On baryon semileptonic decays

P. Bracken; A. Frenkel; G. Karl

doi:10.1103/PhysRevD.24.2984

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On baryon semileptonic decays

P. Bracken, A. Frenkel^*, and G. Karl

Department of Physics, University of Guelph, Guelph, Ontario, Canada N1G 2W1

^*On leave from the Central Research Institute for Physics, Budapest, Hungary.

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Phys. Rev. D 24, 2984 – Published 1 December, 1981

DOI: https://doi.org/10.1103/PhysRevD.24.2984

Abstract

We make comments on baryon semileptonic decays motivated by recent work on quark models. We find the decay rate of $Λ_{c} \to Λ \bar{e} ν$ to be reduced by a factor of 2 from its naive value due to wave-function distortion and form-factor effects. Configuration mixing implies the value of ±0.04 for the vector-to-axial-vector ratio in $Σ^{\pm} \to Λ β$ decay. Small changes in S $U_{6}$ predictions due to configuration mixing are also discussed. The Appendix describes a very simple method of evaluation of the axial-vector-to-vector ratio in the symmetric quark model with static quarks.

References (14)

Nathan Isgur, in New Aspects of Subnuclear Physics, edited by A. Zichichi (Plenum, New York, 1980), pp. 107-203 G. Karl, in Proceedings of the 19th International Conference on High Energy Physics, Tokyo, 1978, edited by S. Homma, M. Kawaguchi, and H. Miyazawa (Phys. Soc. of Japan, Tokyo, 1979), p. 135
Nathan Isgur and Gabriel Karl, Phys. Lett. 74B, 353 (1978) U. Ellwanger, Nucl. Phys. B139, 422 (1978) A. Le Yaouanc et al., Phys. Rev. D 18, 1591 (1978)
Nathan Isgur and Gabriel Karl, Phys. Lett. 72B, 109 (1978) D. Gromes and I. O. Stamatescu, Nucl. Phys. B112, 213 (1976) R. Carlitz, S. D. Ellis, and R. Savit, Phys. Lett. 68B, 443 (1977)
N. Cabibbo, Phys. Rev. Lett. 10, 531 (1963)
Nathan Isgur [Phys. Rev. D 12, 3666 (1975)]
A. F. Buras, Nucl. Phys. B109, 373 (1976)
N. Cabibbo and R. Gatto, Nuovo Cimento 15, 159 (1960) V. P. Belov, B. S. Mingalev, and V. M. Shekhter, Zh. Eksp. Teor. Fiz. 38, 541 (1960) [Sov. Phys. JETP 11, 392 (1960)]
J. A. Thompson et al., Phys. Rev. D 21, 25 (1980) W. Tanenbaum et al., ibid. 12, 1871 (1975)
R. H. Dalitz and F. von Hippel, Phys. Lett. 10, 153 (1964) A. J. MacFarlane and E. C. G. Sudarshan, Nuovo Cimento 31, 1176 (1964)
Nathan Isgur, Phys. Rev. D 21, 779 (1980)
Nathan Isgur and Gabriel Karl, Phys. Rev. D 21, 3175 (1980)
Nathan Isgur, Gabriel Karl, and Roman Koniuk, Phys. Rev. Lett. 44, 1269 (1978)
Cameron Hayne and Nathan Isgur, Toronto report, 1981 (unpublished)
J. Franklin, Phys. Rev. 172, 1807 (1968) N. Isgur and G. Karl, Phys. Rev. D 18, 4187 (1978)

[c1] Nathan Isgur, in New Aspects of Subnuclear Physics, edited by A. Zichichi (Plenum, New York, 1980), pp. 107-203 G. Karl, in Proceedings of the 19th International Conference on High Energy Physics, Tokyo, 1978, edited by S. Homma, M. Kawaguchi, and H. Miyazawa (Phys. Soc. of Japan, Tokyo, 1979), p. 135

[c2] Nathan Isgur and Gabriel Karl, Phys. Lett. 74B, 353 (1978) U. Ellwanger, Nucl. Phys. B139, 422 (1978) A. Le Yaouanc et al., Phys. Rev. D 18, 1591 (1978)

[c3] Nathan Isgur and Gabriel Karl, Phys. Lett. 72B, 109 (1978) D. Gromes and I. O. Stamatescu, Nucl. Phys. B112, 213 (1976) R. Carlitz, S. D. Ellis, and R. Savit, Phys. Lett. 68B, 443 (1977)

[c4] N. Cabibbo, Phys. Rev. Lett. 10, 531 (1963)

[c5] Nathan Isgur [Phys. Rev. D 12, 3666 (1975)]

[c6] A. F. Buras, Nucl. Phys. B109, 373 (1976)

[c7] N. Cabibbo and R. Gatto, Nuovo Cimento 15, 159 (1960) V. P. Belov, B. S. Mingalev, and V. M. Shekhter, Zh. Eksp. Teor. Fiz. 38, 541 (1960) [Sov. Phys. JETP 11, 392 (1960)]

[c8] J. A. Thompson et al., Phys. Rev. D 21, 25 (1980) W. Tanenbaum et al., ibid. 12, 1871 (1975)

[c9] R. H. Dalitz and F. von Hippel, Phys. Lett. 10, 153 (1964) A. J. MacFarlane and E. C. G. Sudarshan, Nuovo Cimento 31, 1176 (1964)

[c10] Nathan Isgur, Phys. Rev. D 21, 779 (1980)

[c11] Nathan Isgur and Gabriel Karl, Phys. Rev. D 21, 3175 (1980)

[c12] Nathan Isgur, Gabriel Karl, and Roman Koniuk, Phys. Rev. Lett. 44, 1269 (1978)

[c13] Cameron Hayne and Nathan Isgur, Toronto report, 1981 (unpublished)

[c14] J. Franklin, Phys. Rev. 172, 1807 (1968) N. Isgur and G. Karl, Phys. Rev. D 18, 4187 (1978)

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On baryon semileptonic decays

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