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Forward Lambda production and nuclear stopping power in d + Au collisions at s(NN)**(1/2) = 200-GeV

The STAR collaboration
Phys.Rev.C 76 (2007) 064904, 2007.

Abstract (data abstract)
We report the measurement of Lamda and Anti-Lamda yields and inverse slope parameters in d + Au collisions at $\sqrt{s_{NN}}$ = 200 GeV at forward and backward rapidities (y = $\pm$2.75), using data from the STAR forward time projection chambers. The contributions of different processes to baryon transport and particle production are probed exploiting the inherent asymmetry of the d + Au system. Comparisons to model calculations show that the baryon transport on the deuteron side is consistent with multiple collisions of the deuteron nucleons with gold participants. On the gold side HIJING based models do not describe the measured particle yields while models with initial state nuclear effects and/or hadronic rescattering do. The Multi-Chain Model can provide a good description of the net baryon density in d + Au collisions at RHIC, and the derived parameters of the model agree with those from nuclear collisions at lower energies.

  • Figure 1 a

    Data from Figure 1 a

    10.17182/hepdata.98961.v1/t1

    (Color online) a) Invariant mass distribution of $\Lambda$ candidates on the deuteron side with estimated $K_{s}^{0}$ background distribution, b) and...

  • Figure 1 b

    Data from Figure 1 b

    10.17182/hepdata.98961.v1/t2

    (Color online) a) Invariant mass distribution of $\Lambda$ candidates on the deuteron side with estimated $K_{s}^{0}$ background distribution, b) and...

  • Figure 1 c

    Data from Figure 1 c

    10.17182/hepdata.98961.v1/t3

    (Color online) a) Invariant mass distribution of $\Lambda$ candidates on the deuteron side with estimated $K_{s}^{0}$ background distribution, b) and...

  • Figure 2

    Data from Figure 2

    10.17182/hepdata.98961.v1/t4

    (Color online) $\Lambda$ and $\overline{\Lambda}$ spectra on the deuteron and on the gold side in $d$ + Au minimum bias...

  • Figure 3 a

    Data from Figure 3 a

    10.17182/hepdata.98961.v1/t5

    (Color online) (a) Comparison of the measured $\overline{\Lambda}$ yield with model calculations. Statistical errors are shown as vertical error bars,...

  • Figure 3 b

    Data from Figure 3 b

    10.17182/hepdata.98961.v1/t6

    (Color online) (b) Comparison of the net $\Lambda$ yield with model calculations. Statistical errors are shown as vertical error bars,...

  • Figure 4 bottom left

    Data from Figure 4 bottom left

    10.17182/hepdata.98961.v1/t7

    (Color online) Comparison of $\overline{\Lambda}$ and net $\Lambda$ yields to model calculations for all three centrality classes. Statistical errors are...

  • Figure 4 bottom middle

    Data from Figure 4 bottom middle

    10.17182/hepdata.98961.v1/t8

    (Color online) Comparison of $\overline{\Lambda}$ and net $\Lambda$ yields to model calculations for all three centrality classes. Statistical errors are...

  • Figure 4 bottom right

    Data from Figure 4 bottom right

    10.17182/hepdata.98961.v1/t9

    (Color online) Comparison of $\overline{\Lambda}$ and net $\Lambda$ yields to model calculations for all three centrality classes. Statistical errors are...

  • Figure 4 top left

    Data from Figure 4 top left

    10.17182/hepdata.98961.v1/t10

    (Color online) Comparison of $\overline{\Lambda}$ and net $\Lambda$ yields to model calculations for all three centrality classes. Statistical errors are...

  • Figure 4 top middle

    Data from Figure 4 top middle

    10.17182/hepdata.98961.v1/t11

    (Color online) Comparison of $\overline{\Lambda}$ and net $\Lambda$ yields to model calculations for all three centrality classes. Statistical errors are...

  • Figure 4 top right

    Data from Figure 4 top right

    10.17182/hepdata.98961.v1/t12

    (Color online) Comparison of $\overline{\Lambda}$ and net $\Lambda$ yields to model calculations for all three centrality classes. Statistical errors are...

  • Figure 5

    Data from Figure 5

    10.17182/hepdata.98961.v1/t13

    (Color online) Minimum bias $\overline{\Lambda}/\Lambda$ ratio compared to model calculations. On the deuteron side HIJING/BB shows the best agreement with...

  • Figure 6 bottom left

    Data from Figure 6 bottom left

    10.17182/hepdata.98961.v1/t14

    $\overline{\Lambda}/\Lambda$ ratio and net $\Lambda$ and $\overline{\Lambda}$ yields as a function of collision centrality on both the deuteron (left) and...

  • Figure 6 bottom right

    Data from Figure 6 bottom right

    10.17182/hepdata.98961.v1/t15

    $\overline{\Lambda}/\Lambda$ ratio and net $\Lambda$ and $\overline{\Lambda}$ yields as a function of collision centrality on both the deuteron (left) and...

  • Figure 6 top left

    Data from Figure 6 top left

    10.17182/hepdata.98961.v1/t16

    $\overline{\Lambda}/\Lambda$ ratio and net $\Lambda$ and $\overline{\Lambda}$ yields as a function of collision centrality on both the deuteron (left) and...

  • Figure 6 top right

    Data from Figure 6 top right

    10.17182/hepdata.98961.v1/t17

    $\overline{\Lambda}/\Lambda$ ratio and net $\Lambda$ and $\overline{\Lambda}$ yields as a function of collision centrality on both the deuteron (left) and...

  • Figure 7

    Data from Figure 7

    10.17182/hepdata.98961.v1/t18

    (Color online) Net $\Lambda dN/dy$ for central, mid-central and peripheral events on both the deuteron and the Au side of...

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