CosmoBit：用于计算宇宙学观测值和似然性的GAMBIT模块
CosmoBit: A GAMBIT module for computing cosmological observables and likelihoods
摘要：
我们介绍$\sf{CosmoBit}$，一个模块内的开源$\sf{GAMBIT}$软件框架，探索宇宙学和粒子物理学之间的连接与联合全球适合。$\sf{CosmoBit}$为研究$Λ$ CDM之外的各种场景提供了一个灵活的框架，例如暴胀模型，相对论自由度的有效数量的修改，来自湮灭或衰变暗物质的奇异能量注入，以及基本粒子（如中微子质量和中子寿命）性质的变化。$\sf{CosmoBit}$中的许多可观测量和似然性是通过$\sf{AlterBBN}$、$\sf{CLASS}$、$\sf{DarkAges}$、$\sf{MontePython}$、$\sf{MultiModeCode}$和$\sf{plc}$的接口计算的。这使得有可能应用大尺度结构，Ia型超新星，大爆炸核合成和宇宙微波背景的广泛约束。参数扫描可以使用$\sf{GAMBIT}$框架内可用的许多不同的统计采样算法来执行，并且结果可以与专注于粒子物理和暗物质的其他$\sf{GAMBIT}$模块的计算相结合。我们包括广泛的验证图和第一个应用程序的情况下，非标准的相对论自由度和中微子温度，表明中微子质量的总和相应的约束比在标准的情况下弱得多。
英文摘要：
We introduce $\sf{CosmoBit}$, a module within the open-source $\sf{GAMBIT}$ software framework for exploring connections between cosmology and particle physics with joint global fits. $\sf{CosmoBit}$ provides a flexible framework for studying various scenarios beyond $Λ$CDM, such as models of inflation, modifications of the effective number of relativistic degrees of freedom, exotic energy injection from annihilating or decaying dark matter, and variations of the properties of elementary particles such as neutrino masses and the lifetime of the neutron. Many observables and likelihoods in $\sf{CosmoBit}$ are computed via interfaces to $\sf{AlterBBN}$, $\sf{CLASS}$, $\sf{DarkAges}$, $\sf{MontePython}$, $\sf{MultiModeCode}$, and $\sf{plc}$. This makes it possible to apply a wide range of constraints from large-scale structure, Type Ia supernovae, Big Bang Nucleosynthesis and the cosmic microwave background. Parameter scans can be performed using the many different statistical sampling algorithms available within the $\sf{GAMBIT}$ framework, and results can be combined with calculations from other $\sf{GAMBIT}$ modules focused on particle physics and dark matter. We include extensive validation plots and a first application to scenarios with non-standard relativistic degrees of freedom and neutrino temperature, showing that the corresponding constraint on the sum of neutrino masses is much weaker than in the standard scenario.
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