D. Schiff

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

The medium-induced p⊥-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 p2⊥w. We find −dE/dz = 18αsNcp2⊥w holds independent of the details of the parton-nucleon scatterings so long as L is large and so long as perturbative QCD applies at short distances. Numerical estimates suggest that p⊥-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.

Energy loss in perturbative QCD

▪ Abstract We review the propagation of energetic partons in hot or cold QCD matter, as known from recent work. We summarize advances in the understanding of both collisional and radiative energy l...

Bottom-up thermalization in heavy ion collisions

We describe how thermalization occurs in heavy ion collisions in the framework of perturbative QCD. When the saturation scale

Medium-induced radiative energy loss; equivalence between the BDMPS and Zakharov formalisms

Q_s

Quenching of hadron spectra in media

is large compared to

Predictions for

\Lambda_{QCD}

p+

, thermalization takes place during a time of order

Pb Collisions at sqrt s_NN = 5 TeV

\alpha^{-13/5}Q_s^{-1}

PREDICTIONS FOR p+Pb COLLISIONS AT

and the maximal temperature achieved is

\sqrt{s_{_{\it NN}}} = 5

\alpha^{2/5}Q_s