ISSN:
1434-6052
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract. The reaction np $\rightarrow$ pp $\pi^-}$ has been studied in a kinematically complete measurement with a large acceptance time-of-flight spectrometer for incident neutron energies between threshold and 570 MeV. The proton-proton invariant mass distributions show a strong enhancement due to the pp( $^1{\rm S}_0$ ) final state interaction. A large anisotropy was found in the pion angular distributions in contrast to the reaction pp $\rightarrow$ pp $\pi^0$ . At small energies, a large forward/backward asymmetry has been observed. From the measured integrated cross section $\sigma({{\rm n}{\rm p} \rightarrow{\rm p}{\rm p} \pi^-})$ , the isoscalar cross section $\sigma_{01}$ has been extracted. Its energy dependence indicates that mainly partial waves with Sp final states contribute.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s100520100852
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