Identified particle production, azimuthal anisotropy, and interferometry measurements in Au+Au collisions at s(NN)**(1/2) = 9.2- GeV

The STAR collaboration
Phys.Rev.C 81 (2010) 024911, 2010.

Abstract
We present the first measurements of identified hadron production, azimuthal anisotropy, and pion interferometry from Au+Au collisions below the nominal injection energy at the Relativistic Heavy-Ion Collider (RHIC) facility. The data were collected using the large acceptance STAR detector at $\sqrt{s_{NN}}$ = 9.2 GeV from a test run of the collider in the year 2008. Midrapidity results on multiplicity density (dN/dy) in rapidity (y), average transverse momentum (<pT>), particle ratios, elliptic flow, and HBT radii are consistent with the corresponding results at similar $\sqrt{s_{NN}}$ from fixed target experiments. Directed flow measurements are presented for both midrapidity and forward rapidity regions. Furthermore the collision centrality dependence of identified particle dN/dy, <pT>, and particle ratios are discussed. These results also demonstrate the readiness of the STAR detector to undertake the proposed QCD critical point search and the exploration of the QCD phase diagram at RHIC.

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    Second order event plane resolution measured in the TPC as a function of collision centrality for.

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    Efficiency × acceptance for reconstructed pions, kaons, and protons in the TPC as a function of p_T at midrapidity.

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    Percentage of pion background contribution estimated from HIJING+GEANT as a function of p_T at midrapidity.

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    Transverse momentum spectra for charged pions at midrapidity.

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    Transverse momentum spectra for protons at midrapidity.

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    Transverse momentum spectra for antiprotons at midrapidity.

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    Transverse momentum spectra for kaons at midrapidity.

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    dN/dy of pi+ and proton, normalised by N_part/2.

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    dN/dy of pi+ and proton, normalised by N_part/2.

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    dN/dy of pi+ and proton, normalised by N_part/2.

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    dN/dy of K+ and K-, normalised by N_part/2.

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    dN/dy of K+ and K-, normalised by N_part/2.

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    dN/dy of K+ and K-, normalised by N_part/2.

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    Transverse momentum of pi+, K+ and proton.

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    Transverse momentum of pi+, K+ and proton.

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    Transverse momentum of pi+, K+ and proton.

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    K-/K+, K-/pi-, p/pi+ and K+/pi+ vs. N_part.

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    K-/K+, K-/pi-, p/pi+ and K+/pi+ vs. N_part.

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    K-/K+, K-/pi-, p/pi+ and K+/pi+ vs. N_part.

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    dN/d_eta, normalised by N_part/2, as a function of sqrt(S_NN).

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    dN/dy, normalised by N_part/2; and m_t - m of pi+ and pi- as functions of sqrt(S_NN).

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    dN/dy, normalised by N_part/2; and m_t - m of K+ and K- as functions of sqrt(S_NN).

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    pi-/pi+, pbar/p, K-/K+, K+/pi+ and K-/pi- as functions of sqrt(S_NN).

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    v1 as a function of eta and eta/y-beam from different experiments and methods.

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    v2 as a function of p_T for different particle species and experiments.

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    v2 as a function of s_NN from different experiments.

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    T-mu_B plot for heavy-ion collisions at different s_NN.

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