Electronic Resource
Springer
The European physical journal
268 (1974), S. 75-84
ISSN:
1434-601X
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract The real part of the invariant isospin evenπ N amplitudeC +≡A′ + at ¦t¦≲0.4 (GeV/c)2 is determined from the condition thatC + fulfills the fixed-t dispersion relation, is compatible with this amplitude as reconstructed from phase shifts up to 1.5 GeV/c and leads to differential cross sections above 3 GeV/c in agreement with the experimental data.-The result for ReC +/ImC + is remarkably large (−0.5 att=−0.3 (GeV/c)2 and 6 GeV/c) and up to 20 GeV/c its uncertainty is comparable with that in the upper part of the phase shift region.-Even at 40 GeV/c ReC + is far from being asymptotic because of large energy independent low energy contributions. The deviations from our simple high energy ansatz (k〉4GeV/c): ImC +(k, t)∼(k + m)exp(9t/2) are almost comparable with the experimental errors.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01670064
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