Energy dependence of exclusive J/Psi photoproduction in p-Pb interactions at ALICE

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F18%3A00328415" target="_blank" >RIV/68407700:21340/18:00328415 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Energy dependence of exclusive J/Psi photoproduction in p-Pb interactions at ALICE

Popis výsledku v původním jazyce

The electromagnetic field of a fast moving lead ion at the LHC is an intense source of quasi- real photons. This makes it possible to study J/ψ exclusive photoproduction off protons in p–Pb collisions, which is sensitive to the gluon content of the target. Measuring the rapidity of the produced vector meson one can compute the centre-of-mass energy Wγp of the photon–proton scattering. Using LHC Run 1 data, ALICE has measured the cross section for exclusive J/ψ photoproduction in a wide range of scattering angles. In this contribution, we present, for the first time, preliminary measurements of the cross section using the central-barrel detectors of ALICE, as well as cross sections for a novel topology where one of the muons from the decay of the J/ψ is detected with the forward-muon spectrometer and the other muon with the central-barrel detectors. These measurements allow us to study the evolution of the cross section with Wγp in the range from 20 GeV to 700 GeV. The measurements are compared to the newest theoretical models.

Název v anglickém jazyce

Energy dependence of exclusive J/Psi photoproduction in p-Pb interactions at ALICE

Popis výsledku anglicky

The electromagnetic field of a fast moving lead ion at the LHC is an intense source of quasi- real photons. This makes it possible to study J/ψ exclusive photoproduction off protons in p–Pb collisions, which is sensitive to the gluon content of the target. Measuring the rapidity of the produced vector meson one can compute the centre-of-mass energy Wγp of the photon–proton scattering. Using LHC Run 1 data, ALICE has measured the cross section for exclusive J/ψ photoproduction in a wide range of scattering angles. In this contribution, we present, for the first time, preliminary measurements of the cross section using the central-barrel detectors of ALICE, as well as cross sections for a novel topology where one of the muons from the decay of the J/ψ is detected with the forward-muon spectrometer and the other muon with the central-barrel detectors. These measurements allow us to study the evolution of the cross section with Wγp in the range from 20 GeV to 700 GeV. The measurements are compared to the newest theoretical models.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Projekt

<a href="/cs/project/GA18-07880S" target="_blank" >GA18-07880S: Hledání projevů saturace: závislost fotoprodukce částice J/Psi na energii s použitím dat ze srážek proton - olovo na ALICE</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů