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 axions
June 8, 2022
Do direct detection experiments constrain axionlike particles coupled to electrons? by Ricardo Z. Ferreira and collaborators has been published at Physical Review Letters.
New Puublication
Theory Group paper featured in AAS Nova research Highlights
June 1, 2022
“New Roads to the Small-scale Universe: Measurements of the Clustering of Matter with the High-redshift UV Galaxy Luminosity Function ” by Diego Blas and collaborators is featured in the AAS Nova research Highlights.
New publication
New theory paper on CP violation
May 25, 2022
“New-physics signatures via CP violation in η (0) → π 0 µ + µ − and η 0 → ηµ + µ − decays ” by R. Escribano, E. Royo and P. Sánchez-Puertas has been published in JHEP.