On the extraction of the quark mass ratio (m_d - m_u)/m_s from Gamma(eta' -> pi^0 pi^+ pi^-)/Gamma(eta' -> eta pi^+ pi^-)

B. Borasoy; R. Ni{\ss}ler; Ulf-G. Mei{\ss}ner

On the extraction of the quark mass ratio (m_d - m_u)/m_s from Gamma(eta' -> pi^0 pi^+ pi^-)/Gamma(eta' -> eta pi^+ pi^-)

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arxiv hep-ph/0609010 v1 pith:QTRGUS7F submitted 2006-09-01 hep-ph hep-exnucl-exnucl-th

B. Borasoy , Ulf-G. Mei{ss}ner , R. Ni{ss}ler This is my paper · ORCID

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The claim that the light quark mass ratio (m_d - m_u)/m_s can be extracted from the decay width ratio Gamma(eta' -> pi^0 pi^+ pi^-)/Gamma(eta' -> eta pi^+ pi^-) is critically investigated within a U(3) chiral unitary framework. The influence of the recent VES data on the eta' -> eta pi^+ pi^- decay is also discussed.

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Novel method for determining the light quark mass ratio using $\eta'\to\eta \pi\pi$ decays
hep-ph 2025-02 conditional novelty 7.0 of 10

A novel unit-disk mapping of Dalitz plots is used to extract the light quark mass ratio Q = 22.3 ± 0.7 from BESIII data on η′ → ηππ decays.

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