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Chiral magnetic effect reveals the topology of gauge fields in heavy-ion collisions

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arxiv 2102.06623 v1 pith:52H5CIXP submitted 2021-02-12 hep-ph cond-mat.str-elhep-thnucl-exnucl-th

Chiral magnetic effect reveals the topology of gauge fields in heavy-ion collisions

classification hep-ph cond-mat.str-elhep-thnucl-exnucl-th
keywords topologicalasymmetrychiralcollisionsheavy-ionmagnetictransitionsvacuum
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The topological structure of vacuum is the cornerstone of non-Abelian gauge theories describing strong and electroweak interactions within the standard model of particle physics. However, transitions between different topological sectors of the vacuum (believed to be at the origin of the baryon asymmetry of the Universe) have never been observed directly. An experimental observation of such transitions in Quantum Chromodynamics (QCD) has become possible in heavy-ion collisions, where the chiral magnetic effect converts the chiral asymmetry (generated by topological transitions in hot QCD matter) into an electric current, under the presence of the magnetic field produced by the colliding ions. The Relativistic Heavy Ion Collider program on heavy-ion collisions such as the Zr-Zr and Ru-Ru isobars, thus has the potential to uncover the topological structure of vacuum in a laboratory experiment. This discovery would have far-reaching implications for the understanding of QCD, the origin of the baryon asymmetry in the present-day Universe, and for other areas, including condensed matter physics.

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Cited by 5 Pith papers

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