Chiral magnetic effect (CME) at low temperature from instanton vacuum

Details Chiral magnetic effect (CME) at low temperature from instanton vacuum Chiral magnetic effect (CME) at low temperature from instanton vacuum

2009-12-10

arxiv.org/abs/0912.1933v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 4 figures, Talk given at the international workshop "Hadron and Nuclear Physics" (HNP2009), 16~19 Nov 2009, Osaka, J

Scientific paper

In this talk, we report our present work on the chiral magnetic effect (CME) under a strong magnetic field at low temperature. To this end, we use the instanton vacuum with the finite instanton-number fluctuation Delta, which relates to the nontrivial topological charge Q_t. We compute the vacuum expectation values of the local chiral density , chiral charge density and induced electromagnetic current . We observed that the longitudinal EM current is much larger than the transverse one, |j_perp/j_parallel| ~ Q_t, and the equals to the ||. It also turns out that the CME becomes insensitive to the magnetic field as T increases, since the instanton effect decreases.

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