Measurement of the Λ→<i>n</i>+γ branching ratio

Noble, A. J.; Larson, K. D.; Bassalleck, B.; Fickinger, W.; Hall, J. R.; Hallin, A. L.; Hasinoff, M.; Horváth, D.; Lowe, J.; McIntyre, E. K.; Measday, D.F.; Miller, J.; Roberts, B. L.; Robinson, D. K.; Sakitt, M.; Salomon, M.; Waltham, C. E.; Warner, T. M.; Whitehouse, D.; Wolfe, D.

doi:10.1103/physrevlett.69.414

Cited by 13 publications

(1 citation statement)

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“…For the pions (P = P π ) only the T r(P † SB † f B i ) and T r(P † SB i B † f ) traces in Eqs. (22)(23)(24)(25) are nonzero. Consequently, the pion-emission amplitudes are:…”

Section: Quark Sea Effects In S-wavesmentioning

confidence: 99%

Weak hyperon decays: Quark sea and SU(3) symmetry breaking

Żenczykowski

1994

Phys. Rev. D

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An explanation of the difference in the values of the apparent f /d ratios for the S-and P-wave amplitudes of nonleptonic hyperon decays is proposed. The argument is formulated in the framework of the standard pole model with (56,O') ground-state and (70, I -) excited baryons as intermediate states for the P and S waves, respectively. Under the assumption that the dominant part of the deviation of (f /dl, , , , , from -1 is due to large quark sea effects, SU(3) symmetry breaking in energy denominators is shown to lead to a prediction for (f /dls , , , , which is in excellent agreement with experiment. This corroborates our previous unitarity calculations which indicated that the matrix elements ( BIH:& lB' ) of the parity-conserving weak Hamiltonian between the ground-state baryons are characterized by fo/do= -1.6 or more. A brief discussion of the problem of the relative size of S-and P-wave amplitudes is given. Finally, implications for weak radiative hyperon decays are also discussed.

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“…For the pions (P = P π ) only the T r(P † SB † f B i ) and T r(P † SB i B † f ) traces in Eqs. (22)(23)(24)(25) are nonzero. Consequently, the pion-emission amplitudes are:…”

Section: Quark Sea Effects In S-wavesmentioning

confidence: 99%