A study of vorticity formation in high energy nuclear collisions - INSPIRE

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A study of vorticity formation in high energy nuclear collisions

F. Becattini
(
- Florence U. and
- INFN, Florence
)
,
G. Inghirami
(
- Frankfurt U., FIAS and
- Florence U.
)
,
V. Rolando
(
- Ferrara U. and
- INFN, Ferrara
)
,
A. Beraudo
(
- INFN, Turin
)
,
L. Del Zanna
(
- Florence U. and
- INFN, Florence and
- Arcetri Observ.
)

Jan 19, 2015

13 pages

Published in:

Eur.Phys.J.C 75 (2015) 9, 406,
Eur.Phys.J.C 78 (2018) 5, 354 (erratum)

Published: Sep 3, 2015

e-Print:

1501.04468 [nucl-th]

DOI:

10.1140/epjc/s10052-015-3624-1,
10.1140/epjc/s10052-018-5810-4 (erratum)

View in:

ADS Abstract Service

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Abstract: (Springer)

We present a quantitative study of vorticity formation in peripheral ultrarelativistic heavy-ion collisions at

{\sqrt{s}_\mathrm{NN}}= 200

GeV by using the ECHO-QGP numerical code, implementing relativistic dissipative hydrodynamics in the causal Israel–Stewart framework in

3+1

dimensions with an initial Bjorken flow profile. We consider different definitions of vorticity which are relevant in relativistic hydrodynamics. After demonstrating the excellent capabilities of our code, which proves to be able to reproduce Gubser flow up to 8 fm/c, we show that, with the initial conditions needed to reproduce the measured directed flow in peripheral collisions corresponding to an average impact parameter

b=11.6

fm and with the Bjorken flow profile for a viscous Quark Gluon Plasma with

\eta /s=0.1

fixed, a vorticity of the order of some

10^{-2}\,c

/fm can develop at freeze-out. The ensuing polarization of

\Lambda

baryons does not exceed 1.4 % at midrapidity. We show that the amount of developed directed flow is sensitive to both the initial angular momentum of the plasma and its viscosity.

Note:

13 pages, 22 figures. Minor changes, final version to appear in EPJC

flow: Bjorken
hydrodynamics: relativistic
Lambda: polarization
quark gluon: plasma
nucleus: energy
energy: high
heavy ion: scattering
peripheral
viscosity
formation

References(33)

Figures(22)

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