TY - JOUR
T1 - Event-by-Event Hydrodynamics+Jet Energy Loss
T2 - A Solution to the RAA - V2 Puzzle
AU - Noronha-Hostler, Jacquelyn
AU - Betz, Barbara
AU - Noronha, Jorge
AU - Gyulassy, Miklos
N1 - Funding Information:
We thank G.S. Denicol, M. Luzum, S. Mohapatra, A. Timmins, W. Li, and J. Liao for discussions. J.N.H. was supported by the University of Houston. B.B. acknowledges support from the Bundesministerium fur Bildung und Forschung and the Helmholtz International Center for FAIR. J.N.H. and M.G. were supported in part by US-DOE Nuclear Science Grant No.DE-FG02-93ER40764. M.G. also acknowledges partial support by the IOPP, CCNU, Wuhan, China. J.N. thanks the University of Houston for its hospitality and Fundacao de Amparo Pesquisa do Estado de Sao Paulo (FAPESP) and Conselho Nacional de Desenvolvimento Cientafico e Tecnolagico (CNPq) for support.
PY - 2016/6/21
Y1 - 2016/6/21
N2 - High pT>10 GeV elliptic flow, which is experimentally measured via the correlation between soft and hard hadrons, receives competing contributions from event-by-event fluctuations of the low-pT elliptic flow and event-plane angle fluctuations in the soft sector. In this Letter, a proper account of these event-by-event fluctuations in the soft sector, modeled via viscous hydrodynamics, is combined with a jet-energy-loss model to reveal that the positive contribution from low-pT v2 fluctuations overwhelms the negative contributions from event-plane fluctuations. This leads to an enhancement of high-pT>10 GeV elliptic flow in comparison to previous calculations and provides a natural solution to the decade-long high-pT RAA - v2 puzzle. We also present the first theoretical calculation of high-pT v3, which is shown to be compatible with current LHC data. Furthermore, we discuss how short-wavelength jet-medium physics can be deconvoluted from the physics of soft, bulk event-by-event flow observables using event-shape engineering techniques.
AB - High pT>10 GeV elliptic flow, which is experimentally measured via the correlation between soft and hard hadrons, receives competing contributions from event-by-event fluctuations of the low-pT elliptic flow and event-plane angle fluctuations in the soft sector. In this Letter, a proper account of these event-by-event fluctuations in the soft sector, modeled via viscous hydrodynamics, is combined with a jet-energy-loss model to reveal that the positive contribution from low-pT v2 fluctuations overwhelms the negative contributions from event-plane fluctuations. This leads to an enhancement of high-pT>10 GeV elliptic flow in comparison to previous calculations and provides a natural solution to the decade-long high-pT RAA - v2 puzzle. We also present the first theoretical calculation of high-pT v3, which is shown to be compatible with current LHC data. Furthermore, we discuss how short-wavelength jet-medium physics can be deconvoluted from the physics of soft, bulk event-by-event flow observables using event-shape engineering techniques.
UR - http://www.scopus.com/inward/record.url?scp=84977649926&partnerID=8YFLogxK
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U2 - 10.1103/PhysRevLett.116.252301
DO - 10.1103/PhysRevLett.116.252301
M3 - Article
C2 - 27391718
AN - SCOPUS:84977649926
VL - 116
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 25
M1 - 252301
ER -