Baryon asymmetry from hypermagnetic helicity in dilaton hypercharge electromagnetism
Baryon asymmetry from hypermagnetic helicity in dilaton hypercharge electromagnetism
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DOI：
10.1103/physrevd.74.123504
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发表时间：
2006-11
影响因子：
5
通讯作者：
K. Bamba
中科院分区：
文献类型：
--
作者：
K. Bamba
在暴涨宇宙学中研究了超磁螺旋性产生的宇宙重子不对称性，其物理解释是根据超磁结给出的，考虑到通过与膨胀子和赝标量场的耦合破坏超荷电磁场的共形不变性。结果表明，如果电弱相变是强一阶的，并且在水平尺度上产生的磁场的当前幅度足够大，则可以产生具有足够幅度的重子不对称性，以解释观测到的重子与熵之比。
The generation of the baryon asymmetry of the Universe from the hypermagnetic helicity, the physical interpretation of which is given in terms of hypermagnetic knots, is studied in inflationary cosmology, taking into account the breaking of the conformal invariance of hypercharge electromagnetic fields through both a coupling with the dilaton and with a pseudoscalar field. It is shown that, if the electroweak phase transition is strongly first order and the present amplitude of the generated magnetic fields on the horizon scale is sufficiently large, a baryon asymmetry with a sufficient magnitude to account for the observed baryon-to-entropy ratio can be generated.