Nuclear shadowing in DIS at electron-ion colliders

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F20%3A00341573" target="_blank" >RIV/68407700:21340/20:00341573 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1140/epjp/s13360-020-00498-2" target="_blank" >https://doi.org/10.1140/epjp/s13360-020-00498-2</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epjp/s13360-020-00498-2" target="_blank" >10.1140/epjp/s13360-020-00498-2</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Nuclear shadowing in DIS at electron-ion colliders

Popis výsledku v původním jazyce

We present a revision of predictions for nuclear shadowing in deep-inelastic scattering at small Bjorken xBj corresponding to kinematic regions accessible by the future experiments at electron-ion colliders. The nuclear shadowing is treated within the color dipole formalism based on the rigorous Green function technique. This allows incorporating naturally color transparency and coherence length effects, which are not consistently and properly included in present calculations. For the lowest |qq> Fock component of the photon, our calculations are based on an exact numerical solution of the evolution equation for the Green function. Here the magnitude of shadowing is tested using a realistic form for the nuclear density function, as well as various phenomenological models for the dipole cross section. The corresponding variation of the transverse size of the qq photon fluctuations is important for xBj>~10-4, on the contrary with the most of other models, which use frequently only the eikonal approximation with the "frozen" transverse size. At xBj<~0.01 we calculate within the same formalism also a shadowing correction for the higher Fock component of the photon containing gluons. The corresponding magnitudes of gluon shadowing correction are compared adopting different phenomenological dipole models. Our results are tested by available data from the E665 and NMC collaborations. Finally, the magnitude of nuclear shadowing is predicted for various kinematic regions that should be scanned by the future experiments at electron-ion colliders.

Název v anglickém jazyce

Nuclear shadowing in DIS at electron-ion colliders

Popis výsledku anglicky

We present a revision of predictions for nuclear shadowing in deep-inelastic scattering at small Bjorken xBj corresponding to kinematic regions accessible by the future experiments at electron-ion colliders. The nuclear shadowing is treated within the color dipole formalism based on the rigorous Green function technique. This allows incorporating naturally color transparency and coherence length effects, which are not consistently and properly included in present calculations. For the lowest |qq> Fock component of the photon, our calculations are based on an exact numerical solution of the evolution equation for the Green function. Here the magnitude of shadowing is tested using a realistic form for the nuclear density function, as well as various phenomenological models for the dipole cross section. The corresponding variation of the transverse size of the qq photon fluctuations is important for xBj>~10-4, on the contrary with the most of other models, which use frequently only the eikonal approximation with the "frozen" transverse size. At xBj<~0.01 we calculate within the same formalism also a shadowing correction for the higher Fock component of the photon containing gluons. The corresponding magnitudes of gluon shadowing correction are compared adopting different phenomenological dipole models. Our results are tested by available data from the E665 and NMC collaborations. Finally, the magnitude of nuclear shadowing is predicted for various kinematic regions that should be scanned by the future experiments at 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

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

EUROPEAN PHYSICAL JOURNAL PLUS

ISSN

2190-5444

e-ISSN

—

Svazek periodika

135

Číslo periodika v rámci svazku

02 June

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

26

Strana od-do

—

Kód UT WoS článku

000538129500002

EID výsledku v databázi Scopus

2-s2.0-85085880896