12C(γ,π+n) and 12C(γ,π+p) reactions across the Δ resonance region
- Liang, M.
- Branford, D.
- Davinson, T.
- Johnstone, D.
- MacKenzie, J.A.
- Shotter, A.C,
- Annand, J.R.M.
- Hall, S.J.
- Harty, P.D.
- Kellie, J.D.
- MacGregor, I.J.D.
- McGeorge, J.C.
- Miller, G.J.
- Owens, R.O.
- Yau, T.
- Grabmayr, P.
- Hehl, T.
- Leypoldt, J.
- Lamparter, T.
- Mondry, A.
- Sauer, M.
- Schneider, R.
- Spaeth, K.
- Ahrens, J.
- Beck, R.
DOIAbstract
Differential cross-sections from (gamma,pi+ n) and (gamma,pi+ p) experiments on 12C are presented together with a microscopic model calculation. The comparison of experimental data with theory confirms that quasifree pion production is the dominant process for the (gamma,pi+ n) reaction. The comparison of (gamma,pi+ p) with (gamma,pi+ n) data shows the importance of final state interactions. first time to experimentally study the strength and the possible mechanisms involved in the final state interaction
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