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

The interpretation of the J/psi suppression patterns observed in nuclearcollisions, at CERN and RHIC, as a signature of the formation of a deconfinedphase of QCD matter, requires knowing which fractions of the measured J/psiyields, in pp collisions, are due to decays of heavier charmonium states. Froma detailed analysis of the available mid-rapidity charmonium hadro-productioncross sections, or their ratios, we determine that the J/psi feed-downcontributions from psi' and chi_c decays are, respectively, (8.1 +/- 0.3) % and(25 +/- 5) %. These proton-proton values are derived from global averages ofthe proton-nucleus measurements, assuming that the charmonium states areexponentially absorbed with the length of matter they traverse in the nucleartargets.

Study of psi' and chi_c decays as feed-down sources of J/psi hadro-production