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UZH > Physik-Institut >Group Serra

The LHCb experiment is one of the large LHC experiment at CERN in Geneva. It has been designed and optimized to study decays of b- and c- hadrons (particles containing a beauty or a charm quark).

Our group is mainly involved in the search for New Physics in rare decays of B-mesons. These decays are particularly interesting since they are suppressed in the Standard Model and New Physics can enter with comparable strength.

In particular, we performed measurements of Electroweak Penguin (b→sll) decays. One of the process we study is the decay B0→K*μμ, where some of the measurements show a discrepancy with respect to Standard Model predictions. This is known in the literature as the "B0→K*μμ anomaly".

At the moment it is still not clear if this effect can be accommodated within the Standard Model with a large breaking of QCD factorization. In collaboration with the theory group of the University of Zurich we are studying new observables that can help us to disentangle genuine New Physics effects from QCD. We are also working on Lepton Flavour Violating decays and searches for very weakly interacting long living particles.

The LHCb detector will be upgraded in the year 2018. This will allow us to increase LHCb instantaneous luminosity of a factor ~ 5, with respect to the nominal current LHCb setup. We are involved in the design and construction of the Upstream Tracker, a silicon based micro-strip tracking detector upstream of the LHCb magnet. This detector will be crucial for triggering in upgrade conditions.

The SHiP experiment is a new fixed target experiment at the Super Proton Synchrotron (SPS) of CERN in Geneva. The aim of the experiment is to search for very weakly interacting long living particles, in particular for Sterile Neutrinos with a mass below 5GeV. We have been among the initiators of this experiment, contributing to the design, optimization, background and sensitivity studies. We hosted in the physics institute of the University of Zurich the First SHiP Workshop, where the collaboration was initially formed and the SHiP Physics Programme was discussed.

We are also involved in the design and construction of the SHiP Veto Timing detector, which is a scintillating bar detector covering an area of 72m2 with a timing resolution better than 100ps.