New experimental results
LHCb results strengthen hints of a violation of lepton flavour universality
April 7, 2021
Theory DivisionLHCb has overcome the 3 sigma barrier in the tension between the measurement of the observable RK and the prediction of the SM, reaching 3.1 sigmas. This observable tests the universality (or not) of leptonic flavor. The SM predicts a value of 1 very accurately for this observable.
Marcel Algueró on behalf of the group led by Joaquim Matias presented the implications of this new data in the global analyzes of observables governed by b-> sll in the (virtual) conference of Moriond QCD 2021.
Joaquim Matias is quoted in an article about the results in Diaria Ara
Link to CERN Press release
New publication
New theory paper on the muon anomalous magnetic moment
May 18, 2022
“Evaluation of the three-flavor quark-disconnected contribution to the muon anomalous magnetic moment from experimental data” by S. Peris, M. Golterman (IFAE visitor) and collaborators has been published at Physical Review D. The article is highlighted as an Editor’s Suggestion.
New Paper
New Theory Group Paper on Gravitational waves from axionic defects
April 20, 2022
“High Quality QCD Axion at Gravitational Wave Observatories” by Ricardo Z. Ferreira, O. Pujolas and collaborators has been published at Physical Review Letters.