Abstract
We study one-gluon-exchange (OGE) effects ong A /g V of weak semileptonic decay processes of theSU(3) baryon octet. We especially investigate the systematic behavior of OGE effects on all the possible decay processes and search for better overall agreements between theory and experiment. We adopt the MIT bag model to describe quarks confined in a baryon. We also use a formulation of the perturbative QCD in which gluon field is also confined in the bag. Our calculations respect the boundary conditions which achieve the confinement of each field within the bag. The magnitudes of our corrections tog A /g V have a variation of 1 ∼30% depending on the decay, processes. They have process-dependence quite different from that of the uncorrected values ofg A /g V primarily governed by theSU(6) symmetry. These OGE effects ong A /g V reflectSU(6) asymmetric spin-spin correlation between quarks due to the color magnetic interactions. Especially, the OGE corrections tog A /g V are very important in the processes,\(\Sigma ^ - \to n + l^ - + \bar v_l ,\Sigma ^ - \to p + l^ - + \bar v_l \) and\(\Xi ^ - \to \Xi ^0 + e^ - + \bar v_e \). Consequently, we clarify that the OGE effects can sizably improve theoretical values ofg A /g V in favor of overall agreements with the present experimental data of semileptonic decays of the baryon octet, at least, in the MIT bag model.
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References
J.A. Thompson et al.: Phys. Rev.D21, 25 (1980); J. Wise et al.: Phys. Lett.98B, 123 (1981)
P. Keller et al.: Phys. Rev. Lett.48, 971 (1982)
M. Bourquin et al.: Z. Phys. C — Particles and Fields12, 307 (1982); C — Particles and Fields21, 1 (1983); C — Particles and Fields21, 17 (1983)
A. Garcia, P. Kielanowski: Phys. Lett.110B, 498 (1982)
J.F. Donoghue, B.R. Holstein: Phys. Rev.D25, 2015 (1982)
M. Bourquin et al.: Z. Phys. C — Particles and Fields21, 27 (1983)
F.E. Close: An introduction to quarks and partons. London: Academic Press 1979
F. Gursey, L.A. Radicati: Phys. Rev. Lett.13, 173 (1964), A. Pais: Phys. Rev. Lett.13, 175, (1964); B. Sakita: Phys. Rev.136, 1756 (1964)
A. Chodos et al.: Phys. Rev.D9, 3471 (1974)
A. Chodos, R.L. Jaffe, K. Johnson, C.B. Thorn: Phys. Rev.D10 2599 (1974)
Particle Data Group: Rev. Mod. Phys.56, 125 (1984)
T. DeGrand, R.L. Jaffe, K. Johnson, J. Kiskis: Phys. Rev.D12 2060 (1975)
P.N. Bogoliubov: Ann. Inst. H. Poincare8, 163 (1967)
A. De Rujula, H. Georgi, S.L. Glashow: Phys. Rev.D12, 147 (1975)
J.F. Donoghue, E. Golowich: Phys. Rev.D15, 3421 (1977); E. Golowich: Phys. Rev.D18, 927 (1978); I. Yu. Kobzarev, B.V. Martem'yanov, M.G. Shchepkin: Sov. J. Nucl. Phys.30(2), 261 (1979); W-Y.P. Hwang: Z. Phys. C — Particles and Fields16 331 (1983); O.V. Maxwell, V. Vento: Nucl. Phys.A 407, 366 (1983)
K. Ushio, H. Konashi: Phys. Lett.135B, 468 (1984)
J.D. Bjorken, S.D. Drell: Relativistic quantum mechanics. New York: McGraw-Hill 1964
A.R. Edmonds: Angular Momentum in Quantum Mechanics. Princeton: Princeton University Press 1974
J. Baacke, Y. Igarashi, G. Kasperidus: Z. Phys. C — Particles and Fields8, 257 (1981)
J.J.J. Kokkedee: The quark model New York: Benjamin 1969
J.F. Donoghue, B.R. Holstein: Phys. Rev.D25, 206 (1982)
J.F. Donoghue, K. Johnson: Phys. Rev.D21, 1975 (1980; C.W. Wong: Phys. Rev.D24, 1416 (1981)
A. Chodos, C.B. Thorn: Phys. Lett.82B, 177 (1979)
W.M. Gibson, B.R. Pollard: Symmetry principles in elementary particle physics. p. 330. Cambridge: Cambridge University Press 1976
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Ushio, K. One-gluon-exchange effects on semileptonic decay of baryon octet. Z. Phys. C - Particles and Fields 30, 115–124 (1986). https://doi.org/10.1007/BF01560684
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DOI: https://doi.org/10.1007/BF01560684