The elastic scattering and charge-exchange of pions by 3He at intermediate energies

Belyaev, V.B.; Rakityansky, S. A.; Wrzecionko, J.

doi:10.1016/0375-9474(81)90763-6

Cited by 1 publication

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“…Though this seems to be mathematically sound, such a two body t-matrix can have physically undesired features. For example, in [17] it was found from a phase shift study that such a two-body t-matrix may not display the resonant behaviour which it would be expected to. In the same work, in connection with π-nucleus scattering, it was found that considering a free two-body matrix simulated the contribution of continuum states (otherwise neglected in that work) and brought theory in closer agreement with data.…”

Section: Kinematics Of the Many Body Problemmentioning

confidence: 99%

Eta meson rescattering effects in the reaction near threshold

2009

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The p + 6 Li → η + 7 Be reaction has been investigated with an emphasis on the η meson and 7 Be interaction in the final state. Considering the 6 Li and 7 Be nuclei to be α-d and α-3 He clusters respectively, the reaction is modelled to proceed via the p + d[α] → 3 He[α] + η reaction with the α remaining a spectator. The η meson interacts with 7 Be via multiple scatterings on the 3 He and α clusters inside 7 Be. The individual η-3 He and η-α scatterings are evaluated using few body equations for the η-3N and η-4N systems with a coupled channel η-N interaction as an input. Calculations including four low-lying states of 7 Be lead to a double hump structure in the total cross section corresponding to the L = 1 (J = (1/2) − , (3/2) − ) and L = 3 (J = (5/2) − , (7/2) − ) angular momentum states. The humps arise due to the off-shell rescattering of the η meson on the 7 Be nucleus in the final state.

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Section: Kinematics Of the Many Body Problemmentioning

confidence: 99%