The small axial charge of the N(1535) resonance

Details The small axial charge of the N(1535) resonance The small axial charge of the N(1535) resonance

2008-04-30

arxiv.org/abs/0804.4773v1

Eur.Phys.J.A37:263-265,2008

Physics

Nuclear Physics

Nuclear Theory

5 pages

Scientific paper

10.1140/epja/i2008-10642-2

There is a natural cancellation between the contributions of the $qqq$ and $qqqq\bar q$ components to the axial charge of the N(1535) resonance. While the probability of the former is larger than that of the latter, its coefficient in the axial charge expression is exceptionally small. The magnitude of two of the corresponding coefficients of the $qqqq\bar q$ components are in contrast large and have the opposite sign. This result provides a phenomenological illustration of the recent unquenched lattice calculation result that the axial charge of the N(1535) resonance is very small, if not vanishing \cite{takah}. The result sets an upper limit on the magnitude of the probability of $qqqq\bar q$ components as well.

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