LTP(izza)hD 12/2024

Monday 9 Dec 2024, 17:30 → 19:00 Europe/Zurich

WBGB/021 (TimeOut)

Sophie Kollatzsch (PSI - Paul Scherrer Institut), Timothy David Hume (PSI - Paul Scherrer Institut)

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All LTP students and postdocs of PSI and associated groups/universities are invited to join this event in the LTPhD seminar series. There will be plenty of time for discussions and to enjoy the pizza together.

1 MEG II Experiment; to Search for Lepton Flavor Violation (μ→eγ)

After the discovery of neutral lepton flavor violation by Super Kamiokande, it is strongly suggested that lepton flavor number conservation is also violated in the charged sector. For the search of charged lepton flavor violation, the MEG II experiment's detectors were optimized to discover the decay mu->eγ. The liquid xenon (LXe) calorimeter is used to detect high-energetic photons. Since the start of the MEG II experiment in 2021, radiation damage of silicon photomultipliers in LXe has been observed, but the cause is not clear until now. Also, in 2024, a leak in the LXe calorimeter has been found. In this presentation, I will introduce the MEG II experiment, and my studies on the radiation damage and the xenon leak.

Speaker: Ryusei Umakoshi (University of Tokyo)

umakoshi_ltp_20241209.pdf

17:50 Pizza

2 Your input on 2024 PPA survey

Speakers: Sophie Kollatzsch (PSI - Paul Scherrer Institut), Timothy David Hume (PSI - Paul Scherrer Institut)

Provide your feedback

3 The Path to Multiloop Amplitudes: From Feynman Diagrams to a Number

High-precision predictions in particle physics depend on the calculation of multiloop amplitudes - a process that transforms Feynman diagrams into numerical results. In this talk, I will demystify this intricate journey, using a simple yet illustrative example to guide you through the essential steps of the computation.

Speaker: Fabian Lange (PSI - Paul Scherrer Institut)

amplitudes_fabian.pdf