Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1993-06-02
Nucl.Phys.B420:583-614,1994
Physics
Nuclear Physics
Nuclear Theory
42 pages in LaTex, LBL-32682 and CU-TP-598
Scientific paper
10.1016/0550-3213(94)90079-5
Induced soft gluon bremsstrahlung associated with multiple collisions is calculated via perturbative QCD. We derive the non-abelian analog of the Landau-Pomeranchuk effect that suppresses induced soft radiation with formation times exceeding the mean free path, $\lambda$. The dependence of the suppression effect on the $SU(N)$ representation of the jet parton as well as the kinematic variables is expressed through a radiation formation factor. Unlike in QED, the finite contribution from the small $x$ regime in QCD leads to an approximately constant radiative energy loss per unit length, $dE/dz\propto \mu^2$, in the high energy limit that is sensitive to the infrared screening scale, $\mu$, of the medium. As a function of the dimensionless parameter $\zeta=\lambda \mu^2/E$, we show furthermore how the energy dependence of $dE/dz$ evolves from the above constant for $\zeta\ll 1$ to the more familiar (Bethe-Heitler) linear dependence for $\zeta \gg 1$.
Gyulassy Mikols
Wang Xin-Nian
No associations
LandOfFree
Multiple Collisions and Induced Gluon Bremsstrahlung in QCD does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Multiple Collisions and Induced Gluon Bremsstrahlung in QCD, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiple Collisions and Induced Gluon Bremsstrahlung in QCD will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-438672