The azimuthal anisotropy coefficient v2 of prompt D0, Dþ, D þ, and Dþ s mesons was measured in midcentral (30%–50% centrality class) Pb-Pb collisions at a center-of-mass energy per nucleon pair ffiffiffiffiffiffiffiffi s NN p ¼ 5.02 TeV, with the ALICE detector at the LHC. The D mesons were reconstructed via their hadronic decays at midrapidity, jyj < 0.8, in the transverse momentum interval 1 < p T < 24 GeV/c. The measured D-meson v2 has similar values as that of charged pions. The Dþ s v2, measured for the first time, is found to be compatible with that of nonstrange D mesons. The measurements are compared with theoretical calculations of charm-quark transport in a hydrodynamically expanding medium and have the potential to constrain medium parameters.
{$D$-meson azimuthal anisotropy in midcentral Pb-Pb collisions at $\mathbf{\sqrt{s_{\rm NN}}=5.02}$ TeV} / The ALICE collaboration, ., Acharya, S., Acosta, F.T.-., Adamová, D., Adolfsson, J., Aggarwal, M.M., Aglieri Rinella, G., Agnello, M., Agrawal, N., Ahammed, Z., Ahn, S.U., Aiola, S., Akindinov, A., Al-Turany, M., Alam, S.N., Albuquerque, D.S.D., Aleksandrov, D., Alessandro, B., Alfaro Molina, R., Ali, Y., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 1092-0145. - 120:10(2018). [10.1103/PhysRevLett.120.102301]
{$D$-meson azimuthal anisotropy in midcentral Pb-Pb collisions at $\mathbf{\sqrt{s_{\rm NN}}=5.02}$ TeV}
L. CunqueiroMembro del Collaboration Group
;
2018
Abstract
The azimuthal anisotropy coefficient v2 of prompt D0, Dþ, D þ, and Dþ s mesons was measured in midcentral (30%–50% centrality class) Pb-Pb collisions at a center-of-mass energy per nucleon pair ffiffiffiffiffiffiffiffi s NN p ¼ 5.02 TeV, with the ALICE detector at the LHC. The D mesons were reconstructed via their hadronic decays at midrapidity, jyj < 0.8, in the transverse momentum interval 1 < p T < 24 GeV/c. The measured D-meson v2 has similar values as that of charged pions. The Dþ s v2, measured for the first time, is found to be compatible with that of nonstrange D mesons. The measurements are compared with theoretical calculations of charm-quark transport in a hydrodynamically expanding medium and have the potential to constrain medium parameters.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
