English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We calculate the polarization of prompt $J/\psi$ production in the improvedcolor evaporation model at leading order employing the $k_T$-factorizationapproach. In this paper, we present the polarization parameter$\lambda_\vartheta$ of prompt $J/\psi$ as a function of transverse momentum in$p+p$ and $p$ + A collisions to compare with data in the helicity,Collins-Soper and Gottfried-Jackson frames. We also present calculations of thecharmonium production cross sections as a function of rapidity and transversemomentum. This is the first $p_T$-dependent calculation of charmoniumpolarization in the improved color evaporation model. We find agreement withboth charmonium cross sections and polarization measurements.

Production and polarization of prompt $J/\psi$ in the improved color evaporation model using the $k_T$-factorization approach