标题： 粒子在振荡暴胀模型中的产生 显示英文标题

标题： Particle production in the oscillating inflation model

摘要： 我们研究了标量场$\chi$与暴胀场$\phi$($g^2\phi^2\chi^2/2$) 在{\it 振荡暴胀}模型中的粒子产生，该模型最近由Damour和Mukhanov提出。 尽管在振荡暴胀阶段标量场$\phi$的涨落可以被有效增强，但在考虑产生的粒子的反作用效应时，最大涨落会随着表示暴胀势能核心部分尺度的临界值$\phi_c$的减小而受到抑制。 对于$\chi$粒子产生，我们发现随着$\phi_c$的减小，需要更大的耦合常数$g$才能导致有效的参数共振，因为势能最小值处的暴胀子有效质量变得更大。 然而，有可能生成质量大于$10^{14}$GeV 的超重$\chi$粒子，这将对GUT重子生成产生重要后果。 显示英文摘要

摘要： We investigate the particle production of a scalar field $\chi$ coupled to an inflaton field $\phi$ ($g^2\phi^2\chi^2/2$) in the {\it oscillating inflation} model, which was recently proposed by Damour and Mukhanov. Although the fluctuation of the $\phi$ field can be effectively enhanced during a stage of the oscillating inflation, the maximum fluctuation is suppressed as the critical value $\phi_c$ which indicates the scale of the core part of the inflaton potential decreases, in taking into account the back reaction effect of created particles. As for the $\chi$ particle production, we find that larger values of the coupling constant $g$ are required to lead to an efficient parametric resonance with the decrease of $\phi_c$, because an effective mass of inflaton around the minimum of its potential becomes larger. However, it is possible to generate the superheavy $\chi$ particle whose mass is greater than $10^{14}$ GeV, which would result in an important consequence for the GUT baryogenesis.