WIMP暗物质存在时中子星性质的GW170817约束
GW170817 constraints on the properties of a neutron star in the presence of WIMP dark matter
摘要：
研究了暗物质存在时中子星的性质。我们已经考虑了一个相对较轻的弱相互作用大质量粒子（WIMP）作为暗物质的候选者，其性质由DAMA/LIBRA合作的结果所建议，例如在次最小超对称标准模型的框架内实现。暗物质粒子通过希格斯玻色子与中子星的重子物质相互作用。使用DAMA/LIBRA实验的结果，暗物质变量基本上是固定的，然后使用它来建立中子星内部WIMP-核子相互作用的拉格朗日密度。我们利用有效场论驱动的相对论平均场模型研究了暗物质存在时的物态方程。将预测的状态方程应用于Tolman-Oppenheimer-Schmidoff方程中，得到了质量-半径关系、转动惯量以及潮汐场对中子星的影响。计算的性质与GW 170817事件的相应数据进行了比较。
英文摘要：
The properties of a neutron star are studied in the presence of dark matter. We have considered a relatively light Weakly Interacting Massive Particle (WIMP) as a dark matter candidate with properties suggested by the results of the DAMA/LIBRA collaboration, realized for instance within the framework of the Next-to-Minimal Supersymmetric Standard Model. The dark matter particle interacts with the baryonic matter of a neutron star through Higgs bosons. The dark matter variables are essentially fixed using the results of the DAMA/LIBRA experiment, which are then used to build the Lagrangian density for the WIMP-nucleon interaction inside a neutron star. We have used the effective field theory motivated relativistic mean field model to study the equations-of-state in the presence of dark matter. The predicted equations-of-state are used in the Tolman-Oppenheimer-Volkoff equations to obtain the mass-radius relations, the moment of inertia, and effects of the tidal field on a neutron star. The calculated properties are compared with the corresponding data of the GW170817 event.
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