Collective flow and fluid behavior in p/d/$^{3}$He+Au collisions at ${ \sqrt{\boldsymbol s_{\boldsymbol NN}} \bf = 200}$ GeV* - INSPIRE

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Collective flow and fluid behavior in p/d/ $^{3}$ He+Au collisions at ${ \sqrt{\boldsymbol s_{\boldsymbol NN}} \bf = 200}$ GeV*

Zeming Wu
(
- Peking U. and
- CICQM, Beijing
)
,
Baochi Fu
(
- Peking U. and
- CICQM, Beijing and
- Peking U., CHEP
)
,
Shujun Zhao
(
- Peking U. and
- CICQM, Beijing
)
,
Runsheng Liu
(
- Peking U. and
- CICQM, Beijing
)
,
Huichao Song
(
- Peking U. and
- CICQM, Beijing and
- Peking U., CHEP
)

Jul 6, 2023

8 pages

Published in:

Chin.Phys.C 48 (2024) 10, 104102

Published: 2024

e-Print:

2307.02995 [nucl-th]

DOI:

10.1088/1674-1137/ad5ae8

View in:

ADS Abstract Service

reference search3 citations

Citations per year

Abstract: (IOP)

By varying the intrinsic initial geometry, p/d/

^{3}

He+Au collisions at the Relativistic Heavy Ion Collider (RHIC) provide a unique opportunity to understand the collective behavior and probe possible sub-nucleon fluctuations in small systems. In this study, we employed the hybrid model

{\mathrm{iEBE-VISHNU}}

under TRENTo initial conditions to study the collective flow and fluid behavior in p/d/

^{3}

He+Au collisions. With fine-tuned parameters,

{\mathrm{iEBE-VISHNU}}

can describe the

v_2(p_T)

and

v_3(p_T)

data from the PHENIX and STAR collaborations. However, for certain parameter sets with initial sub-nucleon fluctuations, the hydrodynamic simulations already go beyond their limits with an average Knudsen number

\langle K_n \rangle

clearly larger than unity. Our calculations demonstrate that, for a meaningful evaluation of the fluid behavior in small systems, model simulations must also pay attention to the validity range of hydrodynamics.

heavy-ion collisions
hydrodynamics
collective flow
particle flow: collective phenomena
heavy ion: scattering
model: hybrid
fluid
STAR
hydrodynamics
boundary condition

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