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Critical point particle number fluctuations from molecular dynamics

Volodymyr A. Kuznietsov
(
- BITP, Kiev and
- Taras Shevchenko U.
)
,
Oleh Savchuk
(
- BITP, Kiev and
- Frankfurt U., FIAS and
- Darmstadt, GSI
)
,
Mark I. Gorenstein
(
- BITP, Kiev and
- Frankfurt U., FIAS
)
,
Volker Koch
(
- LBNL, NSD
)
,
Volodymyr Vovchenko
(
- LBNL, NSD
)

Jan 20, 2022

16 pages

Published in:

Phys.Rev.C 105 (2022) 4, 044903

Published: Apr 12, 2022

e-Print:

2201.08486 [hep-ph]

DOI:

10.1103/PhysRevC.105.044903 (publication)

View in:

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Abstract: (APS)

We study fluctuations of particle number in the presence of a critical point by utilizing molecular dynamics simulations of the classical Lennard-Jones fluid in a periodic box. The numerical solution of the

N

-body problem naturally incorporates all correlations, exact conservation laws, and finite size effects, allowing us to study the fluctuation signatures of the critical point in a dynamical setup. We find that large fluctuations associated with the critical point are observed when measurements are performed in coordinate subspace, but, in the absence of collective flow and expansion, are essentially washed out when momentum cuts are imposed instead. We put our findings in the context of event-by-event fluctuations in heavy-ion collisions.

Note:

16 pages, 9 figures, to be published in Physical Review C

molecular dynamics
Lennard-Jones potential
critical fluctuations
particle number: fluctuation
particle flow: collective phenomena
finite size: effect
heavy ion: scattering
critical phenomena
correlation
collective

References(47)

Figures(9)

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