Sigma Signal for Hybrid Baryon Decay

Details Sigma Signal for Hybrid Baryon Decay Sigma Signal for Hybrid Baryon Decay

1997-09-26

arxiv.org/abs/hep-ph/9709470v1

Phys.Lett. B445 (1999) 271-273

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex file

Scientific paper

10.1016/S0370-2693(98)01503-2

We develop an ansatze of the sigma enhancement of the I=0, L=0 $\pi$-$\pi$ scattering amplitude as arising from a low-energy glueball pole. Using this picture we estimate the $\pi^0\pi^0$ to $\pi^0$ branching ratio for the decays of the Roper resonance, which we previously found to be a hybrid in our QCD sum rule calculation. We find that the sigma decay might be a good signal for gluonic components of hadrons.

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