CMS-PAS-HIN-21-003

CMS-PAS-HIN-21-003
Azimuthal anisotropy of nonprompt D $^{0}$ mesons in PbPb collisions at ${\sqrt {\smash [b]{s_{_{\mathrm {NN}}}}}}=$ 5.02 TeV
CMS Collaboration
April 2022

Abstract: The azimuthal anisotropy elliptic ( $v_2$ ) and triangular ( $v_3$ ) Fourier coefficients of D $^{0}$ mesons produced in B hadron decays are measured in PbPb collisions at ${\sqrt {\smash [b]{s_{_{\mathrm {NN}}}}}}=$ 5.02 TeV. Due to the larger bottom quark mass as compared to the charm quark mass, separate measurements of charm and bottom hadron azimuthal anisotropy can shed new light on understanding the mass dependence of the heavy quark and medium interaction. The results show lower magnitude of $v_2$ and $v_3$ and significantly weaker dependence on transverse momentum and centrality than those found for non-decay D $^{0}$ mesons. A non-zero $v_3$ coefficient of the D $^{0}$ mesons from B decay is observed. Obtained results are in qualitative agreement with theoretical predictions.
Links: CDS record (PDF) ; CADI line (restricted) ; These preliminary results are superseded in this paper, Submitted to PLB. The superseded preliminary plots can be found here.

CMS Publications