LTPhD 03/2024

Friday 22 Mar 2024, 15:30 → 17:00 Europe/Zurich

WBGB/021 (TimeOut)

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

1 Sensitivity to the muon EDM from the directional asymmetry in decay positrons

In this talk I will show how we are planning to measure the muon electric dipole moment (EDM) at PSI. The focus is on the calculation of the sensitivity to the EDM from an analysis of the Michel decay. I will highlight methods to increase our measurement sensitivity and I will show how fist order radiative corrections change the calculated muon decay spectrum and angular distribution.

What I promise is zero wires, zero real world pictures and 100% abstract calculations.

Speaker: Chavdar Dutsov (PSI - Paul Scherrer Institut)

16:00 Coffee & Guetzli

2 Antihydrogen production and trapping

Antihydrogen is a simple atomic system made exclusively out of antimatter, which makes it a desired subject to test the CPT theorem by probing the energy structure using electromagnetic radiation (lasers and microwaves). Due to its charge neutrality, antihydrogen also serves as an excellent system for testing the Weak Equivalence Principle of antimatter. Gravitational behaviour of the antihydrogen can be tested by performing free-fall measurements. A recent result of the ALPHA-g experiment at CERN has ruled out the option of so-called “antigravity,” although the exact value of the gravitational constant between matter and antimatter still needs to be determined accurately. In the presentation, I will discuss the methods used in ALPHA Experiment to produce and trap antihydrogen.

Although antimatter traps require using a lot of cables, I promise to focus on the other parts of the apparatus and will avoid showing too many cables.

Speaker: Joanna Peszka