TY - JOUR
T1 - Anomalous conical di-jet correlations in pQCD vs AdS/CFT
AU - Betz, Barbara
AU - Gyulassy, Miklos
AU - Noronha, Jorge
AU - Torrieri, Giorgio
N1 - Funding Information:
We thank S. Gubser, A. Yarom, and S. Pufu for providing numerical AdS/CFT stress tables, D. Rischke for permission to use his SHASTA code. The authors thank W. Zajc, B. Müller, M. Strickland, J. Ulery, R. Neufeld, W. Horowitz, H. Stöcker, D. Rischke, C. Greiner, J. Reinhardt, and I. Mishustin for valuable comments and suggestions. J.N. and M.G. acknowledge support from DOE under Grant No. DE-FG02-93ER40764. M.G. acknowledges sabbatical support from DFG, ITP, and FIAS at Goethe University. G.T. thanks the Alexander Von Humboldt foundation and Goethe University for support.
PY - 2009/5/18
Y1 - 2009/5/18
N2 - We propose an identified heavy quark jet observable to discriminate between weakly coupled pQCD and strongly coupled AdS/CFT models of quark-gluon plasma dynamics in ultra-relativistic nuclear collisions at RHIC and LHC energies. These models are shown to predict qualitatively different associated hadron correlations with respect to tagged heavy quark jets. While both models feature similar far zone Mach and diffusion wakes, the far zone stress features are shown to be too weak to survive thermal broadening at hadron freeze-out. However, these models differ significantly in a near zone "Neck" region where strong chromo-fields sourced by the heavy quark jet couple to the polarizable plasma. Conical associated correlations, if any, are shown to be dominated by the jet induced transverse flow in the Neck zone and unrelated to the weak far zone wakes. Unlike in AdS/CFT, we show that the induced transverse flow in the Neck zone is too weak in pQCD to produce conical correlations after Cooper-Frye freeze-out. The observation of conical correlations violating Mach's law would favor the strongly-coupled AdS/CFT string drag dynamics, while their absence would favor weakly-coupled pQCD-based chromo-hydrodynamics.
AB - We propose an identified heavy quark jet observable to discriminate between weakly coupled pQCD and strongly coupled AdS/CFT models of quark-gluon plasma dynamics in ultra-relativistic nuclear collisions at RHIC and LHC energies. These models are shown to predict qualitatively different associated hadron correlations with respect to tagged heavy quark jets. While both models feature similar far zone Mach and diffusion wakes, the far zone stress features are shown to be too weak to survive thermal broadening at hadron freeze-out. However, these models differ significantly in a near zone "Neck" region where strong chromo-fields sourced by the heavy quark jet couple to the polarizable plasma. Conical associated correlations, if any, are shown to be dominated by the jet induced transverse flow in the Neck zone and unrelated to the weak far zone wakes. Unlike in AdS/CFT, we show that the induced transverse flow in the Neck zone is too weak in pQCD to produce conical correlations after Cooper-Frye freeze-out. The observation of conical correlations violating Mach's law would favor the strongly-coupled AdS/CFT string drag dynamics, while their absence would favor weakly-coupled pQCD-based chromo-hydrodynamics.
UR - http://www.scopus.com/inward/record.url?scp=65349148610&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=65349148610&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2009.04.026
DO - 10.1016/j.physletb.2009.04.026
M3 - Article
AN - SCOPUS:65349148610
SN - 0370-2693
VL - 675
SP - 340
EP - 346
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 3-4
ER -