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

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

Dettagli Bibliografici
Parent link:Physical Review Letters: Scientific Journal.— , 1958-
Vol. 121, iss. 6.— 2018.— [062002, 18 p.]
Enti autori: Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов, Национальный исследовательский Томский политехнический университет Инженерная школа новых производственных технологий Научно-производственная лаборатория "Импульсно-пучковых, электроразрядных и плазменных технологий"
Altri autori: Sirunyan A. M., Tumasyan A. R., Adam W. Wolfgang, Ambrogi F. Federico, Babaev A. A. Anton Anatoljevich, Okhotnikov V. V. Vitaly Vladimirovich
Riassunto:Title screen
The pseudorapidity distributions of dijets as functions of their average transverse momentum (paveT) 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 paveT 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.
Режим доступа: по договору с организацией-держателем ресурса
Lingua:inglese
Pubblicazione: 2018
Soggetti:
электронный ресурс
труды учёных ТПУ
фотоны
протоны
Accesso online:https://doi.org/10.1103/PhysRevLett.121.062002
Natura: Elettronico Capitolo di libro
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=658858
Descrizione
Riassunto:Title screen
The pseudorapidity distributions of dijets as functions of their average transverse momentum (paveT) 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 paveT 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.
Режим доступа: по договору с организацией-держателем ресурса
DOI:10.1103/PhysRevLett.121.062002

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