Coherent photo- and electroproduction of charmonia on nuclear targets revisited: Green function formalism

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F24%3A00376911" target="_blank" >RIV/68407700:21340/24:00376911 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevD.110.054015" target="_blank" >https://doi.org/10.1103/PhysRevD.110.054015</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevD.110.054015" target="_blank" >10.1103/PhysRevD.110.054015</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Coherent photo- and electroproduction of charmonia on nuclear targets revisited: Green function formalism

Popis výsledku v původním jazyce

We study for the first time the production of charmonia in nuclear ultra-peripheral and electron-ion collisions based on a rigorous Green function formalism. Such formalism allows to incorporate properly formation effects (color transparency), as well as the quantum coherence inherent in higher twist shadowing corrections related to the $|Qbar Qra$ Fock component of the photon. The leading twist gluon shadowing effect associated with multi-gluon photon fluctuations is also included within the same formalism. The later effect represents the dominant source of shadowing at mid rapidities in the LHC kinematic region, while the reduced effect of quark shadowing leads to a significant modification of differential cross sections $dsigma/dy$ at forward and/or backwards rapidities. Model calculations for $dsigma/dy$ are in a good agreement with available UPC data on coherent charmonium production at RHIC and the LHC. In addition, we also perform predictions for nuclear effects in the electroproduction of charmonia, which can be verified by new data from electron-ion colliders.

Název v anglickém jazyce

Coherent photo- and electroproduction of charmonia on nuclear targets revisited: Green function formalism

Popis výsledku anglicky

We study for the first time the production of charmonia in nuclear ultra-peripheral and electron-ion collisions based on a rigorous Green function formalism. Such formalism allows to incorporate properly formation effects (color transparency), as well as the quantum coherence inherent in higher twist shadowing corrections related to the $|Qbar Qra$ Fock component of the photon. The leading twist gluon shadowing effect associated with multi-gluon photon fluctuations is also included within the same formalism. The later effect represents the dominant source of shadowing at mid rapidities in the LHC kinematic region, while the reduced effect of quark shadowing leads to a significant modification of differential cross sections $dsigma/dy$ at forward and/or backwards rapidities. Model calculations for $dsigma/dy$ are in a good agreement with available UPC data on coherent charmonium production at RHIC and the LHC. In addition, we also perform predictions for nuclear effects in the electroproduction of charmonia, which can be verified by new data from electron-ion colliders.

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/EF20_079%2F0017983" target="_blank" >EF20_079/0017983: Mobility ČVUT MSCA-IF-IV-v-79</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

PHYSICAL REVIEW D

ISSN

2470-0010

e-ISSN

2470-0029

Svazek periodika

110

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

15

Strana od-do

1-15

Kód UT WoS článku

001317467400003

EID výsledku v databázi Scopus

2-s2.0-85204466742