Heavy flavor puzzle at LHC: a serendipitous interplay of jet suppression and fragmentation

Abstract

Both charged hadrons and D mesons are considered to be excellent probes of QCD matter created in ultra relativistic heavy ion collisions. Surprisingly, recent experimental observations at LHC show the same jet suppression for these two probes, which - contrary to pQCD expectations - may suggest similar energy losses for light quarks and gluons in QCD medium. We here use our recently developed energy loss formalism in a finite size dynamical QCD medium to analyze this phenomenon that we denote as the "heavy flavor puzzle at LHC". We show that this puzzle is a consequence of an unusual combination of the suppression and fragmentation patterns, and in fact does not require invoking the same energy loss for light partons. Furthermore, we show that this combination leads to a simple relationship between the suppressions of light hadrons and D mesons and the corresponding bare quark suppressions. Consequently, a coincidental matching of jet suppression and fragmentation allows considerably simplifying the interpretation of the corresponding experimental data.

4 pages, 5 figures

References in corpus (13)

• Global analysis of fragmentation functions for pions and kaons and their uncertainties
• A light-cone wavefunction approach to open heavy flavor dynamics in QCD matter
• Light quark energy loss in strongly-coupled N = 4 supersymmetric Yang-Mills plasma
• Collisional Energy Loss in a Finite Size QCD Matter
• Radiative energy loss in a finite dynamical QCD medium
• Gluon energy loss in the gauge-string duality
• Debye screening in strongly coupled N=4 supersymmetric Yang-Mills plasma
• Testing AdS/CFT Deviations from pQCD Heavy Quark Energy Loss with Pb+Pb at LHC
• Testing the theory of QGP-induced energy loss at RHIC and the LHC
• Nuclear modification of high transverse momentum particle production in p+A collisions at RHIC and LHC
• Electric and Magnetic Screening Masses at Finite Temperature from Generalized Polyakov-Line Correlations in Two-flavor Lattice QCD
• Conformal Holography of Bulk Elliptic Flow and Heavy Quark Quenching in Relativistic Heavy Ion Collisions
• An overview of heavy quark energy loss puzzle at RHIC

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