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CHALLENGE:
- To measure the strong interaction width and shift of the ground state
of pionic hydrogen with high precision:
better than 1% for the shift and about 2% for the width.
SOLUTION:
- Use the PSI
cyclotron trap
to produce the pionic hydrogen atoms
in controlled environment.
- Use
crystal spectrometers
and
CCD detectors
to measure the X-ray lines.
- Perform measurements at different hydrogen densities.
- Perform simultaneous measurements of the pionic and
muonic hydrogen X-ray lines.
- Use the
atomic cascade
code to determine the Doppler
broadening corrections to the widths of the X-ray lines.
RESULT:
- The pion-nucleon
scattering lengths
will be determined with the accuracy of about 1%.
- The pion-nucleon
coupling constant
will be calculated.
- The isospin breaking effects will be evaluated.
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