Challenging the Standard Model with the scrutiny of b to qll transitions

Informations projet

Chiaroscuro

N° de convention de subvention: 101018181

DOI

10.3030/101018181

Date de signature de la CE 8 Juillet 2021

Date de début 1 Octobre 2021

Date de fin 30 Septembre 2028

Financé au titre de

• EXCELLENT SCIENCE - European Research Council (ERC)

Coût total

€ 2 221 993,00

Contribution de l’UE

€ 2 221 993,00

Coordonné par

CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS
France

Periodic Reporting for period 2 - Chiaroscuro (Challenging the Standard Model with the scrutiny of b to qll transitions)

Période du rapport: 2023-04-01 au 2024-09-30

Résumé du contexte et des objectifs généraux du projet

The Chiaroscuro project is probing the potential existence of elementary particles beyond those currently known from the Standard Model of Particle Physics.
During its first 30 months, despite external challenges such as the COVID-19 pandemic and the war in Ukraine, the project progresses well using the data already recorded by the LHCb experiment at CERN. Indeed, due to the delay in the recording of physics quality data with the upgraded LHCb detector, the project extracts as much as possible the full information from the previously recorded data. In parallel, the understanding of the new data is on-going.

Travail effectué depuis le début du projet jusqu’à la fin de la période considérée dans le rapport et principaux résultats atteints jusqu’à présent

We have performed detailled studies on b→see transitions in particuler for the Bs -> Phi ee decay mode and the B0 -> K*0 ee decay mode

Progrès au-delà de l’état des connaissances et impact potentiel prévu (y compris l’impact socio-économique et les conséquences sociétales plus larges du projet jusqu’à présent)

We have performed detailed studies on b→see transitions which are of great interest because their comparison may help to shade light on tensions seen in transitions b→s mu mu transitions which are already well studied, contrary to modes involving electrons.

One of the billions of events recorded by the LHCb experiment.