Experiment on Charge Independence in Interactions of Nucleons and Pions

Harting, D.; Kluyver, J.C.; Kusumegi, Asao; Rigopoulos, R.; Sachs, A. M.; Tibell, G.; Vanderhaeghe, G.; Weber, G.

doi:10.1103/physrev.119.1716

Cited by 38 publications

(5 citation statements)

References 11 publications

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“…The measured ratio of the matrix elements squared for the two lower beam momenta of 2.03 ± 0.02 is in agreement with the result R = 2.13 ± 0.13 obtained by Harting et al [15] at a beam energy of 591 MeV. At this energy the differences in the kinematics are expected to be small.…”

Section: Resultssupporting

confidence: 80%

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Simultaneous measurements of the reactions

et al. 2001

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A stack of annular detectors made of high purity germanium was used to measure simultaneously pd → 3 H π + and pd → 3 He π 0 differential cross sections at beam momenta of 750 MeV/c, 800 MeV/c, and 850 MeV/c over a large angular range. The extracted total cross sections for the pd → 3 He π 0 reactions bridge a gap between near threshold data and those in the resonance region. The ratio of the cross sections for the two reaction channels taken at the same η = p cm π /m π yields 2.11±0.08 indicating that a deviation from isospin symmetry is very small.

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Section: Resultssupporting

confidence: 80%

“…This principal advantage is lost when the detector does not allow simultaneous measurements as in Ref. 's [14][15][16][17]. Furthermore, these studies are restricted to only a few (up to 4) angles.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous measurements of the reactions

et al. 2001

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“…These reactions were measured by Crewe et al [6] at 450 MeV, and by Hartig et al [7] at 591 MeV respectively. This test involves a rather large and uncertain EM correction of about 6% Since there is a large difference between the wave functions of H 3 and He 3.…”

Section: O(he 3)mentioning

confidence: 97%

Isopin invariance in the reaction np → π0d

et al. 1971

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A measurement of the differential cross section for the reaction np ~ TrOd has been made at the Lawrence Radiation Laboratory 184-inch cyclotron. A neutron beam with kinetic energies up to 720 MeV was incident on a liquid hydrogen target. The angle and momentum of the deuterons were measured using an analyzing magnet and wire spark chambers with a magnetostrictive readout. Deuterons were separated from protons by time-of-flight. The photons from the decaying ~r ° were not detected. The neutron energy was calculated from the measured deuteron angle and momentum. Out of 5 × 10 s events recorded, 1.1 × 10 s events were the desired ~r°d reaction. The cross sections were compared to those for the reaction rr+d ~ pp as a test of isotopic spin invariance in strong interactions. The symmetry of the cross sections about 90 ° was also investigated, and an upper limit of about 1% was placed on the real part of the ratio of isospin-violating to isospin-conserving amplitudes.

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“…1 magnetic spectrometer and do havoc to 39 even the best particle identification system. We note parenthetically, that one of the experiments reported in the literature 80 was run almost precisely at such an undesirable angle at which elastic protons would overwhelm tritons in the focal plane of the spectrometer and another experiment 78 was run at an angle at which pion yield from the pp -> d?r + reaction (from quasi free protons in deuterium)…”

Section: G2 Pion -Deuteron Total Cross Sectionsmentioning

confidence: 99%

Precision test of charge independence of hadronic interactions

Artuso¹

1986

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This report was prepared as an account of work sponsored by an agency of the United States Government. Neither ihe United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus product, or process disclosed, or represents that its use would no' infringe privately owned rights. Reference herein to any specific commercial product, process or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply us endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily slate or reflect those of the United Sta'es Government or any agency thereof.

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Experiment on Charge Independence in Interactions of Nucleons and Pions

Cited by 38 publications

References 11 publications

Simultaneous measurements of the reactions

Simultaneous measurements of the reactions

Isopin invariance in the reaction np → π0d

Precision test of charge independence of hadronic interactions

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