Periodic Reporting for period 4 - BSMFLEET (Challenging the Standard Model using an extended Physics program in LHCb)
Período documentado: 2019-10-01 hasta 2020-03-31
During this project, the trigger efficiency for the 2016-2019 period was improved by about an order of magnitude compared to the state prior to the project. This allowed a very precise search for Ks->μμ, which showed no signal evidence. Other strange decays into dimuons are being searched in the same dataset. The trigger efficiency for the LHCb upgrade (2021-) has been improved by yet another order of magnitude thanks to the use of GPU instead of the previous, hardware-based, L0. This improvement will allow to get very close to the SM prediction for KS->μμ. In addition, we provided the world best limits in NMSSM higgses in the Y mass region.
The project has published four CERN-LHCb public notes, two CERN-LHCb conference note, and 19 publications peer-reviewed journals. The team members have given tens of talks at international conferences. The main results
of the WP1 were highlighted at CERN Courier. WP2 was designed to search for NMSSM A1 Higgs bosons near the Y mass region. No signal was found, so we set world best upper limits on that mass region. WP3 and WP4 were
meant to develop roadmap analyses of Bs mesons, most notably providing an improved measurement of the CP violating phase φs. To achieve this result we made a GPU analysis framework for HEP, which we later use for several other measurements.