Dortmund 2021 – scientific programme

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T: Fachverband Teilchenphysik

T 78: Electroweak Interactions II

T 78.9: Talk

Thursday, March 18, 2021, 18:00–18:15, Tc

Measuring the 2s-1s transition in Muonic atoms — •Nilesh Deokar — Johannes Gutenberg University of Mainz, Germany

2s-1s muonic X-rays are a potential observable to study Atomic Parity Violation (APV) in muonic atoms. Muonic X-rays are produced when negative muons are stopped in matter and cascade down the different energy levels of an atom. To detect the 2s-1s X-rays, a krypton target (2018) and a zinc target (2019) were placed in a negative muon beam from the piE1 beamline at the Paul Scherrer Institute, Switzerland. The targets were surrounded by High Purity Germanium (HPGe) detectors on two sides which detected the outgoing muonic X-rays. The beam momenta ranged from around 28 MeV/c (for krypton) and 33 MeV/c to 35 MeV/c (for zinc) during the run. The 2s-1s transition in krypton corresponds to an energy value of ~2222 keV which in zinc is ~1640 keV. These transitions are overshadowed by background transitions and also the X-rays scattered between the HPGe detectors which give rise to satellite peaks. X-ray-X-ray coincidences can help to suppress this background. The analysis of the data acquired revolves around separating the 2s-1s transitions from the background. A clear observation of the 2s-1s transition opens up to the possibility for an APV experiment with muonic atoms.