Workpackage 5

Common tools in neutrino and quark flavor physics

Coordinator Dr. Sara Bolognesi (CEA)

Neutrino and flavour physics experiments have to manage a number of similar problems, for which large synergies can
be obtained. This is the case for all computing issues, for real time applications, for data mining algorithms and for
theoretical calculations. Close collaboration on such items is unprecedented in our community and it could produce
benefits for the whole particle physics experimental effort.

The main objective of the workpackage on common tools are the following:

  • Jointly face Belle II and HyperK common problems in computing and big data handling.
  • Exchange data acquisition schemes and remote control techniques developed for different environments and
  • Share statistical methods to treat rare signals and provide easy-to-combine results.
  • Support collaboration of theory experts to improve precision of flavour processes prediction and update
    corresponding generators.

The list of tasks covered by the workpackage is the following

To study a set of common tools for the computing model of Belle2-T2K-HK experiments, which users from Japanese and European Research centres can use in a transparent way. The activity will focus on the following technologies:
a) Computing. Workload Management System based of DIRAC Framework; Data distribution software like CVMFS and Technologies to use Grid and Cloud Resources
b) Storage: Data Access protocol (Grid and Cloud) and Data Transfer system FTS
c) Software: Tools for software development and versioning
d) Network: Common tools for Network Monitoring

To develop and share hardware and software techniques/knowledge for dealing with the challenges of high trigger rate next generation experiments. These include techniques for high data bandwidth optical data transfer, sub-nanosecond timing distribution, intelligent real time algorithms for online data reduction run in parallel on multiple GPUs or FPGAs, as well as novel software solutions for scalable modular DAQ frameworks featuring integrated dynamic service discovery, monitoring, fault tolerance, dynamic routing and remote control.

To develop and document sound statistical methods which allow straightforward combination of results from different experiments, thus extending their individual experimental reach. Study and document the most suited observables to be used in experimental likelihood functions to allow easy combination. Define and documents analysis implementation methods that facilitate combination of results. Leading organizations are CEA and INFN, all the other organizations contribute with specific physics analysis expertise.

To develop a coherent theoretical framework from CP violation analyses in both quark and lepton sector, lepton flavour violation analyses, searches for sterile neutrinos. Study possible common techniques (ex. fitting procedures) to determine CKM and PMNS matrix parameters with high precision. Theoretical support to flavour and lepton analyses in WP1-WP4, including neutrino-nucleus cross section analyses.