Energy Dependence of Moments of Net-Proton and Net-Charge Multiplicity Distributions at STAR

  title={Energy Dependence of Moments of Net-Proton and Net-Charge Multiplicity Distributions at STAR},
  author={Xiaofeng Luo},
  journal={arXiv: Nuclear Experiment},
  • Xiaofeng Luo
  • Published 9 March 2015
  • Physics
  • arXiv: Nuclear Experiment
We present the energy dependence of moments of net-proton and net-charge multiplicity distributions in Au+Au collisions measured by the STAR experiment in the first phase of the Beam Energy Scan (BES) at the Relativistic Heavy Ion Collider (RHIC). By using the time of flight detector for particle identification, the upper transverse momentum ($p_{T}$) limit for proton and anti-proton is extended from 0.8 GeV/c up to 2 GeV/c. The $p_{T}$ and rapidity acceptance dependence study for the moments… 

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  • Rev. C91, 034907
  • 2015
At the Frontier of Particle Physics: Handbook of QCD
STAR Collaboration
  • Phys. A 931, 808-813
  • 2014
JHEP 0203
  • 014(2002); 0404,050(2004); R. V. Gavai, S. Gupta, Phys. Rev. D 71, 114014 (2005); 78, 114503
  • 2008
  • Lett. B 695, 136
  • 2011
G: Nucl
  • Part. Phys. 39, 025008
  • 2012