Sigma Signal for Hybrid Baryon Decay

Abstract

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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Cited by in corpus (8)

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• Pomeron and Reggeized Glueball/Sigma
• The $\Lambda$(1600): A Strange Hybrid Baryon
• Single and Double Peripheral Production of Sigmas in Proton Proton Collisions
• Hybrid Charmonium and the $\rho -\pi$ Puzzle
• Sigma and Pion Decays of Mixed Heavy Hybrids