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Magnetogenesis from a rotating scalar: à la scalar chiral magnetic effect

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Title
Magnetogenesis from a rotating scalar: à la scalar chiral magnetic effect
Author(s)
Kohei Kamada; Chang Sub Shin
Subject
Beyond Standard Model, ; Cosmology of Theories beyond the SM, ; Supersymmetric Standard Model
Publication Date
2020-04
Journal
JOURNAL OF HIGH ENERGY PHYSICS, v.2020, no.4, pp.185
Publisher
SPRINGER
Abstract
© 2020, The Author(s). The chiral magnetic effect (CME) is a phenomenon in which an electric current is induced parallel to an external magnetic field in the presence of chiral asymmetry in a fermionic system. In this paper, we show that the electric current induced by the dynamics of a pseudo-scalar field which anomalously couples to electromagnetic fields can be interpreted as closely analogous to the CME. In particular, the velocity of the pseudo-scalar field, which is the phase of a complex scalar, indicates that the system carries a global U(1) number asymmetry as the source of the induced current. We demonstrate that an initial kick to the phase-field velocity and an anomalous coupling between the phase-field and gauge fields are naturally provided, in a set-up such as the Affleck-Dine mechanism. The resulting asymmetry carried by the Affleck-Dine field can give rise to instability in the (electro)magnetic field. Cosmological consequences of this mechanism are also investigated
URI
https://pr.ibs.re.kr/handle/8788114/8669
DOI
10.1007/JHEP04(2020)185
ISSN
1029-8479
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > 1. Journal Papers (저널논문)
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