Zobrazeno 1 - 10
of 248
pro vyhledávání: '"Nemchik, J"'
Autor:
Óbertová, J., Nemchik, J.
We present for the first time a revised study of charmonium production in nuclear ultra-peripheral collisions (UPC) based on a rigorous Green function formalism. This formalism allows for the proper incorporation of the effects of color transparency,
Externí odkaz:
http://arxiv.org/abs/2410.01668
Autor:
Nemchik, J., Óbertová, J.
Publikováno v:
Phys. Rev. D. 110, 054015 (2024)
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 wel
Externí odkaz:
http://arxiv.org/abs/2407.02219
Autor:
Kopeliovich, B. Z., Nemchik, J.
Data on high-$p_T$ hadron production in heavy ion collisions at Feynman $x_F=0$ indicate at universality of the observed nuclear suppression. Our analysis of the production mechanisms demonstrates important role of the color transparency effects whic
Externí odkaz:
http://arxiv.org/abs/2406.03755
Heavy and light quarks produced in high-$p_T$ partonic collisions radiate differently. Heavy quarks regenerate their color field, stripped-off in the hard reaction, much faster than the light ones and radiate a significantly smaller fraction of the i
Externí odkaz:
http://arxiv.org/abs/2307.15687
Autor:
Nemchik, J., Kopeliovich, B. Z.
Coherent photoproduction of heavy quarkonia on nuclear targets is studied within the QCD color dipole formalism including several main phenomena: i) The correlation between impact parameter of a collision $\vec b$ and dipole orientation $\vec r$; ii)
Externí odkaz:
http://arxiv.org/abs/2211.16271
Publikováno v:
Phys.Rev. D105, 054023 (2022)
The differential cross section of coherent photo-production of heavy quarkonia on nuclear targets is calculated within the QCD color dipole formalism. The higher-twist nuclear shadowing corresponding to the $\bar QQ$ Fock component of the photon, is
Externí odkaz:
http://arxiv.org/abs/2201.13021
Autor:
Krelina, M., Nemchik, J.
We investigate the momentum transfer dependence of differential cross sections $d\sigma/dt$ in diffractive electroproduction of heavy quarkonia on proton targets. Model predictions for $d\sigma/dt$ within the light-front QCD dipole formalism are base
Externí odkaz:
http://arxiv.org/abs/2107.13815
Publikováno v:
Phys. Rev. D 103, 094027 (2021)
The differential cross section $d\sigma/dq^2$ of diffractive electroproduction of heavy quarkonia on protons is a sensitive study tool for the interaction dynamics within the dipole representation. Knowledge of the transverse momentum transfer $\vec
Externí odkaz:
http://arxiv.org/abs/2102.06106
Heavy quarkonium production in ultra-peripheral nuclear collisions (UPC) is described within the QCD dipole formalism. Realistic quarkonium wave functions in the $Q\bar Q$ rest frame are calculated by solving the Schr\"odinger equation with a subsequ
Externí odkaz:
http://arxiv.org/abs/2008.05116
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