Estimate of the Δ(1232) Component in the [sup 12]C Nucleus.

Authors :: Bystritsky, V. M.
Glavanakov, I. V.
Grabmayr, P.
Krechetov, Yu. F.
Saigushkin, O. K.
Tabachenko, A. N.
Fix, A. I.
Schuvalov, E. N.
Source :: JETP Letters; 5/10/2001, Vol. 73 Issue 9, p453, 4p
Publication Year :: 2001
Abstract: The cross section for the [sup 12]C(γ,π[sup +]p) reaction was measured in the range of the Δ(1232) isobar. The data were analyzed using the models taking into account the nucleon and isobaric degrees of freedom of the [sup 12]C nucleus. The conclusion is drawn that in the large-momentum transfer range the π[sup +]p pairs are produced in the course of the direct knocking-out of Δ[sup ++] isobar from the nucleus. The probability of finding the Δ isobar in the ground-state [sup 12]C nucleus is estimated at 0.018±0.005Δ isobars per nucleon. © 2001 MAIK “Nauka / Interperiodica”. [ABSTRACT FROM AUTHOR]