Daniel Pablos (Universitat de Barcelona)
We propose and explore a new hybrid approach to jet energy loss in a strongly coupled medium. The basis of this phenomenological approach is to treat physics processes at different energy scales differently. The high-$Q^2$ processes associated with the QCD evolution of the jet from the hard production up to hadronization are treated perturbatively, following DGLAP evolution, to which we ascribe a space-time structure. The interactions of the shower partons with the deconfined matter leads to energy loss, which is dominated by soft processes and therefore, strong coupling effects are important. These interactions are modeled as inferred from studying energy loss of energetic probes via the gauge/gravity duality. We embed this hybrid model into a model for the production and expansion of hot QCD matter produced in heavy ion collisions and confront it to high energy jet data at the LHC. We also confront the results of this model to the energy loss mechanism dominant at weak coupling.
Daniel Pablos (Universitat de Barcelona) Doga Can Gulhan (Massachusetts Inst. of Technology (US)) Guilherme Teixeira De Almeida Milhano (Universidade de Santiago de Compostela (ES)) Jorge Casalderrey Solana (University of Barcelona (ES)) Krishna Rajagopal (Massachusetts Inst. of Technology (US))