LTP: Laboratory for Particle Physics
Scientific Highlights and News
Stefan Ritt, leader of the Muon Physics group at the Laboratory for Particle Physics, has received today the prestigious IEEE Emilio Gatti Radiation Instrumentation Technical Achievement Award, for "contributions to the development and democratization of ultra-high-speed digitizers”.
With Mario Liechti (gold) and Melvin Deubelbeiss (bronze) two of our electronics apprentices achieved a place on the winners’ podium at the SwissSkills 2020. The SwissSkills are the Swiss professional championships organized by the leading industry associations. The final competition took place October 27 - 30, 2020 at Schindler Elevators in Ebikon.
We demonstrate efficient transverse compression of a 12.5 MeV=c muon beam stopped in a helium gas target featuring a vertical density gradient and crossed electric and magnetic fields. The muon stop distribution extending vertically over 14 mm was reduced to a 0.25 mm size (rms) within 3.5 μs. The simulation including cross sections ...
Franziska Hagelstein has been awarded a Swiss National Science Foundation Ambizione grant with PSI as host institution. She joined the particle theory group (NUM, Laboratory of Particle Physics LTP) in October 2020. In the near future she will be accompanied by a PhD student.
Recently, discrepancies of up to 4σ between the different determinations of the Cabibbo angle were observed. In this context, we point out that this “Cabibbo-angle anomaly” can be explained by lepton flavor universality violating new physics in the neutrino sector. However, modified neutrino couplings to standard model gauge bosons also affect many other observables sensitive to lepton flavor universality violation, which have to be taken into account in order to assess the viability of this explanation.