标题： 非相互作用的暗物质 显示英文标题

标题： Noninteracting dark matter

摘要： 由于一个可接受的暗物质候选者可能仅与普通物质和辐射弱相互作用，因此考虑暗物质仅通过引力与其自身相互作用的极限情况是有意义的，这种物质是通过宇宙暴胀结束时的引力粒子产生而产生的。 我们利用当前暗物质密度的限制和热宇宙背景辐射中的大尺度波动来约束一个自相互作用势的两个参数，该势能是单个标量暗物质场的二次项和四次项之和，并且该场与引力最小耦合。 在本质上暴胀中，暴胀结束时的温度相对较低，该场相对较晚开始表现得像冷暗物质，即在物质和辐射密度相等的时代之前不久。 这可能对星系形成产生可观测的影响。 我们回应了对本质暴胀场景的最近批评，因为这些问题也适用于非相互作用暗物质图景中的某些方面。 显示英文摘要

摘要： Since an acceptable dark matter candidate may interact only weakly with ordinary matter and radiation, it is of interest to consider the limiting case where the dark matter interacts only with gravity and itself, the matter originating by the gravitational particle production at the end of inflation. We use the bounds on the present dark mass density and the measured large-scale fluctuations in the thermal cosmic background radiation to constrain the two parameters in a self-interaction potential that is a sum of quadratic and quartic terms in a single scalar dark matter field that is minimally coupled to gravity. In quintessential inflation, where the temperature at the end of inflation is relatively low, the field starts acting like cold dark matter relatively late, shortly before the epoch of equal mass densities in matter and radiation. This could have observable consequences for galaxy formation. We respond to recent criticisms of the quintessential inflation scenario, since these issues also apply to elements of the noninteracting dark matter picture.