paper

Radiative energy loss and -broadening of high energy partons in nuclei

arXiv:hep-ph/9608322 · doi:10.1016/S0550-3213(96)00581-0

Abstract

The medium-induced -broadening and induced gluon radiation spectrum of a high energy quark or gluon traversing a large nucleus is studied. Multiple scattering of the high energy parton in the nucleus is treated in the Glauber approximation. We show that -dE/dz, the radiative energy loss of the parton per unit length, grows as L, the length of the nuclear matter, as does the characteristic transverse momentum squared of the parton . We find dE/dz = (1/8)α_s N_c holds independent of the details of the parton-nucleon scatterings so long as L is large. Numerical estimates suggest that -broadening and energy loss may be significantly enhanced in hot matter as compared to cold matter, thus making the study of such quantities a possible signal for quark-gluon plasma formation.

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