Measurement of the charged pion mass using X-ray spectroscopy of exotic atoms

M. Trassinelli; D.F. Anagnostopoulos; G. Borchert; A. Dax; J.-P. Egger; D. Gotta; M. Hennebach; P. Indelicato; Y.-W. Liu; B. Manil; N. Nelms; L.M. Simons; A. Wells

doi:10.1016/j.physletb.2016.06.025

Physics Letters B (Aug 2016)

Measurement of the charged pion mass using X-ray spectroscopy of exotic atoms

M. Trassinelli,
D.F. Anagnostopoulos,
G. Borchert,
A. Dax,
J.-P. Egger,
D. Gotta,
M. Hennebach,
P. Indelicato,
Y.-W. Liu,
B. Manil,
N. Nelms,
L.M. Simons,
A. Wells

Affiliations

M. Trassinelli: Institut des NanoSciences de Paris, CNRS-UMR 7588, Sorbonne Universités, UPMC Univ. Paris 06, 75005, Paris, France
D.F. Anagnostopoulos: Dept. of Materials Science and Engineering, University of Ioannina, GR-45110 Ioannina, Greece
G. Borchert: Institut für Kernphysik, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany
A. Dax: Laboratory for Particle Physics, Paul Scherrer Institut, CH 5232-Villigen PSI, Switzerland
J.-P. Egger: Institut de Physique de l' Université de Neuchâtel, CH-2000 Neuchâtel, Switzerland
D. Gotta: Institut für Kernphysik, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany
M. Hennebach: Institut für Kernphysik, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany
P. Indelicato: Laboratoire Kastler Brossel, UPMC-Sorbonne Universités, CNRS, ENS-PSL Research University, College de France, 4, place Jussieu, 75005 Paris, France
Y.-W. Liu: Laboratory for Particle Physics, Paul Scherrer Institut, CH 5232-Villigen PSI, Switzerland
B. Manil: Laboratoire Kastler Brossel, UPMC-Sorbonne Universités, CNRS, ENS-PSL Research University, College de France, 4, place Jussieu, 75005 Paris, France
N. Nelms: Dept. of Physics and Astronomy, University of Leicester, Leicester LEI7RH, England, United Kingdom
L.M. Simons: Laboratory for Particle Physics, Paul Scherrer Institut, CH 5232-Villigen PSI, Switzerland
A. Wells: Dept. of Physics and Astronomy, University of Leicester, Leicester LEI7RH, England, United Kingdom

DOI: https://doi.org/10.1016/j.physletb.2016.06.025
Journal volume & issue: Vol. 759, no. C
pp. 583 – 588

Abstract

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The 5g−4f transitions in pionic nitrogen and muonic oxygen were measured simultaneously by using a gaseous nitrogen–oxygen mixture at 1.4 bar. Due to the precise knowledge of the muon mass the muonic line provides the energy calibration for the pionic transition. A value of (139.57077 ± 0.00018) MeV/c2 (± 1.3 ppm) is derived for the mass of the negatively charged pion, which is 4.2 ppm larger than the present world average.

Published in Physics Letters B

ISSN: 0370-2693 (Print); 1873-2445 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: http://www.journals.elsevier.com/physics-letters-b/

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