My paper with Davide Pedrotti, Jun-Qian Jiang, Luis Escamilla, and Simony Santos da Costa, where we discuss the multidimensionality of the Hubble tension and the roles of Ωm and ωc (see this earlier news item), has now officially been published in PRD! The full bibliographic coordinates for the paper are Phys. Rev. D 111 (2025) 023506. Here is the link to the paper.
Hubble tension, Ωm, and ωc paper accepted in PRD!
My paper with Davide Pedrotti, Jun-Qian Jiang, Luis Escamilla, and Simony Santos da Costa, where we discuss the multidimensionality of the Hubble tension and the roles of Ωm and ωc (see this earlier news item), has been accepted for publication in PRD! There were extremely minor revisions compared to the earlier version, which have resulted in a clearer discussion of the novel aspects and the domain of applicability of our results. You can read the preprint version of the paper on arXiv: 2408.04530.
Hubble tension, Ωm, and ωc
A very busy week, with another paper produced almost entirely within my group, just in time for wrapping up for holidays! With Davide Pedrotti, Jun-Qian Jiang, Luis Escamilla, and Simony Santos da Costa, we argue that the Hubble tension is inherently multidimensional, and that the matter density parameter Ωm and cold dark matter physical density ωc play key roles. In particular, we analytically explained why any model aiming to solve the Hubble tension will inevitably lead to an increase in ωc (because both Ωm and ωb are precisely calibrated by BAO and/or SNeIa, and BBN respectively) and, by extension, S8 (with potential problems for the S8 discrepancy), and explicitly verified that this holds on real data. We then argued that if cosmologists interested in solving the Hubble tension could ask for just one present from Father Christmas…well, then they really should wish to know the value of Ωm chosen by Nature - or, in practical terms, they should wish for a calibration of Ωm which is as reliable and model-independent as possible, and we put forward some ideas on how to achieve this. You can read our results in the preprint we just posted on arXiv: 2408.04530.
