Recent Heavy-Flavor Results Utilizing the FVTX in PHENIX at RHIC

16th International Conference on Strangeness in Quark Matter

Li, Xuan^1

P-25, MS H846, Physics Divison, LANL, Los Alamos

NM

87545, United States^1

关键词: B meson decays;    Forward rapidity;    High energy heavy-ion collision;    Mass resolution;    Measurements of;    Quantum chromodynamics;    Quark-gluon plasma;    Silicon Vertex Detectors;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/779/1/012027/pdf
DOI  :  10.1088/1742-6596/779/1/012027

来源: IOP

【 摘 要 】

Heavy-flavor and quarkona production are important hard probes to test Quantum Chromodynamics (QCD) and measure the properties of the Quark Gluon Plasma (QGP) created in high energy heavy ion collisions. The new PHENIX mid- and forward-rapidity silicon vertex detectors provide precise Distance of Closest Approach (DCA) determination, allowing charm and bottom yields identification, and improve di-muon mass resolution for charmonia studies. The relative ψ(2S) over J/ψ (1S) yields measured in p+p, p+Al and p+Au data at √s= 200 GeV help us to understand nal state effects on the charmonia production. Direct access to B-meson production has been enabled via measurements of non-prompt J/ψ → μ++ μ-in p+p collisions at √s= 510 GeV and Cu+Au collisions at √s= 200 GeV. The fraction of B-meson decays in J/ψ yields in the p+p measurement agrees with higher energy results from Tevatron and the LHC. This fraction is enhanced in Cu+Au collisions suggesting the B-meson yield is not modi ed by the medium whereas J/ψ is strongly suppressed.