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Title: Measurement of the charged pion mass using a low-density target of light atoms
Authors: Trassinelli, M.
Anagnostopoulos, D. F.
Borchert, G.
Dax, A.
Egger, J.-P.
Gotta, D.
Hennebach, M.
Indelicato, P.
Liu, Y.-W.
Manil, B.
Nelms, N.
Simons, L. M.
Wells, A.
First Published: 29-Nov-2016
Presented at: MESON 2016 – 14th International Workshop on Meson Production, Properties and Interaction, KRAKÓW, POLAND
Start Date: 2-Jun-2016
End Date: 7-Jun-2016
Publisher: EDP Sciences: EPJ Open Access, SpringerOpen, Società Italiana di Fisica
Citation: EPJ Web of Conferences, 2016, 130, 01022
Abstract: We present a new evaluation of the negatively charged pion mass based on the simultaneous spectroscopy of pionic nitrogen and muonic oxygen transitions using a gaseous target composed by a N2/O2 mixture at 1.4 bar. We present the experimental set-up and the methods for deriving the pion mass value from the spatial separation from the 5g − 4f πN transition line and the 5g − 4f μO transition line used as reference. Moreover, we discuss the importance to use dilute targets in order to minimize the influence of additional spectral lines from the presence of remaining electrons during the radiative emission. The occurrence of possible satellite lines is investigated via hypothesis testing methods using the Bayes factor.
DOI Link: 10.1051/epjconf/201613001022
eISSN: 2100-014X
Version: Publisher Version
Status: Peer-reviewed
Type: Conference Paper
Rights: Copyright © the authors, 2016. This is an open-access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Appears in Collections:Conference Papers & Presentations, Dept. of Physics and Astronomy

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