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

Relativistic heavy-ion collisions produce a hot and dense thermalized medium,that is expected to emit thermal radiation in form of dileptons. Thesedileptons are not affected by the strong force and are therefore a clean probefor the possible creation of a Quark Gluon Plasma (QGP). However, electroweakdecays of open-charm mesons are expected to induce a substantial background inthe invariant mass region between the $\phi$ and $J/\Psi$ peak ($1\,\text{GeV}\lesssim M_{\ell^+ \ell^-} \lesssim 3 \,\text{GeV}$) of the thermal QGPradiation. To evaluate this background radiation we apply a Langevin approachfor the transport of charm quarks in the UrQMD (hydrodynamics + Boltzmann)hybrid model. Due to the inclusion of event-by-event fluctuations and a full(3+1)-dimensional hydrodynamic evolution, the UrQMD hybrid approach provides amore realistic model for the evolution of the matter produced in heavy ioncollisions as compared to simple homogeneous fireball expansions usuallyemployed before. As drag and diffusion coefficients we use a resonance approachfor elastic heavy-quark scattering and assume a decoupling temperature of thecharm quarks from the hot medium of $130\,\text{MeV}$. For the hadronization ofthe charm quarks we employ a coalescence approach at the decoupling temperaturefrom the medium. In this letter we present our calculations of the D-mesoncorrelations and the invariant mass spectra of the dilepton decays in heavy-ioncollisions at FAIR, RHIC, and LHC energies using different interactionscenarios.

Dileptons from correlated D- and $\bar{\text{D}}$-meson decays in the invariant mass range of the QGP thermal radiation using the UrQMD hybrid model