Energy dependence of coherent photonuclear production of J/ψ mesons in ultra-peripheral Pb-Pb collisions at √sNN=5.02 TeV
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F23%3A00582214" target="_blank" >RIV/61389005:_____/23:00582214 - isvavai.cz</a>
Nalezeny alternativní kódy
RIV/68378271:_____/23:00582214
Výsledek na webu
<a href="https://doi.org/10.1007/JHEP10(2023)119" target="_blank" >https://doi.org/10.1007/JHEP10(2023)119</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/JHEP10(2023)119" target="_blank" >10.1007/JHEP10(2023)119</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Energy dependence of coherent photonuclear production of J/ψ mesons in ultra-peripheral Pb-Pb collisions at √sNN=5.02 TeV
Popis výsledku v původním jazyce
The cross section for coherent photonuclear production of J/psi is presented as a function of the electromagnetic dissociation (EMD) of Pb. The measurement is performed with the ALICE detector in ultra-peripheral Pb-Pb collisions at a centre-of-mass energy per nucleon pair of root s(NN) = 5.02 TeV. Cross sections are presented in five different J/psi rapidity ranges within |y| < 4, with the J/psi reconstructed via its dilepton decay channels. In some events the J/psi is not accompanied by EMD, while other events do produce neutrons from EMD at beam rapidities either in one or the other beam direction, or in both. The cross sections in a given rapidity range and for different configurations of neutrons from EMD allow for the extraction of the energy dependence of this process in the range 17 < W-gamma Pb,W-n < 920 GeV, where W-gamma Pb,W-n is the centre-of-mass energy per nucleon of the gamma Pb system. This range corresponds to a Bjorken-x interval spanning about three orders of magnitude: 1.1 x 10(-5) < x < 3.3 x 10(-2). In addition to the ultra-peripheral and photonuclear cross sections, the nuclear suppression factor is obtained. These measurements point to a strong depletion of the gluon distribution in Pb nuclei over a broad, previously unexplored, energy range. These results, together with previous ALICE measurements, provide unprecedented information to probe quantum chromodynamics at high energies.
Název v anglickém jazyce
Energy dependence of coherent photonuclear production of J/ψ mesons in ultra-peripheral Pb-Pb collisions at √sNN=5.02 TeV
Popis výsledku anglicky
The cross section for coherent photonuclear production of J/psi is presented as a function of the electromagnetic dissociation (EMD) of Pb. The measurement is performed with the ALICE detector in ultra-peripheral Pb-Pb collisions at a centre-of-mass energy per nucleon pair of root s(NN) = 5.02 TeV. Cross sections are presented in five different J/psi rapidity ranges within |y| < 4, with the J/psi reconstructed via its dilepton decay channels. In some events the J/psi is not accompanied by EMD, while other events do produce neutrons from EMD at beam rapidities either in one or the other beam direction, or in both. The cross sections in a given rapidity range and for different configurations of neutrons from EMD allow for the extraction of the energy dependence of this process in the range 17 < W-gamma Pb,W-n < 920 GeV, where W-gamma Pb,W-n is the centre-of-mass energy per nucleon of the gamma Pb system. This range corresponds to a Bjorken-x interval spanning about three orders of magnitude: 1.1 x 10(-5) < x < 3.3 x 10(-2). In addition to the ultra-peripheral and photonuclear cross sections, the nuclear suppression factor is obtained. These measurements point to a strong depletion of the gluon distribution in Pb nuclei over a broad, previously unexplored, energy range. These results, together with previous ALICE measurements, provide unprecedented information to probe quantum chromodynamics at high energies.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10304 - Nuclear physics
Návaznosti výsledku
Projekt
—
Návaznosti
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2023
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Journal of High Energy Physics
ISSN
1029-8479
e-ISSN
1029-8479
Svazek periodika
2023
Číslo periodika v rámci svazku
10
Stát vydavatele periodika
US - Spojené státy americké
Počet stran výsledku
41
Strana od-do
119
Kód UT WoS článku
001093240400001
EID výsledku v databázi Scopus
2-s2.0-85175831207