Cline J M, Kainulainen K
Physics Department, McGill University, 3600 University Street, Montréal, Québec, Canada H3A 2T8.
Phys Rev Lett. 2000 Dec 25;85(26 Pt 1):5519-22. doi: 10.1103/PhysRevLett.85.5519.
One of the most experimentally testable explanations for the origin of the baryon asymmetry of the Universe is that it was created during the electroweak phase transition, in the minimal supersymmetric standard model. Previous efforts have focused on the current for the difference of the two Higgsino fields, H1-H2, as the source of biasing sphalerons to create the baryon asymmetry. We point out that the current for the orthogonal linear combination, H1+H2, is larger by several orders of magnitude. Although this increases the efficiency of electroweak baryogenesis, we nevertheless find that large CP-violating angles > or = 0.15 are required to get a large enough baryon asymmetry.
对于宇宙重子不对称性起源，最具实验可检验性的解释之一是，它是在弱电相变过程中，在最小超对称标准模型中产生的。此前的研究工作主要聚焦于两个希格斯微子场（H1 - H2）的电流差，将其作为使斯费勒龙产生偏向从而创造重子不对称性的源头。我们指出，正交线性组合（H1 + H2）的电流要大几个数量级。尽管这提高了弱电重子生成的效率，但我们仍然发现，需要大于或等于0.15的大CP破坏角才能获得足够大的重子不对称性。
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