Elsevier

Nuclear Physics A

Volume 721, 30 June 2003, Pages C849-C852
Nuclear Physics A

Precision measurements in pionic hydrogen

https://doi.org/10.1016/S0375-9474(03)01224-7Get rights and content

Abstract

The strong interaction in the pion nucleon system leads to a shift and a broadening of the 1s-ground state in pionic hydrogen. These two quantities are being measured in an experiment at the Paul Scherrer Institute with much improved precision and allow an experimental test of recent calculations in the framework of Chiral Perturbation Theory. The experimental techniques using high resolution crystal spectroscopy are described as well as recent results.

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