TY  - JOUR
AU  - Francis, A.
AU  - Kaczmarek, O.
AU  - Laine, M.
AU  - Neuhaus, T.
AU  - Ohno, H.
TI  - Nonperturbative estimate of the heavy quark momentum diffusion coefficient
JO  - Physical review / D
VL  - 92
IS  - 11
SN  - 1550-7998
CY  - [S.l.]
PB  - Soc.
M1  - FZJ-2015-07582
SP  - 116003
PY  - 2015
AB  - We estimate the momentum diffusion coefficient of a heavy quark within a pure SU(3) plasma at a temperature of about 1.5Tc. Large-scale Monte Carlo simulations on a series of lattices extending up to 1923×48 permit us to carry out a continuum extrapolation of the so-called color-electric imaginary-time correlator. The extrapolated correlator is analyzed with the help of theoretically motivated models for the corresponding spectral function. Evidence for a nonzero transport coefficient is found and, incorporating systematic uncertainties reflecting model assumptions, we obtain κ=(1.8–3.4)T3. This implies that the “drag coefficient,” characterizing the time scale at which heavy quarks adjust to hydrodynamic flow, is η−1D=(1.8–3.4)(Tc/T)2(M/1.5  GeV)  fm/c, where M is the heavy quark kinetic mass. The results apply to bottom and, with somewhat larger systematic uncertainties, to charm quarks.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000366096200006
DO  - DOI:10.1103/PhysRevD.92.116003
UR  - https://juser.fz-juelich.de/record/279700
ER  -