引力基本参数的近期变化及其意义
Recent variations of fundamental parameters and their implications for gravitation
摘要：
我们比较的灵敏度，最近的约束的精细结构常数的时间变化的光学时钟与时间变化的基本常数从原子钟敏感的电子-质子质量比的界限，从陨石的放射性衰变率，并从欧克陆天然反应堆。弱等效原理的检验也导致了常数随时间变化的可比界限，以及对跟踪引力势的变化的最强限制。对于最近的时间变化，“灵敏度的赢家”取决于粒子物理学的标准模型中不同耦合的变化之间的可能关系。WEP测试是目前最敏感的场景与规范的相互作用的统一。对原子钟时间变化的检测将有利于动态暗能量，并对宇宙学标量场的动力学产生强有力的约束。
英文摘要：
We compare the sensitivity of a recent bound on time variation of the fine structure constant from optical clocks with bounds on time varying fundamental constants from atomic clocks sensitive to the electron-to-proton mass ratio, from radioactive decay rates in meteorites, and from the Oklo natural reactor. Tests of the Weak Equivalence Principle also lead to comparable bounds on present time variations of constants, as well as putting the strongest limits on variations tracking the gravitational potential. For recent time variations, the "winner in sensitivity" depends on possible relations between the variations of different couplings in the standard model of particle physics. WEP tests are currently the most sensitive within scenarios with unification of gauge interactions. A detection of time variation in atomic clocks would favour dynamical dark energy and put strong constraints on the dynamics of a cosmological scalar field.
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