1202.4849 (I. V. Glavanakov et al.)

The photoproduction of the $πN$ pair on the nuclei and the isobar
configurations    [PDF]

I. V. Glavanakov, A. N. Tabachenko

The model of the $\pi N$ pair photoproduction on the nuclei at the high
momentum transfer was presented. The amplitude of the process $A(\gamma,\pi
N)B$ was received by means of the extended impulse approximation, according to
which nucleus, besides the nucleon components, includes also the delta-isobar
degrees of freedom. One-particle operator of the transition was defined by
amplitudes of the elementary processes $\gamma N\rightarrow\pi N$ and $\gamma
\Delta\rightarrow\pi N$. The direct and exchange mechanisms of the reaction
were analysed. The numerical estimations of the differential cross section of
the $^{12}$C$({\gamma ,^{}\pi ^{-} p})^{11}$C and $^{12}$C$({\gamma ,\pi ^{+}
p})^{11}$Be reactions were given.

View original: http://arxiv.org/abs/1202.4849