A theory of jet shapes and cross sections: from hadrons to nuclei

Abstract

For jets, with great power comes great opportunity. The unprecedented center of mass energies available at the LHC open new windows on the QGP: we demonstrate that jet shape and jet cross section measurements become feasible as a new, differential and accurate test of the underlying QCD theory. We present a first step in understanding these shapes and cross sections in heavy ion reactions. Our approach allows for detailed simulations of the experimental acceptance/cuts that help isolate jets in such high-multiplicity environment. It is demonstrated for the first time that the pattern of stimulated gluon emission can be correlated with a variable quenching of the jet rates and provide an approximately model-independent approach to determining the characteristics of the medium-induced bremsstrahlung spectrum. Surprisingly, in realistic simulations of parton propagation through the QGP we find a minimal increase in the mean jet radius even for large jet attenuation. Jet broadening is manifest in the tails of the energy distribution away from the jet axis and its quantification requires high statistics measurements that will be possible at the LHC.

20 pages, 15 ps and eps figures

References in corpus (18)

• PYTHIA 6.4 Physics and Manual
• Dihadron azimuthal correlations in Au+Au collisions at sqrt(s_NN)=200 GeV
• k_T factorization is violated in production of high-transverse-momentum particles in hadron-hadron collisions
• Systematic Comparison of Jet Energy-Loss Schemes in a realistic hydrodynamic medium
• Heavy ion event generator HYDJET++ (HYDrodynamics plus JETs)
• Non-Abelian energy loss in cold nuclear matter
• Collisional dissociation of heavy mesons in dense QCD matter
• Quantitative Constraints on the Transport Properties of Hot Partonic Matter from Semi-Inclusive Single High Transverse Momentum Pion Suppression in Au+Au collisions at sqrt(s_NN) = 200 GeV
• Testing the theory of QGP-induced energy loss at RHIC and the LHC
• A systematic study of direct photon production in heavy ion collisions
• Open charm tomography of cold nuclear matter
• Formation and decay of hadronic resonances in the QGP
• Three-Particle Azimuthal Correlations
• Understanding jet quenching and medium response with di-hadron correlation
• Search for Conical Emission with Three-Particle Correlations
• Up to and beyond ninth order in opacity: Radiative energy loss with GLV
• Simulation of jet quenching and high-pT particle production at RHIC and LHC
• Prospects for identified leading particle correlation at LHC and in ALICE

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