Lattice QCD constraints on the critical point from an improved precision equation of state - INSPIRE

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Lattice QCD constraints on the critical point from an improved precision equation of state

Szabolcs Borsanyi
(
- Wuppertal U.
)
,
Zoltan Fodor
(
- Wuppertal U. and
- Penn State U. and
- Eotvos U. and
- IAS, Julich
)
,
Jana N. Guenther
(
- Wuppertal U.
)
,
Paolo Parotto
(
- Turin U.
)
,
Attila Pasztor
(
- Eotvos U.
)

Feb 14, 2025

13 pages

e-Print:

2502.10267 [hep-lat]

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Abstract: (arXiv)

In this Letter we employ lattice simulations to search for the critical point of quantum chromodynamics (QCD). We search for the onset of a first order QCD transition on the phase diagram by following contours of constant entropy density from imaginary to real chemical potentials under conditions of strangeness neutrality. We scan the phase diagram and investigate whether these contours meet to determine the probability that the critical point is located in a certain region on the

T-\mu_B

plane. To achieve this we introduce a new, continuum extrapolated equation of state at zero density with improved precision using lattices with

N_\tau=8,10,12,16

timeslices, and supplement it with new data at imaginary chemical potential. The current precision allows us to exclude, at the

2\sigma

level, the existence of a critical point at

\mu_B < 450

~MeV.

Note:

7 + 5 Pages with a Supplemental Material in the same file

References(74)

Figures(12)

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Massimo D'Elia
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)
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Attila Pasztor
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- Wuppertal U.
)
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Zoltan Fodor
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)
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Sandor D. Katz
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Volodymyr Vovchenko
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Owe Philipsen
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S. Borsányi
(
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)
,
Z. Fodor
(
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- Penn State U. and
- Eotvos U. and
- IAS, Julich
)
,
J.N. Guenther
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)
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)

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Resummed lattice QCD equation of state at finite baryon density: Strangeness neutrality and beyond

Szabolcs Borsanyi
(
- Wuppertal U.
)
,
Jana N. Guenther
(
- Wuppertal U.
)
,
Ruben Kara
(
- Wuppertal U.
)
,
Zoltan Fodor
(
- Penn State U. and
- Wuppertal U. and
- Eotvos U. and
- ZAT, Julich and
- UC, San Diego
)
,
Paolo Parotto
(
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)

et al.

- Phys.Rev.D 105 (2022) 11, 114504
•
e-Print:
- 2202.05574
•
DOI:
- 10.1103/PhysRevD.105.114504

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