Measurement of prompt D-0 and D-0 meson azimuthal anisotropy and search for strong electric fields in PbPb collisions at root S-NN=5.02 TeV
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Published version
Author(s)
Type
Journal Article
Abstract
The strong Coulomb field created in ultrarelativistic heavy ion collisions is expected to produce a rapiditydependent difference (v2) in the second Fourier coefficient of the azimuthal distribution (elliptic flow,
v2) between D0 (uc) and D0 (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 v2. The rapidity-averaged value is
found to be v2 = 0.001±0.001 (stat)±0.003 (syst) in PbPb collisions at √sNN = 5.02 TeV. In addition,
the influence of the collision geometry is explored by measuring the D0 and D0
mesons v2 and triangular
flow coefficient (v3) as functions of rapidity, transverse momentum (pT), and event centrality (a measure
of the overlap of the two Pb nuclei). A clear centrality dependence of prompt D0 meson v2 values is
observed, while the v3 is largely independent of centrality. These trends are consistent with expectations
of flow driven by the initial-state geometry.
v2) between D0 (uc) and D0 (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 v2. The rapidity-averaged value is
found to be v2 = 0.001±0.001 (stat)±0.003 (syst) in PbPb collisions at √sNN = 5.02 TeV. In addition,
the influence of the collision geometry is explored by measuring the D0 and D0
mesons v2 and triangular
flow coefficient (v3) as functions of rapidity, transverse momentum (pT), and event centrality (a measure
of the overlap of the two Pb nuclei). A clear centrality dependence of prompt D0 meson v2 values is
observed, while the v3 is largely independent of centrality. These trends are consistent with expectations
of flow driven by the initial-state geometry.
Date Issued
2021-05-10
Date Acceptance
2021-03-25
Citation
Physics Letters B: Nuclear Physics and Particle Physics, 2021, 816, pp.1-25
ISSN
0370-2693
Publisher
Elsevier
Start Page
1
End Page
25
Journal / Book Title
Physics Letters B: Nuclear Physics and Particle Physics
Volume
816
Copyright Statement
© 2021 The Author. Published by Elsevier B.V. This is an open access article under the CC BY license
(http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3.
(http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3.
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000647421500046&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Physical Sciences
Astronomy & Astrophysics
Physics, Nuclear
Physics, Particles & Fields
Physics
CMS
Heavy-flavor
Charm
Electromagnetic fields
LARGE HADRON COLLIDER
HEAVY-FLAVOR
PERSPECTIVE
FLOW
Publication Status
Published
OA Location
https://www.sciencedirect.com/science/article/pii/S0370269321001283?via%3Dihub
Article Number
ARTN 136253
Date Publish Online
2021-03-29