Measurement of prompt D 0 and D‾ 0 meson azimuthal anisotropy and search for strong electric fields in PbPb collisions at s NN =5.02TeV

CMS Collaboration, Freya Blekman, Emil Sørensen Bols, Simranjit Singh Chhibra, Jorgen D'Hondt, Jarne Theo De Clercq, Denys Lontkovskyi, Steven Lowette, Ivan Marchesini, Seth Moortgat, Quentin Python, Stefaan Tavernier, Walter Van Doninck, Petra Van Mulders

Onderzoeksoutput: Articlepeer review

21 Citaten (Scopus)
57 Downloads (Pure)

Samenvatting

The strong Coulomb field created in ultrarelativistic heavy ion collisions is expected to produce a rapidity-dependent difference (Δv 2) in the second Fourier coefficient of the azimuthal distribution (elliptic flow, v 2) between D 0 (u‾c) and D‾ 0 (uc‾) mesons. Motivated by the search for evidence of this field, the CMS detector at the LHC is used to perform the first measurement of Δv 2. The rapidity-averaged value is found to be 〈Δv 2〉=0.001±0.001(stat)±0.003(syst) in PbPb collisions at s NN =5.02TeV. In addition, the influence of the collision geometry is explored by measuring the D 0 and D‾ 0mesons v 2 and triangular flow coefficient (v 3) as functions of rapidity, transverse momentum (p T), and event centrality (a measure of the overlap of the two Pb nuclei). A clear centrality dependence of prompt D 0 meson v 2 values is observed, while the v 3 is largely independent of centrality. These trends are consistent with expectations of flow driven by the initial-state geometry.

Originele taal-2English
Artikelnummer136253
Aantal pagina's25
TijdschriftPhys. Lett. B
Volume816
Nummer van het tijdschrift2021
DOI's
StatusPublished - 10 mei 2021

Bibliografische nota

Replaced with the published version. Added the journal reference. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/HIN-19-008 (CMS Public Pages)

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