Elsevier

Nuclear Physics B

Volume 154, Issue 2, 23 July 1979, Pages 189-204
Nuclear Physics B

Reaction πp → π0n in the 15–40 GeV/c momentum range

https://doi.org/10.1016/0550-3213(79)90510-8Get rights and content

Abstract

A high statistics measurement of the reaction πp → π0n has been performed at the Serpukhov accelerator for 15, 20, 25, 30 and 40 GeV/c incident pion momentum using the NICE set-up with its associated 648-channel hodoscope spectrometer for γ-ray detection. More than 3 million charge-exchange events have been recorded in total.

It is found that the spin-flip and non-spin-flip amplitudes can be parametrized, for small |t|, as exponentials with the same slopes to within a few percent. Also the behaviour of the differential cross section for small and medium |t| agrees with the prediction of a geometrical s-channel model which describes binary reactions in terms of a complex pole b0(s). The imaginary part of this universal pole, Im b0(s), has been determined and found to be growing logarithmically with s.

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Cited by (0)

1)

Institut für Experimentelle Kernphysik, Universität und Kernforschungszentrum, Karlsruhe, Fed. Rep. of Germany.

2)

Istituto di Fisica dell'Università, Pisa, and INFN, Sezione di Pisa, Italy.

3)

IHEP, Serpukhov, USSR.

4)

Visitor from the Lawrence Berkeley Laboratory; now at FNAL, Batavia, USA.

5)

Institut für Hochenergiephysik, ÖAdW, Vienna, Austria.

6)

Now at CERN, Geneva, Switzerland.

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