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In the reaction :e,p→e,p,η;
(p,η)is called a "baryon resonance",a state of which is "S11(1535)".
(http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.86.1702)
In Particle Data Group,there is an excited nucleon N(1535).Are they the same?
But how could a (p,η)resonce be called excited baryon?
The notation "S11(1535)" ,S means (p,η) orbital angular momentum,what the two "one"s mean?
(p,η)is called a "baryon resonance",a state of which is "S11(1535)".
(http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.86.1702)
In Particle Data Group,there is an excited nucleon N(1535).Are they the same?
But how could a (p,η)resonce be called excited baryon?
The notation "S11(1535)" ,S means (p,η) orbital angular momentum,what the two "one"s mean?