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Quark; confinement; vertex function; quark-pion coupling constant; chiral symmetry

Incorporating chiral-symmetry to the potential model of quarks with confining potentialU(r)=1/2 (1 +γ°)ar² with m_q=10 MeV anda=2.273 fm⁻³ that gives a reasonable quark-core contribution to μ_p, 〈r² 〉_p^1/2 andg_A, the quark-pion coupling constant for quarks in a nucleon is estimated.G_qqπ²/4π obtained between 0.4 and 0.5 is consistent with those extracted from experimental vector meson decay-width ratios by Suzuki and Bhaduri. The nucleon-pion coupling constantG_NNπ²/4π comes out to be of the order of 13.1 in reasonable agreement with the experimental value.

N Barik¹ B K Dash^{1 2}

1. Department of Physics, Utkal University, Bhubaneswar - 751 004, India
2. Department of Physics, S.C.S. College, Puri - 753 001, India

Published

May 1985

Manuscript received

30 October 1984

Manuscript revised

11 February 1985