech. Program of Guangzhou (China); RFBR, RSF and Yandex LLC (Russia); GVA, XuntaGal and GENCAT (Spain); the Royal Society and the Leverhulme Trust (United Kingdom).
DS Minerva
RD 25 abr 2026