The helicity components σ 1/2 and σ 3/2 of the cross section for double charged-pion production by real photons on a nucleon are calculated within a phenomenological approach developed previously. A high sensitivity of the σ 1/2–σ 3/2 asymmetry to the contribution of nucleon resonances having strongly different electromagnetic helicity amplitudes A 1/2 and A 3/2 is demonstrated. This feature is of importance for seeking “missing” baryon states.
Helicity components of the cross section for double charged-pion production by real photons on protons
RICCO, GIOVANNI;TAIUTI, MAURO GINO;
2003-01-01
Abstract
The helicity components σ 1/2 and σ 3/2 of the cross section for double charged-pion production by real photons on a nucleon are calculated within a phenomenological approach developed previously. A high sensitivity of the σ 1/2–σ 3/2 asymmetry to the contribution of nucleon resonances having strongly different electromagnetic helicity amplitudes A 1/2 and A 3/2 is demonstrated. This feature is of importance for seeking “missing” baryon states.File in questo prodotto:
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