The elliptic and triangular flow coefficients and of prompt , , and mesons were measured at midrapidity ( ) in Pb–Pb collisions at the centre-of-mass energy per nucleon pair of with the ALICE detector at the LHC. The D mesons were reconstructed via their hadronic decays in the transverse momentum interval in central (0–10%) and semi-central (30–50%) collisions. Compared to pions, protons, and mesons, the average D-meson harmonics are compatible within uncertainties with a mass hierarchy for , and are similar to those of charged pions for higher . The coupling of the charm quark to the light quarks in the underlying medium is further investigated with the application of the event-shape engineering (ESE) technique to the D-meson and -differential yields. The D-meson is correlated with average bulk elliptic flow in both central and semi-central collisions. Within the current precision, the ratios of per-event D-meson yields in the ESE-selected and unbiased samples are found to be compatible with unity. All the measurements are found to be reasonably well described by theoretical calculations including the effects of charm-quark transport and the recombination of charm quarks with light quarks in a hydrodynamically expanding medium.
Acharya, S., Adamová, D., Adler, A., Adolfsson, J., Aggarwal, M. M., Aglieri Rinella, G., Agnello, M., Agrawal, N., Ahammed, Z., Ahmad, S., Ahn, S. U., Akbar, Z., Akindinov, A., Al-Turany, M., Alam, S. N., Albuquerque, D. S.D., Aleksandrov, D., Alessandro, B., ... Zurlo, N. (2020). Transverse-momentum and event-shape dependence of D-meson flow harmonics in Pb–Pb collisions at <span class="math"><math><msqrt is="true"><mrow is="true"><msub is="true"><mrow is="true"><mi is="true">s</mi></mrow><mrow is="true"><mi mathvariant="normal" is="true">NN</mi></mrow></msub></mrow></msqrt><mo linebreak="goodbreak" linebreakstyle="after" is="true">=</mo><mn is="true">5.02</mn><mspace width="0.25em" is="true"></mspace><mtext is="true">TeV</mtext></math></span></span>. Physics Letters. B, 813. https://doi.org/10.1016/j.physletb.2020.136054
@article{osti_1787963,
author = {Acharya, S. and Adamová, D. and Adler, A. and Adolfsson, J. and Aggarwal, M. M. and Aglieri Rinella, G. and Agnello, M. and Agrawal, N. and Ahammed, Z. and Ahmad, S. and others},
title = {Transverse-momentum and event-shape dependence of D-meson flow harmonics in Pb–Pb collisions at <span class="math"><math><msqrt is="true"><mrow is="true"><msub is="true"><mrow is="true"><mi is="true">s</mi></mrow><mrow is="true"><mi mathvariant="normal" is="true">NN</mi></mrow></msub></mrow></msqrt><mo linebreak="goodbreak" linebreakstyle="after" is="true">=</mo><mn is="true">5.02</mn><mspace width="0.25em" is="true"></mspace><mtext is="true">TeV</mtext></math></span></span>},
annote = {The elliptic and triangular flow coefficients v2 and v3 of prompt D0, D+, and D*+ mesons were measured at midrapidity (|y|<0.8) in Pb–Pb collisions at the centre-of-mass energy per nucleon pair of sNN=5.02TeV with the ALICE detector at the LHC. The D mesons were reconstructed via their hadronic decays in the transverse momentum interval 1<pT<36GeV/c in central (0–10%) and semi-central (30–50%) collisions. Compared to pions, protons, and J/ψ mesons, the average D-meson vn harmonics are compatible within uncertainties with a mass hierarchy for pT≲3GeV/c, and are similar to those of charged pions for higher pT. The coupling of the charm quark to the light quarks in the underlying medium is further investigated with the application of the event-shape engineering (ESE) technique to the D-meson v2 and pT-differential yields. The D-meson v2 is correlated with average bulk elliptic flow in both central and semi-central collisions. Within the current precision, the ratios of per-event D-meson yields in the ESE-selected and unbiased samples are found to be compatible with unity. All the measurements are found to be reasonably well described by theoretical calculations including the effects of charm-quark transport and the recombination of charm quarks with light quarks in a hydrodynamically expanding medium.},
doi = {10.1016/j.physletb.2020.136054},
url = {https://www.osti.gov/biblio/1787963},
journal = {Physics Letters. B},
issn = {ISSN 0370-2693},
volume = {813},
place = {United States},
publisher = {Elsevier},
year = {2020},
month = {12}}
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