My paper with Davide Pedrotti, Luis Escamilla, Valerio Marra, and Leandros Perivolaropoulos, where we show that the “Hubble tension no-go theorem” forbidding purely post-recombination solutions is robust against a possible miscalibration of BAO measurements, while highlighting the very important role of unanchored SNeIa (see this earlier news item), has now officially been published in PRD, where it has been selected as an Editors’ Suggestion (see this earlier news item)! The full bibliographic coordinates for the paper are Phys. Rev. D 113 (2026) 043507. Here is the link to the paper (which is published Open Access).
BAO and Hubble tension no-go theorem paper selected as Editors' Suggestion in PRD!
My paper with Davide Pedrotti, Luis Escamilla, Valerio Marra, and Leandros Perivolaropoulos, on the implications of a possible BAO miscalibration for the Hubble tension (see this earlier news item), recently accepted for publication in PRD, has also been selected as an Editors’ Suggestion! These make up a small fraction of outstanding papers judged by PRD’s Editors as being particularly important, interesting, and well written, and are highlighted on the journals’ homepage. Great news for a paper which I do not hesitate to place among the top 3 most important papers I ever wrote!
BAO and Hubble tension no-go theorem paper accepted in PRD!
My paper with Davide Pedrotti, Luis Escamilla, Valerio Marra, and Leandros Perivolaropoulos, where we show that the “Hubble tension no-go theorem” forbidding purely post-recombination solutions is robust against a possible miscalibration of BAO measurements, while highlighting the very important role of unanchored SNeIa (see this earlier news item), has been accepted for publication in PRD! Compared to the earlier version there were very minor changes to Fig. 5 and Fig. 10. You can read the preprint version of our paper on arXiv: 2510.01974.
BAO and Hubble tension no-go theorem
I’m extremely excited to finally see my latest paper with Davide Pedrotti, Luis Escamilla, Valerio Marra, and Leandros Perivolaropoulos, finally out on the arXiv - kudos to Davide who did all the heavy-lifting in what I do not hesitate to place among the three most important papers I ever wrote! This paper is about what we could call the “Hubble tension no-go theorem”, which forbids purely post-recombination solutions due to the constraints BAO impose on the product of the sound horizon and the Hubble constant. However, the pipeline from which BAO measurements are obtained requires assuming a fiducial cosmological model, with the choice falling on ΛCDM: many have therefore wondered whether we can trust these measurements when testing late-time modifications to ΛCDM, and this is the most frequently invoked loophole to the no-go theorem. In this work we have played devil’s advocate and showed that, even if BAO measurements were to be grossly (and unrealistically) biased by fiducial cosmology assumptions, this would still not be sufficient to rescue post-recombination solutions to the Hubble tension, primarily because of the extremely tight constraints on the (unnormalized) shape of the expansion history from unanchored SNeIa, whose role in the Hubble tension so far has been underappreciated. You can read our results in the preprint we just posted on arXiv: 2510.01974.
