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Constraining Gluon Distributions in Nuclei Using Dijets in Proton-Proton and Proton-Lead Collisions at √sNN=5.02 TeV (CROSBI ID 266969)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

(CMS Collaboration) Sirunyan, Albert ; ... ; Đurić, Senka ; Lelas, Damir ; Godinović, Nikola ; Puljak, Ivica ; Šćulac, Toni ; Mesić, Benjamin ; Šuša, Tatjana ; Kovač, Marko et al. Constraining Gluon Distributions in Nuclei Using Dijets in Proton-Proton and Proton-Lead Collisions at √sNN=5.02 TeV // Physical review letters, 121 (2018), 062002, 18. doi: 10.1103/PhysRevLett.121.062002

Podaci o odgovornosti

Sirunyan, Albert ; ... ; Đurić, Senka ; Lelas, Damir ; Godinović, Nikola ; Puljak, Ivica ; Šćulac, Toni ; Mesić, Benjamin ; Šuša, Tatjana ; Kovač, Marko ; Ferenček, Dinko ; Antunović, Željko ; Starodumov, Andrey ; Brigljević, Vuko ; Luetić, Jelena ; Kadija, Krešo ; ... ; Woods, Nate

CMS Collaboration

engleski

Constraining Gluon Distributions in Nuclei Using Dijets in Proton-Proton and Proton-Lead Collisions at √sNN=5.02 TeV

The pseudorapidity distributions of dijets as functions of their average transverse momentum (paveT) aremeasured in proton-lead (pPb) and proton-proton (pp) collisions. The data samples were collected by theCMS experiment at the CERN LHC, at a nucleon-nucleon center-of-mass energy of 5.02 TeV. A significantmodification of thepPb spectra with respect to theppspectra is observed in allpaveTintervals investigated.The ratios of thepPb andppdistributions are compared to next-to-leading order perturbative quantumchromodynamics calculations with unbound nucleon and nuclear parton distribution functions (PDFs).These results give the first evidence that the gluon PDF at large Bjorkenxin lead ions is stronglysuppressed with respect to the PDF in unbound nucleons

High energy physics ; Experimental particle physics ; LHC ; CMS ; Standard Model

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Podaci o izdanju

121

2018.

062002

18

objavljeno

0031-9007

1079-7114

10.1103/PhysRevLett.121.062002

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Fizika

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