Multiple Parton Scattering in Nuclei: Beyond Helicity Amplitude Approximation

Details Multiple Parton Scattering in Nuclei: Beyond Helicity Amplitude Approximation Multiple Parton Scattering in Nuclei: Beyond Helicity Amplitude Approximation

2003-01-22

arxiv.org/abs/hep-ph/0301195v1

Nucl.Phys. A720 (2003) 429-451

Physics

High Energy Physics

High Energy Physics - Phenomenology

20 pages, 14 figures

Scientific paper

10.1016/S0375-9474(03)01003-0

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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