Negatively charged pions from two-body decays of stopped Λ4H hypernuclei were studied in 2012 at the Mainz Microtron MAMI, Germany. The momenta of the decay-pions were measured with unprecedented precision by using high-resolution magnetic spectrometers. A challenge of the experiment was the tagging of kaons from associated K+? production off a Be target at very forward angles. In the year 2014, this experiment was continued with a better control of the systematic uncertainties, with better suppression of coincident and random background, improved particle identification, and with higher luminosities. Another key point of the progress was the improvement in the absolute momentum calibration of the magnetic spectrometers.
|Journal||EPJ Web of Conferences|
|Publication status||Published - 2016 Mar 25|
|Event||21st International Conference on Few-Body Problems in Physics, FB 2015 - Chicago, United States|
Duration: 2015 May 18 → 2015 May 22
ASJC Scopus subject areas
- Physics and Astronomy(all)