TY - JOUR
T1 - Inationary dilaton-axion magnetogenesis
AU - Ng, Kin Wang
AU - Cheng, Shu Lin
AU - Lee, Wolung
N1 - Publisher Copyright:
© 2015 The physical society of the republic of China.
PY - 2015
Y1 - 2015
N2 - We discuss the generation of primordial magnetic fields during in ation in dilaton-axion electromagnetism, in which the dilaton and axion dynamics are introduced in terms of two time dependent functions of the cosmic scale factor, I(a)F2/4 and J(a)FF~/4, respectively, where F is the electromagnetic field strength and F~ is its dual. We study the form of J(a) that can generate a large seed magnetic field. Although the J(a) function is model dependent, the axion-photon coupling may open up a new window for a successful in ationary magnetogenesis.
AB - We discuss the generation of primordial magnetic fields during in ation in dilaton-axion electromagnetism, in which the dilaton and axion dynamics are introduced in terms of two time dependent functions of the cosmic scale factor, I(a)F2/4 and J(a)FF~/4, respectively, where F is the electromagnetic field strength and F~ is its dual. We study the form of J(a) that can generate a large seed magnetic field. Although the J(a) function is model dependent, the axion-photon coupling may open up a new window for a successful in ationary magnetogenesis.
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U2 - 10.6122/CJP.20150909
DO - 10.6122/CJP.20150909
M3 - Article
AN - SCOPUS:84952940991
SN - 0577-9073
VL - 53
JO - Chinese Journal of Physics
JF - Chinese Journal of Physics
IS - 6
M1 - 110105
ER -