Journal Article

PUBDB-2021-03886

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Numerical study of the chiral separation effect in two-color QCD at finite density

Buividovich, P. V. ; Smith, D. ; von Smekal, L.

2021
Inst. Melville, NY

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Please use a persistent id in citations: doi:10.1103/PhysRevD.104.014511  doi:10.3204/PUBDB-2021-03886

Report No.: arXiv:2012.05184

Abstract: We study the chiral separation effect (CSE) in finite-density SU(2) lattice gauge theory with dynamical quarks. We find that the CSE is well described by the free quark result in the high-temperature quark-gluon plasma phase. As one enters the confinement regime with broken chiral symmetry at chemical potential smaller than half of the pion mass, the CSE response is gradually suppressed toward low temperatures in comparison to the free quark result. This suppression can be approximately described by assuming that the CSE current is proportional to the charge density, rather than the chemical potential, as suggested in the literature [Phys. Rev. D 97, 085020 (2018). We also provide an upper bound on the contribution of disconnected fermionic diagrams to the CSE, which is consistent with zero within our statistical errors and small compared to that of the connected diagrams. Our results are obtained mainly in the QCD-like regime of SU(2) gauge theory at low densities, and hence should be at least qualitatively applicable to QCD as well.

Keyword(s): potential: chemical ; spontaneous symmetry breaking: chiral ; symmetry: chiral ; charge: density ; density: finite ; density: low ; gauge field theory: SU(2) ; diquark: condensation ; quark gluon: plasma ; error: statistical ; temperature: low ; pi: mass ; suppression ; quantum chromodynamics ; lattice field theory ; critical phenomena ; quark

Note: Phys. Rev. D 104, 014511 (2021). v2: published version, 10 pages RevTeX, 6 figures

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Research Program(s):

1. CREMLINplus - Connecting Russian and European Measures for Large-scale Research Infrastructures - plus (871072) (871072)

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Buividovich, P. V. ; Smith, D. ; Von Smekal, L.
Numerical study of the chiral separation effect in two-color QCD at finite density
[10.3204/PUBDB-2021-03456]     Files  Fulltext Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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