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arXiv · hep-ph/9608322

Radiative energy loss and $p_{\perp}$-broadening of high energy partons in nuclei

R. Baier·Yu. L. Dokshitzer·A. H. Mueller·S. Peign·D. Schiff
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Abstract

The medium-induced $p_{\perp}$-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 $p_{\perp W}^2$. We find dE/dz = (1/8)α_s N_c $p_{\perp W}^2$ holds independent of the details of the parton-nucleon scatterings so long as L is large. Numerical estimates suggest that $p_{\perp}$-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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R. Baier, Yu. L. Dokshitzer, A. H. Mueller, S. Peign, D. Schiff. 1996-08-14. Radiative energy loss and $p_{\perp}$-broadening of high energy partons in nuclei. https://doi.org/10.1016/s0550-3213(96)00581-0

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