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arXiv 2005.03125hep-thhep-lathep-ph
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强磁场中的电弱Sphaleron

The Electroweak Sphaleron in a strong magnetic field

David L. -J. Ho, Arttu Rajantie

摘要:

在外部磁场中,电弱sphaleron的能量--代表重子和轻子数破坏的能量势垒--减少,但保持非零,直到由希格斯质量和电荷设置的上Ambjorn-Olesen临界场强,在那里它消失。我们证明了这一点,通过数值计算的sphaleron配置中存在的外部磁场,在整个范围内的磁场强度,直到能量势垒消失。我们讨论了早期宇宙中重子生成的意义,以及在重离子碰撞中观测重子和轻子数破坏的可能性。

英文摘要:

In an external magnetic field, the energy of the electroweak sphaleron---representing the energy barrier to baryon and lepton number violation---decreases but remains nonzero until the upper Ambjorn-Olesen critical field strength set by the Higgs mass and the electric charge, where it vanishes. We demonstrate this by numerically computing the sphaleron configuration in the presence of an external magnetic field, over the full range of field strengths until the energy barrier vanishes. We discuss the implications for baryogenesis in the early universe, and the possibility of observing of baryon and lepton number violation in heavy-ion collisions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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