Initial-State Nuclear Effects in High Energy p-A Drell-Yan Process

  • Nuclear shadowing and energy loss effects are two important initial-state nuclear effects in hadron-nucleus collisions. In this paper, by means of the nuclear parton distributions extracted only from lepton deep-inelastic scattering experimental data, the energy loss effect in Drell-Yan dimuon production process is studied in the color string model. By a χ2 analysis of the experimental data given by FNAL E772 and E866, we found the rate of quark energy loss per unit path length: -dE/dz=2.06GeV/fm, which is almost the same as the result expected by the model -dE/dz≈2GeV/fm. The calculated results are compared with the E772 and E866 data. It is shown that the theoretical results considered the energy loss effect are in good agreement with the experimental data.
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WANG Hong-Min, SUN Xian-Jing and HOU Zhao-Yu. Initial-State Nuclear Effects in High Energy p-A Drell-Yan Process[J]. Chinese Physics C, 2007, 31(11): 1040-1044.
WANG Hong-Min, SUN Xian-Jing and HOU Zhao-Yu. Initial-State Nuclear Effects in High Energy p-A Drell-Yan Process[J]. Chinese Physics C, 2007, 31(11): 1040-1044. shu
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Received: 2007-03-12
Revised: 2007-04-08
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Initial-State Nuclear Effects in High Energy p-A Drell-Yan Process

    Corresponding author: WANG Hong-Min,
  • Physics Department, Academy of Armored Forces Engineering of PLA, Beijing 100072, China2 Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China3 Physics Graduate School, Shijiazhuang Railway Institute, Shijiazhuang 050043, China

Abstract: Nuclear shadowing and energy loss effects are two important initial-state nuclear effects in hadron-nucleus collisions. In this paper, by means of the nuclear parton distributions extracted only from lepton deep-inelastic scattering experimental data, the energy loss effect in Drell-Yan dimuon production process is studied in the color string model. By a χ2 analysis of the experimental data given by FNAL E772 and E866, we found the rate of quark energy loss per unit path length: -dE/dz=2.06GeV/fm, which is almost the same as the result expected by the model -dE/dz≈2GeV/fm. The calculated results are compared with the E772 and E866 data. It is shown that the theoretical results considered the energy loss effect are in good agreement with the experimental data.

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