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.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11567/392227
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