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Technical Trials for Easing the (Cosmological) Tension - EurekAlert
11 new models (including extensions of the current one) for understanding our Universe have been scrutinized in a new paper by Ali Rida Khalife, researcher at the Sorbonne Université and the Centre National de la Recherche Scientifique, along with colleagues from the Sorbonne Université and Aachen University, just published (april 19, 2024) in the<em> Journal of Cosmology and Astroparticle Physics </em>JCAP. All these models attempt to resolve the so-called Hubble Tension, “one of the major problems in modern cosmology”, as Khalife himself describes it. This tension concerns the Hubble parameter, which describes the Universe's expansion today, when it is calculated with different methods and data, and it challenges the way modern physics understands and describes the universe, making its resolution crucial. The new work excludes three of the models analyzed, which yield too uncertain results, and shows that among the remaining viable ones, no single model is superior to the others. According to the authors, a change in direction in how we're attempting to solve the tension (or a merging of different models) might be necessary.
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