The RNO framework to the σ-particle mass
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✦ hep-ph
keywords
frameworkparticlesigmaeffectiveiso-singletmassnormal-orderingphase
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The "standard" iso-singlet scalar particle $\sigma$ is reconsidered in the reduced normal-ordering (RNO) framework to the effective SU(2) theory. Recent reanalysis of the $\pi\pi$-phase shift [1] is used.
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