曲率子衰变为重子、反重子和辐射
Curvaton Decay into Baryons, anti-Baryons and Radiation
摘要：
本文计算了曲率场衰变产生的重子/辐射等曲率涨落的量。特别指出，如果曲率衰变保持重子数不变，且曲率在衰变时支配能量密度，则初始曲率/辐射等曲率模完全转化为重子/辐射等曲率模.这种情况是相反的曲率衰变的三个流体模型中先前研究的，这种差异是有关的保存预先存在的重子不对称性和效率的湮灭的所有重子/反重子对产生的衰变。我们详细研究了曲率衰变保持或不保持重子数的相关情况，并对每种情况进行了分析和数值计算。
英文摘要：
This paper calculates the amount of baryon/radiation isocurvature fluctuation produced through the decay of a curvaton field. It is shown in particular that if curvaton decay preserves baryon number and the curvaton dominates the energy density at the time of decay, the initial curvaton/radiation isocurvature mode is entirely transfered into a baryon/radiation isocurvature mode. This situation is opposite to that previously studied in three fluid models of curvaton decay; this difference is related to the conservation of the pre-existing baryon asymmetry and to the efficiency of the annihilation of all baryon/anti-baryon pairs produced in the decay. We study in detail the relevant cases in which the curvaton decay preserves or not baryon number and provide analytical and numerical calculations for each situation.
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