2018/05/31 by A. M. Sirunyan, CMS Collaboration, A. Tumasyan +98 · 1 citation
Physics and Astronomy · #Charged particle #Glauber #Gluon #High-Energy Particle Collisions Research #Ion #Large Hadron Collider #Nuclear physics #Nucleon #Particle physics #Particle physics theoretical and experimental studies #Parton #Physics #Proton #Pseudorapidity #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Quark–gluon plasma #Scattering #Spectral line #hep-ex #nucl-ex
paper · pdf · doi:10.1103/physrevlett.121.062002
published as Phys. Rev. Lett. 121, 062002 (2018) · Replaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/HIN-16-003 (CMS Public Pages)
openalex created_date 2018/06/01 · openalex publication_date 2018/08/07 · arxiv created 2018/08/08 · arxiv updated 2018/08/15 · openalex updated_date 2026/08/06
The pseudorapidity distributions of dijets as functions of their average transverse momentum (pTave) are measured in proton-lead (pPb) and proton-proton (pp) collisions. The data samples were collected by the CMS experiment at the CERN LHC, at a nucleon-nucleon center-of-mass energy of 5.02 TeV. A significant modification of the pPb spectra with respect to the pp spectra is observed in all pTave intervals investigated. The ratios of the pPb and pp distributions are compared to next-to-leading order perturbative quantum chromodynamics calculations with unbound nucleon and nuclear parton distribution functions (PDFs). These results give the first evidence that the gluon PDF at large Bjorken x in lead ions is strongly suppressed with respect to the PDF in unbound nucleons.