New experimental results

LHCb results strengthen hints of a violation of lepton flavour universality

April 7, 2021

Theory Division

LHCb 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

Latest Group News

Publication

New Multi-Messenger Paper

November 17, 2021

“Quantum gravity phenomenology at the dawn of the multi-messenger era – A review” has been uploaded to arXiv. Members of the Gamma-ray, Gravitational Waves and Theory group are among the authors: Diego Blas, Merve Colak, Daniel Kersberg, Manel Martínez, Mario Martínez.

New Paper

New theory group paper - Flavour

November 3, 2021

B Flavour Anomalies: 2021 Theoretical Status Report” by Joquim Matias and David London has been uploaded to arXiv and will be published in the Annual Review of Nuclear and Particle Science.