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Mainz 2022 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 20: Hadron Structure and Spectroscopy IV

HK 20.3: Talk

Monday, March 28, 2022, 16:45–17:00, HK-H9

Measuring the 2s-1s transition in Muonic atoms — •Nilesh Deokar — Johannes Gutenberg University of Mainz, Johann Joachim-Becher-Weg 45, 55128 Mainz, Germany

Muonic X-rays are produced when negative muons are stopped inside matter and cascade down the different energy levels of an atom. The 2s-1s muonic X-rays are a potential observable to study the Atomic Parity Violation (APV) in muonic atoms. For a Krypton (2018) and a Zinc (2019) target, Muonic X-ray measurements were carried out at the Paul Scherrer Institute using muon beam from the piE1 beamline facility to detect these 2s-1s X-rays. High Purity Germanium (HPGe) detectors surrounded the targets to detect the outgoing Muonic X-rays. The X-rays of interest in Krypton and Zinc are in the 1-2 MeV energy range. The signal though, is buried under background arising from delayed Michel electrons, nuclear capture background from muons, Bremsstrahlung etc. A scan of various time and energy cuts along with X-ray-Xray coincidences is implemented to reduce this background and optimize the signal to background ratio. A clear observation of the 2s-1s transition opens up to the possibility for an APV experiment with muonic atoms.

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