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First Observation of the Directed Flow of D0 and D0 ̄ in Au+Au Collisions at sNN =200 GeV
Resource type
Authors/contributors
- STAR Collaboration (Author)
- Finch, Evan (Contributor)
Title
First Observation of the Directed Flow of D0 and D0 ̄ in Au+Au Collisions at sNN =200 GeV
Abstract
We report the first measurement of rapidity-odd directed flow (v1) for D0 and D0̄ mesons at midrapidity (|y|<0.8) in Au+Au collisions at sNN=200 GeV using the STAR detector at the Relativistic Heavy Ion Collider. In 10-80% Au+Au collisions, the slope of the v1 rapidity dependence (dv1/dy), averaged over D0 and D0̄ mesons, is -0.080±0.017(stat)±0.016(syst) for transverse momentum pT above 1.5 GeV/c. The absolute value of D0 meson dv1/dy is about 25 times larger than that for charged kaons, with 3.4σ significance. These data give a unique insight into the initial tilt of the produced matter, and offer constraints on the geometric and transport parameters of the hot QCD medium created in relativistic heavy-ion collisions. © 2019 American Physical Society.
Publication
Physical Review Letters
Publisher
American Physical Society
Date
2019
Volume
123
Issue
16
Journal Abbr
Phys Rev Lett
Citation Key
starcollaborationFirstObservationDirected2019
ISSN
00319007 (ISSN)
Archive
Scopus
Language
English
Extra
47 citations (Crossref) [2023-10-31]
Citation
STAR Collaboration. (2019). First Observation of the Directed Flow of D0 and D0 ̄ in Au+Au Collisions at sNN =200 GeV. Physical Review Letters, 123(16). Scopus. https://doi.org/10.1103/PhysRevLett.123.162301
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