Overview of recent results from the Beam Energy Scan program in the STAR experiment

2016 ◽  
Author(s):  
Andrzej Lipiec
Keyword(s):  
Beam Energy ◽  
Star Experiment ◽  
Beam Energy Scan

scholarly journals MWPC Prototyping and Testing for STAR Inner TPC Upgrade

2018 ◽  
Vol 46 ◽  
pp. 1860079
Author(s):  
Shuai Wang
Keyword(s):  
Beam Energy ◽  
Qcd Phase Transition ◽  
Proportional Chamber ◽  
Physics Program ◽  
Momentum Resolution ◽  
Multiwire Proportional Chamber ◽  
Star Experiment ◽  
Transition Study ◽  
Time Projection ◽  
Beam Energy Scan

The STAR experiment at RHIC is upgrading the inner sectors of the Time Projection Chamber (iTPC) to increase the segmentation on the inner padplane from 13 to 40 rows and to replace the inner sector multiwire proportional chamber (MWPC). The upgrade will provide better momentum resolution, better dE/dx resolution, and most importantly it will provide improved acceptance at high rapidity to [Formula: see text]1.5 compared to the current TPC coverage of [Formula: see text]1.0. The enhanced TPC capabilities based on this upgrade are critical to the physics program of the Beam Energy Scan Phase II at RHIC during 2019-2020, in particular the QCD phase transition study. In this proceedings, the iTPC MWPC module fabrication and prototype testing results are discussed.

scholarly journals Highlights from the STAR experiment

2019 ◽  
Vol 204 ◽  
pp. 01018
Author(s):  
Alexey Aparin
Keyword(s):  
Beam Energy ◽  
Star Collaboration ◽  
Fixed Target ◽  
Directed Flow ◽  
Decay Modes ◽  
Charm Quarks ◽  
Star Experiment ◽  
The One ◽  
Beam Energy Scan ◽  
Program Show

We present an overview of the recent results obtained by the STAR Collaboration at RHIC.We report the beam energy dependence of directed flow of strange particles. These results support the assumption, that directed flow is formed before hadronization and observed particles are formed via coalescence of constituent quarks. First evidence of a non-zero directed flow of D0 meson is reported. We present the precision measurement of elliptic flow of D0 meson and the first measurement of Λc baryon in Au+Au collisions at $\rad{}{s_{NN} } = 200\,{\rm{GeV}}$, which suggests thermalization of charm quarks. We report results of global Λ polarization measurements in Au+Au collisions, together with the investigation of polarization dependence of centrality and transverse momentum pT. Results from the STAR fixed-target program show good agreement with previously obtained results. A precise measurement of the $_{{\rm{\Lambda }}}^{3} H$ lifetime is presented. Mesonic decay modes are used to reconstruct the $_{{\rm{\Lambda }}}^{3} H$ from Au+Au collisions. The measured lifetime is about 50% shorter than the one of a free Λ, indicating a strong hyperon-nucleon interaction in the hypernucleus system. Finally, we give an outlook to detector upgrades for the Beam Energy Scan phase II.

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