Incoherent J/ψ production at large | t | identifies the onset of saturation at the LHC

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F24%3A00377126" target="_blank" >RIV/68407700:21340/24:00377126 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.physletb.2024.138613" target="_blank" >https://doi.org/10.1016/j.physletb.2024.138613</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2024.138613" target="_blank" >10.1016/j.physletb.2024.138613</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Incoherent J/ψ production at large | t | identifies the onset of saturation at the LHC

Popis výsledku v původním jazyce

We predict that the onset of gluon saturation can be uniquely identified using incoherent J/g/ production in Pb-Pb collisions at currently accessible energies of the LHC. The diffractive incoherent photo -production of a J/g/ vector meson off a hadron provides information on the partonic structure of the hadron. Within the GoodWalker approach it specifically measures the variance over possible target configurations of the hadronic colour field. For this process then, gluon saturation sets in when the cross section reaches a maximum, as a function of the centre -of -mass energy of the photon-hadron system (W), and then decreases. We benchmark the energydependent hot -spot model against data from HERA and the LHC and demonstrate a good description of the available data. We show that the study of the energy dependence of the incoherent production of J/g/ allows us to pinpoint the onset of saturation effects by selecting the region of Mandelstam-t around 1 GeV 2 where the contribution of hot spots is dominant. We predict the onset of saturation in a Pb target to occur for W around a few hundred GeV. This can be measured with current data in ultra -peripheral Pb-Pb collisions at the LHC.

Název v anglickém jazyce

Incoherent J/ψ production at large | t | identifies the onset of saturation at the LHC

Popis výsledku anglicky

We predict that the onset of gluon saturation can be uniquely identified using incoherent J/g/ production in Pb-Pb collisions at currently accessible energies of the LHC. The diffractive incoherent photo -production of a J/g/ vector meson off a hadron provides information on the partonic structure of the hadron. Within the GoodWalker approach it specifically measures the variance over possible target configurations of the hadronic colour field. For this process then, gluon saturation sets in when the cross section reaches a maximum, as a function of the centre -of -mass energy of the photon-hadron system (W), and then decreases. We benchmark the energydependent hot -spot model against data from HERA and the LHC and demonstrate a good description of the available data. We show that the study of the energy dependence of the incoherent production of J/g/ allows us to pinpoint the onset of saturation effects by selecting the region of Mandelstam-t around 1 GeV 2 where the contribution of hot spots is dominant. We predict the onset of saturation in a Pb target to occur for W around a few hundred GeV. This can be measured with current data in ultra -peripheral Pb-Pb collisions at the LHC.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

<a href="/cs/project/GA22-27262S" target="_blank" >GA22-27262S: Projevy saturace s novou úrovní přesnosti pro budoucí elektron-iontové urychlovače</a><br>

Návaznosti

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

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Physics Letters B

ISSN

0370-2693

e-ISSN

1873-2445

Svazek periodika

852

Číslo periodika v rámci svazku

May

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

6

Strana od-do

—

Kód UT WoS článku

001224333800001

EID výsledku v databázi Scopus

2-s2.0-85189505229