كواركات ثقيلة في كرة نارية سريع

الملخص الأصلي

كما كتبه المؤلفون، بالإنجليزية arXiv:2602.14221

The azimuthal anisotropy of prompt D$$^\pm_\mathrm{s}$$ mesons produced in lead-lead (PbPb) collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV is measured using data obtained with the CMS detector. The dataset corresponds to an integrated luminosity of 0.58 nb$$^{-1}$$. The azimuthal anisotropy of heavy charmed mesons provides a key constraint on the interactions of charm quarks with the quark-gluon plasma (QGP) medium. These interactions include coalescence mechanisms and parton energy loss in the QGP. The anisotropy is quantified by the second- ($$v_2$$) and third-order ($$v_3$$) Fourier coefficients of the azimuthal distribution of the D$$^\pm_\mathrm{s}$$ mesons. The $$v_2$$ coefficient is determined in the transverse momentum range 4 $$\lt$$ $$p_\mathrm{T}$$ $$\lt$$ 40 GeV for three event centrality classes, while the $$v_3$$ coefficient is measured in the range 4 $$\lt$$ $$p_\mathrm{T}$$ $$\lt$$ 20 GeV for a single event centrality class. The results for the D$$^\pm_\mathrm{s}$$ mesons are compared to those previously measured for D$$^0$$ mesons. The azimuthal anisotropy coefficients for D$$^\pm_\mathrm{s}$$ and D$$^0$$ mesons are found to be consistent within the precision of this measurement, suggesting that the strangeness content of the D$$^\pm_\mathrm{s}$$ meson does not significantly alter its azimuthal distribution within the measured $$p_\mathrm{T}$$ range.