n p scattering measurements at 162-MeV and the pi N N coupling constant
- J. Rahm(,)
- CERN and
- Uppsala U.
- J. Blomgren(,)
- CERN and
- Uppsala U.
- H. Conde(,)
- CERN and
- Uppsala U.
- S. Dangtip(,)
- CERN and
- Uppsala U.
- K. Elmgren()
- CERN and
- Uppsala U.
20 pages
Published in:
- Phys.Rev.C 57 (1998) 1077-1096
Citations per year
Abstract: (APS)
The differential np scattering cross section has been measured at 162 MeV in the angular range θc.m.=72°−180°, using the neutron beam facility at The Svedberg Laboratory in Uppsala. Special attention was paid to the absolute normalization of the data. In the angular range 150°−180°, the data are steeper than those of most previous measurements and predictions from energy-dependent partial-wave analyses or nucleon-nucleon potentials. At 180°, the difference is of the order of 10–15%, an important change since this cross section is considered as a primary standard. It has also consequences for fundamental physics. Moreover, a value of the charged πNN coupling constant, gπ±2=14.52±0.26 (fπ±2=0.0803±0.0014), is deduced from the data, using a novel extrapolation method. This is in good agreement with the classical text book value, but higher than those determined in recent partial-wave analyses of the nucleon-nucleon data base.- p n: interaction
- coupling constant: (2nucleon pi)
- differential cross section: angular dependence
- nucleon nucleon: potential
- partial wave analysis
- magnetic spectrometer: experimental results
- 0.162 GeV
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