COMETA (COmprehensive Multiboson Experiment-Theory Action) is a EU-funded project that aims at connecting members of HEP theory, experiment and Machine Learning communities, with the goal of improving measurements of multi-boson processes at the (HL-)LHC and their interpretation. 
The vast research program covered by COMETA includes precision calculations, EFT and BSM interpretations, the development of jet-substructure algorithms and of W/Z polarization taggers. 
COMETA also aims at creating an inclusive and informal environment, where young scientists and researchers based in underfunded european countries can gain international visibility.

More information and a link to join the network can be found at https://www.cost.eu/actions/CA22130/

Comprehensive Multiboson Experiment-Theory Action
https://www.cost.eu