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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Angular correlations between heavy-quarks provide a unique probe of thequark-gluon plasma created in ultra-relativistic heavy-ion collisions. Resultsare presented of a measurement of the azimuthal angle correlations betweenmuons originating from semileptonic decays of heavy-quarks produced in 5.02 TeVPb+Pb and $pp$ collisions at the LHC. The muons are measured with transversemomenta and pseudorapidities satisfying $p_{\mathrm{T}}^\mu > 4$ GeV and$|\eta^\mu|<2.4$, respectively. The distributions of azimuthal angleseparation, $\Delta\phi$, for muon pairs having pseudorapidity separation$|\Delta\eta|>0.8$, are measured in different Pb+Pb centrality intervals andcompared to the same distribution measured in $pp$ collisions at the samecenter-of-mass energy. Results are presented separately for muon pairs withopposite-sign charges, same-sign charges, and all pairs. A clear peak isobserved in all $\Delta\phi$ distributions at $\Delta\phi\sim\pi$, consistentwith the parent heavy-quark pairs being produced via hard-scattering processes.The widths of that peak, characterized using Cauchy-Lorentz fits to the$\Delta\phi$ distributions, are found to not vary significantly as a functionof Pb+Pb collision centrality and are similar for $pp$ and Pb+Pb collisions.This observation will provide important constraints on theoretical descriptionsof heavy-quark interactions with the quark-gluon plasma.

Azimuthal angle correlations of muons produced via heavy-flavor decays in 5.02 TeV Pb+Pb and $pp$ collisions with the ATLAS detector