论文标题
扰动量子重力中的鳞状衰减
Scalaron Decay in Perturbative Quantum Gravity
论文作者
论文摘要
某个二次重力模型提供了一种成功的通货膨胀情况。通货膨胀是由称为Scalaron的新标量自由度驱动的。通货膨胀结束后，标量在物质和暗物质的自由度上腐烂，将宇宙加热。我们研究标量可以将能量转移到物质部门的新渠道。这些通道是通过中间重力态歼灭和腐烂的。结果是在扰动量子重力内获得的。在重型标量极限中，只有标量颗粒由歼灭通道产生。允许所有类型的颗粒中的标量腐烂。在光标度量极限中，衰减通道被强烈抑制。预计在加热的早期阶段，通过歼灭通道的玻色子产量将是主导的，而费米昂的生产将在以后的阶段中占主导地位。
A certain quadratic gravity model provides a successfully inflationary scenario. The inflation is driven by the new scalar degree of freedom called scalaron. After the end of inflation the scalaron decays in matter and dark matter degrees of freedom reheating the Universe. We study new channels by which the scalaron can transfer energy to the matter sector. These channels are annihilation and decay via intermediate graviton states. Results are obtained within perturbative quantum gravity. In the heavy scalaron limit only scalar particles are produced by the annihilation channel. Scalaron decays in all types of particles are allowed. In the light scalaron limit decay channel is strongly suppressed. Boson production via the annihilation channel is expected to be dominant at the early stages of reheating, while fermion production will dominate later stages.
