Two Nucleon Absorption of $\pi^+$ and $\pi^-$ on $^{3}$He Across the $\Delta$ Resonance Region

Weber, P.; Backenstoss, G.; Izycki, M.; Powers, R.J.; Salvisberg, P.; Steinacher, M.; Weyer, H.J.; Cierjacks, S.; Hoffart, A.; Ullrich, H.

doi:10.1016/0375-9474(89)90160-7

Two Nucleon Absorption of $\pi^+$ and $\pi^-$ on $^{3}$ He Across the $\Delta$ Resonance Region

Feb, 1989

36 pages

Published in:

Nucl.Phys.A 501 (1989) 765-800

Published: 1989

DOI:

10.1016/0375-9474(89)90160-7

Report number:

PSI-PR-89-03

Experiments:

PSI-R-85-11

View in:

Nuclear Science References

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Abstract: (Elsevier)

The angular distributions of nucléons from a kinematically complete measurement of pions absorbed in 3 He on nucleon pairs with isospin T = 0 and T = 1 at incident pion energies of 64, 119, 162 and 206 MeV are presented. The T = 0 data are quite similar to pion absorption data in deuterium but scale with the number of nucleon pairs. The T = 1 cross sections are an order of magnitude smaller and the angular distributions show a significant asymmetry. This asymmetry together with the measured energy dependence indicates interference effects between amplitudes with and without Δ isobars in the intermediate states.

Nuclear reactions
pi+ light nucleus: nuclear reaction
pi- light nucleus: nuclear reaction
pi light nucleus: absorption
helium: nuclide
model: nuclear reaction
isospin: effect
Delta(1232)
Dalitz plot
angular distribution: asymmetry

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Figures(0)

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Two Nucleon Absorption of π+\pi^+π+ and π−\pi^-π− on 3^{3}3He Across the Δ\DeltaΔ Resonance Region

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Two Nucleon Absorption of $\pi^+$ and $\pi^-$ on $^{3}$ He Across the $\Delta$ Resonance Region