Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2009-12-08
Phys.Rev.C81:024908,2010
Physics
Nuclear Physics
Nuclear Theory
A figure, some discussion and more references are added to v.1. This paper will be published in Phys. Rev. C
Scientific paper
10.1103/PhysRevC.81.024908
For heavy-ion collisions at RHIC a scaling behavior is found in the dependencies on azimuthal angle $\phi$ and impact parameter $b$ for pion production at high $p_T$ essentially independent of the hadronization process. The scaling variable is in terms of a dynamical path length $\xi$ that takes into account detailed properties of geometry, medium density and probability of hard scattering. It is shown in the recombination model how the nuclear modification factor depends on the average $\bar\xi(\phi,b)$. The data for $\pi^0$ production at $p_T=$ 4-5 and 7-8 GeV/c at RHIC are shown to exhibit the same scaling behavior as found in the model calculation. Extension to back-to-back dijet production has been carried out, showing the existence of $\bar\xi$ scaling also in the away-side yield per trigger. At LHC the hard-parton density can be high enough to realize the likelihood of recombination of shower partons arising from neighboring jets. It is shown that such 2-jet recombination can cause strong violation of $\bar\xi$ scaling. Furthermore, the large value of $R_{AA}$ that exceeds 1 can become a striking signature of such a hadronization process at high energy.
Hwa Rudolph C.
Yang C. B.
No associations
LandOfFree
Scaling Behavior of the Azimuthal and Centrality Dependencies of Jet Production in Heavy-ion Collisions 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 Scaling Behavior of the Azimuthal and Centrality Dependencies of Jet Production in Heavy-ion Collisions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scaling Behavior of the Azimuthal and Centrality Dependencies of Jet Production in Heavy-ion Collisions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-385230