Atomic mass dependence of hadron production in semi-inclusive deep inelastic lepton-nucleus scattering

SONG Li-Hua; LIU Na; DUAN Chun-Gui

doi:10.1088/1674-1137/37/8/084102

Chinese Physics C> 2013, Vol. 37> Issue(8) : 084102 DOI: 10.1088/1674-1137/37/8/084102

Atomic mass dependence of hadron production in semi-inclusive deep inelastic lepton-nucleus scattering

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Hadron production in lepton-nucleus deep inelastic scattering is studied in a quark energy loss model. The leading-order computations for hadron multiplicity ratios are presented and compared with the selected HERMES pions production data with the quark hadronization occurring outside the nucleus by means of the hadron formation time. It is found that the obtained energy loss per unit length is 0.440 ± 0.013 GeV/fm for an outgoing quark by the global fit. It is confirmed that the atomic mass number dependence of hadron attenuation is theoretically and experimentally in good agreement with the A^2/3 power law for quark hadronization occurring outside the nucleus.

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SONG Li-Hua, LIU Na and DUAN Chun-Gui. Atomic mass dependence of hadron production in semi-inclusive deep inelastic lepton-nucleus scattering[J]. Chinese Physics C, 2013, 37(8): 084102. doi: 10.1088/1674-1137/37/8/084102

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Received: 2012-09-26
Revised: 2013-05-13

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沈阳化工大学材料科学与工程学院沈阳 110142

Atomic mass dependence of hadron production in semi-inclusive deep inelastic lepton-nucleus scattering

Corresponding author: DUAN Chun-Gui,

Received Date: 2012-09-26

Accepted Date: 2013-05-13

Available Online: 2013-08-05

Abstract: Hadron production in lepton-nucleus deep inelastic scattering is studied in a quark energy loss model. The leading-order computations for hadron multiplicity ratios are presented and compared with the selected HERMES pions production data with the quark hadronization occurring outside the nucleus by means of the hadron formation time. It is found that the obtained energy loss per unit length is 0.440 ± 0.013 GeV/fm for an outgoing quark by the global fit. It is confirmed that the atomic mass number dependence of hadron attenuation is theoretically and experimentally in good agreement with the A^2/3 power law for quark hadronization occurring outside the nucleus.

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Atomic mass dependence of hadron production in semi-inclusive deep inelastic lepton-nucleus scattering

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