Pion nucleon coupling constant, Goldberger-Treiman discrepancy and πN σ term
Nagy, Miroslav · Scadron, Michael D. · Hite, Gerald E.
Original · EN
We start by studying the Goldberger-Treiman discrepancy (GTd) Δ= (2.259± 0.591)%. Then we look at the πN σ term, with the dimensionless ratio σₙ/2mₙ=3.35%. Finally we return to predicting (via the quark model) the πN coupling constant, with GTd Δ→ 0 as mq→ mₙ/3.
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