Gluon shadowing at small x from coherent J/psi photoproduction data at energies available at the CERN Large Hadron Collider

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F17%3A00318515" target="_blank" >RIV/68407700:21340/17:00318515 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1103/PhysRevC.96.015203" target="_blank" >http://dx.doi.org/10.1103/PhysRevC.96.015203</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevC.96.015203" target="_blank" >10.1103/PhysRevC.96.015203</a>

Result language
angličtina
Original language name
Gluon shadowing at small x from coherent J/psi photoproduction data at energies available at the CERN Large Hadron Collider
Original language description
The cross section for coherent J/psi photoproduction in Pb-Pb collisions is the sum of two contributions: one from low-energy and the other from high-energy photon-nucleus interactions. A novel method to disentangle the two contributions, allowing one to extract the coherent photo-nuclear cross section for coherent J/psi production, sigma(gamma).(Pb) , is presented. The utility of the method is demonstrated using measurements from peripheral and ultraperipheral Pb-Pb collisions at the CERN Large Hadron Collider. Applying the proposed method to the available data, it is possible to obtain sigma(gamma).(Pb) up to a photon-lead center-of-mass energy of 470 GeV, which corresponds to x of 4.4 x 10(-5). To illustrate a possible use of the extracted photonuclear cross sections, the corresponding nuclear suppression factors are computed and they are compared to predictions of gluon shadowing calculated in the leading-twist approximation approach.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Project
<a href="/en/project/LG15052" target="_blank" >LG15052: Investigation of the Microworld using the CERN Infrastructure</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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