LTP: Laboratory for Particle Physics
The Laboratory of Particle Physics (LTP) at the Paul Scherrer Institute pursues fundamental research, addressing some of the most up to date questions in modern, accelerator-based particle physics. read more
Scientific Highlights and News
The neutron gyromagnetic ratio has been measured relative to that of the 199Hg atom with an uncertainty of 0.8 ppm. We employed an apparatus where ultracold neutrons and mercury atoms are stored in the same volume and report the result γn/γHg = 3.8424574(30).
We implement a systematic effective field theory approach to the benchmark process μ → eγ, performing automated one-loop computations including dimension 6 operators and studying their anomalous dimensions. We obtain limits on Wilson coefficients of a relevant subset of lepton-flavour violating operators that contribute to the branching ratio μ → eγ at one-loop.