Measurement of non-prompt D.sup.0./sup.-meson elliptic flow in Pb-Pb collisions at √s.sub.NN./sub.=5.02 TeV

0582699 - ÚJF 2024 RIV DE eng J - Článek v odborném periodiku
Acharya, S. - Adamová, Dagmar - Aglieri Rinella, G. - Agnello, M. - Bielčík, J. - Bielčíková, Jana - Broz, M. - Contreras, J. G. - Filová, V. - Grecká, Ekaterina - Grund, D. - Haidlová, S. - Herman, T. - Isakov, Artem - Khuntia, A. - Kotliarov, Artem - Krupová, D. M. - Křížek, Filip - Kushpil, Svetlana - Šafařík, K. - Torres, S. R. - Závada, Petr … celkem 1044 autorů
Measurement of non-prompt D⁰-meson elliptic flow in Pb-Pb collisions at √s_NN=5.02 TeV.
European Physical Journal C. Roč. 83, č. 12 (2023), č. článku 1123. ISSN 1434-6044. E-ISSN 1434-6052
Výzkumná infrastruktura: CERN-CZ III - 90240
Institucionální podpora: RVO:68378271 ; RVO:61389005
Klíčová slova: ALICE collaboration * heavy ion collisons * hadrons
Obor OECD: Nuclear physics; Particles and field physics (FZU-D)
Impakt faktor: 4.4, rok: 2022
Způsob publikování: Open access
https://doi.org/10.1140/epjc/s10052-023-12259-3

The elliptic flow (v2) of D mesons from beauty-hadron decays (non-prompt D) was measured in midcentral (30–50%) Pb–Pb collisions at a centre-of-mass energy per nucleon pair sNN=5.02 TeV with the ALICE detector at the LHC. The D mesons were reconstructed at midrapidity (| y| < 0.8) from their hadronic decay D → K -π + , in the transverse momentum interval 2 < pT< 12 GeV/c. The result indicates a positive v2 for non-prompt D mesons with a significance of 2.7 σ . The non-prompt D -meson v2 is lower than that of prompt non-strange D mesons with 3.2 σ significance in 2<pT<8GeV/c , and compatible with the v2 of beauty-decay electrons. Theoretical calculations of beauty-quark transport in a hydrodynamically expanding medium describe the measurement within uncertainties.
Trvalý link: https://hdl.handle.net/11104/0350780