Disappearance of back-to-back high $p_{T}$ hadron correlations in central Au+Au collisions at $\sqrt{s_{NN}}$ = 200-GeV

The STAR collaboration
Phys.Rev.Lett. 90 (2003) 082302, 2003.

Abstract (data abstract)
Azimuthal correlations for large transverse momentum charged hadrons have been measured over a wide pseudorapidity range and full azimuth in Au+Au and p+p collisions at $\sqrt{s_{_{\rm NN}}}=$200 GeV. The small-angle correlations observed in p+p collisions and at all centralities of Au+Au collisions are characteristic of hard-scattering processes previously observed in high-energy collisions. A strong back-to-back correlation exists for p+p and peripheral Au+Au. In contrast, the back-to-back correlations are reduced considerably in the most central Au+ Au collisions, indicating substantial interaction as the hard-scattered partons or their fragmentation products traverse the medium.

  • Figure 1.0

    Data from Figure 1.0

    10.17182/hepdata.101748.v1/t1

    Azimuthal distributions of opposite-sign pairs in p+p collisions. All correlation functions require a trigger particle with $4<p_T^{\rm trig}<6$ GeV/$c$ and...

  • Figure 1.1

    Data from Figure 1.1

    10.17182/hepdata.101748.v1/t2

    Azimuthal distributions of same-sign pairs in p+p collisions. All correlation functions require a trigger particle with $4<p_T^{\rm trig}<6$ GeV/$c$ and...

  • Figure 1.2

    Data from Figure 1.2

    10.17182/hepdata.101748.v1/t3

    Azimuthal distributions of same-sign and opposite-sign pairs in minimum bias and background-subtracted 0-10% central Au+Au collisions. All correlation functions require...

  • Figure 2.0

    Data from Figure 2.0

    10.17182/hepdata.101748.v1/t4

    Azimuthal distributions for Au+Au collisions compared to the expected distributions estimated by $D^{\rm model}$. All correlation functions require a trigger...

  • Figure 2.1

    Data from Figure 2.1

    10.17182/hepdata.101748.v1/t5

    Azimuthal distributions for Au+Au collisions compared to the expected distributions estimated by $D^{\rm model}$. All correlation functions require a trigger...

  • Figure 2.2

    Data from Figure 2.2

    10.17182/hepdata.101748.v1/t6

    Azimuthal distributions for Au+Au collisions compared to the expected distributions estimated by $D^{\rm model}$. All correlation functions require a trigger...

  • Figure 2.3

    Data from Figure 2.3

    10.17182/hepdata.101748.v1/t7

    Azimuthal distributions for Au+Au collisions compared to the expected distributions estimated by $D^{\rm model}$. All correlation functions require a trigger...

  • Figure 3.0

    Data from Figure 3.0

    10.17182/hepdata.101748.v1/t8

    Ratio of Au+Au and p+p for small-angle ($|\Delta\phi|$<0.75 rad) and back-to-back ($|\Delta\phi|$<2.24 rad) azimuthal regions versus number of participating nucleons...

  • Figure 3.1

    Data from Figure 3.1

    10.17182/hepdata.101748.v1/t9

    Systematic uncertainty on number of participating nucleons ($N_{\rm part}$) in Au+Au collisions.

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