Measurement of the Strong Interaction Shift and Width of the Ground State of Pionic Hydrogen
- Manil, G. W.
- Anagnostopoulos, D. F.
- Jensen, D. S.
- Liu, Y. W.
- Markushin, B. R.
- Nelms, N.
- Simons, L. M.
- Zmeskal, H.
- Biri, S.
- Borchert, G. L.
- Breunlich, R. T.
- Egger, J. P.
- Gotta, D.
- Gruber, A.
- Hennebach, M.
- Indelicato, P.
Publication date
January 2003
DOI Publisher
Springer Science and Business Media LLC ISSN
0304-3843Abstract
An experiment to measure the strong interaction width (Gamma(1s)) and shift (epsilon(1s)) of the ground state of pionic hydrogen (lambda(-)p), in order to determine the isospin separated scattering lengths (a(+) and a(-)) with a relative accuracy of better than 10(-2), has been undertaken at the Paul Scherrer Institute (PSI). This measurement is based on high-precision X-ray spectroscopy of the np-->1s transitions pionic hydrogen (pi(-)p). A preliminary analysis of the data taken in December 2000 is presented
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