CosmoBit: A GAMBIT module for computing cosmological observables and likelihoods
The GAMBIT Cosmology Workgroup: Janina J. Renk, Patrick St\"ocker,, Sanjay Bloor, Selim Hotinli, Csaba Bal\'azs, Torsten Bringmann, Tom\'as E., Gonzalo, Will Handley, Sebastian Hoof, Cullan Howlett, Felix Kahlhoefer, Pat, Scott, Aaron C. Vincent, Martin White

TL;DR
CosmoBit is a versatile GAMBIT module that enables comprehensive cosmological and particle physics joint analyses, integrating multiple observables and likelihoods for exploring beyond-ΛCDM models.
Contribution
It introduces a flexible, open-source framework within GAMBIT for studying diverse cosmological scenarios with integrated likelihoods and extensive validation.
Findings
Constraint on neutrino masses is weaker in non-standard scenarios.
Enables joint analysis of cosmological and particle physics data.
Supports a wide range of models beyond ΛCDM.
Abstract
We introduce , a module within the open-source software framework for exploring connections between cosmology and particle physics with joint global fits. provides a flexible framework for studying various scenarios beyond 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 are computed via interfaces to , , , , , and . This makes it possible to apply a wide range of constraints from large-scale structure, Type Ia supernovae, Big Bang Nucleosynthesis and the…
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