Quark - anti-quark pair creation effects in the study of S = 0 and S = -1 baryons

Ayat, K.; Watt, A.

doi:10.1016/0375-9474(91)90477-N

Quark - anti-quark pair creation effects in the study of S = 0 and S = -1 baryons

K. Ayat
(
- Glasgow U.
)
,
A. Watt
(
- Glasgow U.
)

1991

13 pages

Published in:

Nucl.Phys.A 535 (1991) 592-604

Published: 1991

DOI:

10.1016/0375-9474(91)90477-N

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Abstract: (Elsevier)

Improved wavefunctions of non-strange and strange baryons are obtained by incorporating quark-antiquark excitations inherent in the quark-gluon interaction into the quark model. The working framework is the shell model where the antiquark is assigned an intrinsic parity quantum number to distinguish it from the quark. The parameters of the interaction are chosen to be consistent with the experimental data. It is found that the amplitudes of the 3 q ( q q ) and 3 q ( q 2 q 2 ) components are not negligible and should be included in the calculation of the properties of the baryons. It is also found that the amplitude of the 3 q ( q q ) component for strange baryons is less than for nonstrange ones, indicating that the hyperon-nucleon(-hyperon) interaction is less attractive than the NN one.

baryon: wave function
hyperon: wave function
quark: pair production
pair production: quark
quark antiquark: excited state
quark gluon: interaction
interaction: quark gluon
shell model: nonrelativistic
numerical calculations: interpretation of experiments
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