Negative Meson Absorption in Liquid Hydrogen
A theoretical study was made of the atomic physics involved in negative meson capture in liquid hydrogen, with the main purpose of setting an upper limit on the fraction of K mesons that react with the proton from the P state. The results placed on a quantitative footing the recent conclusion of Day, Snow, and Sucher (cf. G. A. Snow, Proceedings of the Tenth Annual Conference on High Energy Physics, 1960, p. 407) that nuclear reaction takes place from the high n,S states of the pi or K mesic atoms. The problem involves the rates for the principal mode of deexcitation of the mesic atoms, Auger ionization of neighboring hydrogen atoms; as well as the rates for S state mixing (''Stark mixing '), induced by the electric fields of these neighboring atoms, and the resulting S state absorption by the proton. The Auger rates were calculated in Born approximation for all the appropriate initial and final values of n. The S state mixing and absorption rates, on the other hand, were calculated by an impact parameter method, taking into account both the Stark splitting and the strong interaction energy shift. The resulting cascade time for the pion is compatible with the experimental value, while the desired upper limit for the P state capture of the K meson is less than one percent.
- Research Organization:
- Cornell Univ., Ithaca, N.Y.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-16-024822
- OSTI ID:
- 4828845
- Journal Information:
- Physical Review, Journal Name: Physical Review Journal Issue: 2 Vol. 127; ISSN PHRVAO; ISSN 0031-899X
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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