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NEW HIGH ACCURACY MEASUREMENT OF THE PIONIC MASS

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DOI: 10.1103/PhysRevLett.45.1066
OAI: oai:inspirehep.net:158974
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INSPIRE-HEP
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Abstract

The pionic x-ray energies of the 4f−3d transition in π-P and the 5f−4d transition in π-Ti were measured with a bent-crystal spectrometer at the Nevis synchrocyclotron; and a new value of the pionic mass is deduced to be 139 567.5±0.9 keV, leading to an improved value for the μ-neutrino mass of mνμ2=0.102±0.119 MeV2; mνμ<0.52 MeV, at 90% confidence level.

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