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arXiv · hep-ph/0301195

Multiple Parton Scattering in Nuclei: Beyond Helicity Amplitude Approximation

Ben-Wei Zhang·Xin-Nian Wang
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Abstract

Multiple parton scattering and induced parton energy loss in deeply inelastic scattering (DIS) off heavy nuclei is studied within the framework of generalized factorization in perturbative QCD with a complete calculation beyond the helicity amplitude (or soft bremsstrahlung) approximation. Such a calculation gives rise to new corrections to the modified quark fragmentation functions. The effective parton energy loss is found to be reduced by a factor of 5/6 from the result of helicity amplitude approximation.

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Ben-Wei Zhang, Xin-Nian Wang. 2003-01-22. Multiple Parton Scattering in Nuclei: Beyond Helicity Amplitude Approximation. https://doi.org/10.1016/s0375-9474(03)01003-0

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