Very happy to see the CosmoVerse white paper, produced within the CosmoVerse COST Action, out today! The white paper discusses in detail the state-of-the-art regarding a number of observational tensions in cosmology (among all the Hubble tension) and how these may be solved either through new fundamental physics or systematics. Huge congrats are due to my friends and colleagues Eleonora Di Valentino and Jackson Levi Said for leading this massive effort featuring over 400 pages and over 500 authors, which required significant coordination and management skills. I myself was one of the Section Coordinators, for section 4.1.3 on extra relativistic degrees of freedom. You can read our results in the preprint we just posted on arXiv: 2504.01669.
CosmoVerse interview
As part of CosmoVerse’s “Meet our scientists” initiative, today I was interviewed on a number of things, both physics-related and non. You can read the interview here, and the answer to the last question may be particularly interesting for tennis fans!
CosmoVerse seminar
Today I delivered a CosmoVerse seminar by the title of Seven hints that early-time new physics alone is not sufficient to solve the Hubble tension, no surprise focused on my seven hints paper (slides here). The seminar was recorded and posted on YouTube, here is the link. A long and stimulating discussion followed, with several very interesting questions and comments from experts in the field, including Adam Riess, Vivian Poulin, and Leandros Perivolaropoulos. For other videos in this seminar series, check out the CosmoVerse YouTube channel. The next seminar from Stefano Anselmi is one which promises to be very interesting!
William Giarè wins STSM grant to visit Trento
We’ll have visitors soon: William Giarè, currently a postdoc at the University of Sheffield, has won a COST short-term scientific mission (STSM) within the CosmoVerse COST Action, which will allow him to visit the University of Trento! COST STSM grants are individual mobility and collaboration grants which are aimed towards fostering collaborations between researchers within a given COST Action. William will be visiting Trento at some point in March, and we plan on finalizing and starting up a number of projects, broadly related to the subject of cosmological tensions, ranging from the nature of dark energy, to the S8 tension “done properly” (I guess you’ll have to wait to see what we mean). We have several interesting things we want to discuss, and I look forward to the visit! Congratulations William!
CosmoVerse
As of today I am officially a member of the CosmoVerse COST (European Cooperation in Science and Technology) Action, an European network of like-minded people with a particular interest in cosmological tensions, aiming at fostering interdisciplinary research. The Action is chaired by Jackson Levi Said at the University of Malta, whereas the Vice Chair is my friend and colleague Eleonora Di Valentino. I look forward to many interesting discussions, workshops, and seminars that will come out of CosmoVerse!
