Cumulants and nonlinear response of high pT harmonic flow at s NN =5.02 TeV CUMULANTS and NONLINEAR RESPONSE of HIGH ... JACQUELYN NORONHA-HOSTLER et al.

Jacquelyn Noronha-Hostler, Barbara Betz, Miklos Gyulassy, Matthew Luzum, Jorge Noronha, Israel Portillo, Claudia Ratti

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Event-by-event fluctuations caused by quantum mechanical fluctuations in the wave function of colliding nuclei in ultrarelativistic heavy ion collisions were recently shown to be necessary for the simultaneous description of RAA as well as the elliptic and triangular flow harmonics at high pT in PbPb collisions at the Large Hadron Collider (LHC). In fact, the presence of a finite triangular flow as well as cumulants of the flow harmonic distribution that differ from the mean are only possible when these event-by-event fluctuations are considered. In this paper we combine event-by-event viscous hydrodynamics and jet quenching to make predictions for high pTRAA, v2{2}, v3{2}, and v2{4} in PbPb collisions at sNN=5.02 TeV. With an order of magnitude larger statistics we find that high pT elliptic flow does not scale linearly with the soft elliptical flow, as originally thought, but has deviations from perfectly linear scaling. A new experimental observable, which involves the difference between the ratio of harmonic flow cumulants at high and low pT, is proposed to investigate the fluctuations of high pT flow harmonics and measure this nonlinear response. By varying the path length dependence of the energy loss and the viscosity of the evolving medium we find that RAA(pT) and v2{2}(pT) strongly depend on the choice for the path length dependence of the energy loss, which can be constrained using the new LHC run 2 data.

Original languageEnglish (US)
Article number044901
JournalPhysical Review C
Volume95
Issue number4
DOIs
StatePublished - Apr 3 2017

Fingerprint

harmonics
energy dissipation
collisions
ionic collisions
quenching
hydrodynamics
statistics
wave functions
viscosity
deviation
scaling
nuclei
predictions

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

Noronha-Hostler, Jacquelyn ; Betz, Barbara ; Gyulassy, Miklos ; Luzum, Matthew ; Noronha, Jorge ; Portillo, Israel ; Ratti, Claudia. / Cumulants and nonlinear response of high pT harmonic flow at s NN =5.02 TeV CUMULANTS and NONLINEAR RESPONSE of HIGH ... JACQUELYN NORONHA-HOSTLER et al. In: Physical Review C. 2017 ; Vol. 95, No. 4.
@article{403692e625384d0a9ec0024f80668cd6,
title = "Cumulants and nonlinear response of high pT harmonic flow at s NN =5.02 TeV CUMULANTS and NONLINEAR RESPONSE of HIGH ... JACQUELYN NORONHA-HOSTLER et al.",
abstract = "Event-by-event fluctuations caused by quantum mechanical fluctuations in the wave function of colliding nuclei in ultrarelativistic heavy ion collisions were recently shown to be necessary for the simultaneous description of RAA as well as the elliptic and triangular flow harmonics at high pT in PbPb collisions at the Large Hadron Collider (LHC). In fact, the presence of a finite triangular flow as well as cumulants of the flow harmonic distribution that differ from the mean are only possible when these event-by-event fluctuations are considered. In this paper we combine event-by-event viscous hydrodynamics and jet quenching to make predictions for high pTRAA, v2{2}, v3{2}, and v2{4} in PbPb collisions at sNN=5.02 TeV. With an order of magnitude larger statistics we find that high pT elliptic flow does not scale linearly with the soft elliptical flow, as originally thought, but has deviations from perfectly linear scaling. A new experimental observable, which involves the difference between the ratio of harmonic flow cumulants at high and low pT, is proposed to investigate the fluctuations of high pT flow harmonics and measure this nonlinear response. By varying the path length dependence of the energy loss and the viscosity of the evolving medium we find that RAA(pT) and v2{2}(pT) strongly depend on the choice for the path length dependence of the energy loss, which can be constrained using the new LHC run 2 data.",
author = "Jacquelyn Noronha-Hostler and Barbara Betz and Miklos Gyulassy and Matthew Luzum and Jorge Noronha and Israel Portillo and Claudia Ratti",
year = "2017",
month = "4",
day = "3",
doi = "10.1103/PhysRevC.95.044901",
language = "English (US)",
volume = "95",
journal = "Physical Review C",
issn = "2469-9985",
publisher = "American Physical Society",
number = "4",

}

Cumulants and nonlinear response of high pT harmonic flow at s NN =5.02 TeV CUMULANTS and NONLINEAR RESPONSE of HIGH ... JACQUELYN NORONHA-HOSTLER et al. / Noronha-Hostler, Jacquelyn; Betz, Barbara; Gyulassy, Miklos; Luzum, Matthew; Noronha, Jorge; Portillo, Israel; Ratti, Claudia.

In: Physical Review C, Vol. 95, No. 4, 044901, 03.04.2017.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Cumulants and nonlinear response of high pT harmonic flow at s NN =5.02 TeV CUMULANTS and NONLINEAR RESPONSE of HIGH ... JACQUELYN NORONHA-HOSTLER et al.

AU - Noronha-Hostler, Jacquelyn

AU - Betz, Barbara

AU - Gyulassy, Miklos

AU - Luzum, Matthew

AU - Noronha, Jorge

AU - Portillo, Israel

AU - Ratti, Claudia

PY - 2017/4/3

Y1 - 2017/4/3

N2 - Event-by-event fluctuations caused by quantum mechanical fluctuations in the wave function of colliding nuclei in ultrarelativistic heavy ion collisions were recently shown to be necessary for the simultaneous description of RAA as well as the elliptic and triangular flow harmonics at high pT in PbPb collisions at the Large Hadron Collider (LHC). In fact, the presence of a finite triangular flow as well as cumulants of the flow harmonic distribution that differ from the mean are only possible when these event-by-event fluctuations are considered. In this paper we combine event-by-event viscous hydrodynamics and jet quenching to make predictions for high pTRAA, v2{2}, v3{2}, and v2{4} in PbPb collisions at sNN=5.02 TeV. With an order of magnitude larger statistics we find that high pT elliptic flow does not scale linearly with the soft elliptical flow, as originally thought, but has deviations from perfectly linear scaling. A new experimental observable, which involves the difference between the ratio of harmonic flow cumulants at high and low pT, is proposed to investigate the fluctuations of high pT flow harmonics and measure this nonlinear response. By varying the path length dependence of the energy loss and the viscosity of the evolving medium we find that RAA(pT) and v2{2}(pT) strongly depend on the choice for the path length dependence of the energy loss, which can be constrained using the new LHC run 2 data.

AB - Event-by-event fluctuations caused by quantum mechanical fluctuations in the wave function of colliding nuclei in ultrarelativistic heavy ion collisions were recently shown to be necessary for the simultaneous description of RAA as well as the elliptic and triangular flow harmonics at high pT in PbPb collisions at the Large Hadron Collider (LHC). In fact, the presence of a finite triangular flow as well as cumulants of the flow harmonic distribution that differ from the mean are only possible when these event-by-event fluctuations are considered. In this paper we combine event-by-event viscous hydrodynamics and jet quenching to make predictions for high pTRAA, v2{2}, v3{2}, and v2{4} in PbPb collisions at sNN=5.02 TeV. With an order of magnitude larger statistics we find that high pT elliptic flow does not scale linearly with the soft elliptical flow, as originally thought, but has deviations from perfectly linear scaling. A new experimental observable, which involves the difference between the ratio of harmonic flow cumulants at high and low pT, is proposed to investigate the fluctuations of high pT flow harmonics and measure this nonlinear response. By varying the path length dependence of the energy loss and the viscosity of the evolving medium we find that RAA(pT) and v2{2}(pT) strongly depend on the choice for the path length dependence of the energy loss, which can be constrained using the new LHC run 2 data.

UR - http://www.scopus.com/inward/record.url?scp=85017150405&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85017150405&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.95.044901

DO - 10.1103/PhysRevC.95.044901

M3 - Article

AN - SCOPUS:85017150405

VL - 95

JO - Physical Review C

JF - Physical Review C

SN - 2469-9985

IS - 4

M1 - 044901

ER -