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

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

1996-08-14

arxiv.org/abs/hep-ph/9608322v1

Nucl.Phys.B484:265-282,1997

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTex2e, 18 pages, epsf, 2 postscript figures

Scientific paper

10.1016/S0550-3213(96)00581-0

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)\alpha_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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