Baryogenesis at low reheating temperatures
Baryogenesis at low reheating temperatures
复制标题
低再加热温度下的重子生成
DOI：
10.1103/physrevlett.84.4284
复制
发表时间：
2000
影响因子：
8.6
通讯作者：
A. Riotto
中科院分区：
文献类型：
--
作者：
S. Davidson;M. Losada;A. Riotto
我们注意到，重新加热期间的最高温度可能远远高于宇宙变得以辐射为主的重新加热温度T(R)。我们证明了标准模型反常(B+L)破坏过程可以在小于1GeV，相似的T(R)<；100GeV时处于热平衡状态。弱电重子发生是可行的，而传统的希格斯质量上限由于重子不对称性的要求而被放宽。或者，重子的不对称性可以通过由Affleck-Dine机制产生的(B-L)不对称性，或者从B-L=0宇宙中e(R)和e(L)之间的手征不对称性来重新处理。
We note that the maximum temperature during reheating can be much greater than the reheating temperature T(r) at which the universe becomes radiation dominated. We show that the standard model anomalous (B+L)-violating processes can therefore be in thermal equilibrium for 1 GeV less, similarT(r)<<100 GeV. Electroweak baryogenesis could work and the traditional upper bound on the Higgs mass coming from the requirement of the preservation of the baryon asymmetry may be relaxed. Alternatively, the baryon asymmetry may be reprocessed by sphaleron transitions either from a (B-L) asymmetry generated by the Affleck-Dine mechanism or from a chiral asymmetry between e(R) and e(L) in a B-L = 0 universe.