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Czechoslovak Journal of Physics

, Volume 52, Supplement 2, pp B169–B174 | Cite as

The pionic hydrogen experiment at PSI

  • D. Gotta
  • M. Hennebach
  • Y. -W. Liu
  • V. Markushin
  • L. M. Simons
  • H. Fuhrmann
  • A. Gruber
  • J. Zmeskal
  • P. Indelicato
  • B. Manil
  • D. Anagnostopoulos
  • N. Nelms
Contributions
  • 16 Downloads

Abstract

A new high-precision determination of the strong-interaction shift (∈1s) and broadening (Γ1s) of the ground state in pionic hydrogen (πH) has been started at PSI. This constitutes a direct measurement of the πN scattering lengths and is an important test of the methods of chiral perturbation theory.

The experiment will be conducted in two steps. In the first step we aim for a precision of 0.2% for ∈1s and 3% for Γ1s. A new method of energy calibration is used: by measuring πH simultaneously with pionic oxygen (πO), systematic errors are suppressed. The goal for the second step is an accuracy of 1% for Γ1s.

PACS

36.10 13.75.G 

Key words

exotic atoms pion-nucleon interaction x-ray spectroscopy 

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Copyright information

© Institute of Physics, Acad. Sci. CR 2002

Authors and Affiliations

  • D. Gotta
    • 1
  • M. Hennebach
    • 1
  • Y. -W. Liu
    • 2
  • V. Markushin
    • 2
  • L. M. Simons
    • 2
  • H. Fuhrmann
    • 3
  • A. Gruber
    • 3
  • J. Zmeskal
    • 3
  • P. Indelicato
    • 4
  • B. Manil
    • 4
  • D. Anagnostopoulos
    • 5
  • N. Nelms
    • 6
  1. 1.Institut für KernphysikForschungszentrum JülichJülich
  2. 2.Paul-Scherrer-Institut (PSI)VilligenSwitzerland
  3. 3.IMEPÖsterreichische Akademie der WissenschaftenViennaAustria
  4. 4.Laboratoire Kastler-BrosselUniversité Pierre et Marie CurieParisFrance
  5. 5.Department of Material ScienceUniversity of IoanninaIoanninaGreece
  6. 6.Dept. of Physics and AstronomyUniversity of LeicesterLeicesterEngland

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