Abstract
We report on a calculation of the dilute instanton liquid contribution to the strangeness in the proton. Specifically, we express the proton matrix elements of strange-quark operators in terms of a model valence nucleon state and the strangeness producing interactions. This enables us to evaluate the strangeness in different Lorentz channels in the same way. We find that in the context of the MIT bag model only the scalar strangeness is induced by the random instanton liquid. We discuss these results in the light of the recent experiments.
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T. P. Cheng: Phys. Rev. D13 (1976) 2161.
A. R. Zhitnitsky: Phys. Rev. D55 (1997) 3006, hep-ph/9604314.
L. A. Ahrens et al.: Phys. Rev. D35 (1987) 785.
J. Ashman et al. (EMC Collab.): Phys. Lett. 206B (1988) 364.
J. Ashman et al. (EMC Collab.): Nucl. Phys. B328 (1989) 1.
J. Ellis and M. Karliner: Phys. Lett. B341 (1995) 397, hep-ph/9407287.
J. F. Donoghue and C. R. Nappi: Phys. Lett. 168B (1986) 105.
M. A. Nowak, J. J. M. Verbaarschot, and I. Zahed: Phys. Lett. B217 (1989) 157.
B. L. Ioffe and M. Karliner: Phys. Lett. B247 (1990) 387.
D. Klabučar and I. Picek: Nucl. Phys. A514 (1990) 689.
R. Decker, M. Nowakowski and U. Wiedner: Fortschr. Phys. 41 (1993) 87.
S.-J. Dong and K.-F. Liu: Nucl. Phys. Proc. Suppl. 42 (1995) 322, hep-lat/9412059.
K. Steininger and W. Weise: Phys. Lett. B329 (1994) 169, hep-ph/9402250.
H. Forkel, M. Nielsen, X. min Jin, and T. D. Cohen: Phys. Rev. C50 (1994) 3108, hep-ph/9408326.
M. J. Musolf and M. Burkardt: Z. Phys. C61 (1994) 433, hep-ph/9301229.
S. J. Dong, J. F. Lagae, and K. F. Liu: Phys. Rev. D54 (1996) 5496, hep-ph/9602259.
P. Geiger and N. Isgur: Phys. Rev. D55 (1997) 299, hep-ph/9610445.
D. Klabučar, K. Kumerički, B. Melić, and I. Picek: Eur. Phys. J. C9 (1999) 589, hep-ph/9807357.
D. Klabučar, K. Kumerički, B. Melić, and I. Picek: (1999), submitted to Fizika B.
H. Hellmann: Einführung in die Quantenchemie, Deuticke, Leipzig (1937).
R. P. Feynman: Phys. Rev. 56 (1939) 340.
X. Ji and J. Tang: Phys. Lett. B362 (1995) 182, hep-ph/9507465.
A. O. Bazarko et al., Z. Phys. C65 (1995) 189, hep-ex/9406007.
B. V. Geshkenbein and B. L. Ioffe: Nucl. Phys. B166 (1980) 340.
D. I. Diakonov and V. Y. Petrov: Nucl. Phys. B245 (1984) 259.
D. I. Diakonov and V. Y. Petrov: Nucl. Phys. B272 (1986) 457.
E. V. Shuryak: The QCD Vacuum, Hadrons and the Superdense Matter, World Scientific, Singapore (1988).
M. A. Nowak, J. J. M. Verbaarschot, and I Zahed: Nucl. Phys. B324 (1989) 1.
E. V. Shuryak: Nucl. Phys. B203 (1982) 93.
M. A. Shifman, A. I. Vainshtein, and V. I. Zakharov: Nucl. Phys. B163 (1980) 46.
M. A. Nowak: Acta Phys. Polon. B22 (1991) 697.
D. Klabučar: Phys. Rev. D49 (1994) 1506, hep-ph/9312344.
B. Mueller et al. (SAMPLE Collab.): Phys. Rev. Lett. 78 (1997) 3824, nuclex/9702004.
K. A. Aniol et al. (HAPPEX Collab.): Phys. Rev. Lett. 82 (1999) 1096, nuclex/9810012.
K. Ackerstaff et al. (HERMES Collab.): (1999), hep-ex/9906035.
R. Kaiser: (199), talk at this workshop.
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Talk given by K. Kumericki (e-mail:kkumer@phy.hr) at the International workshop Symmetry and spin, SPIN99, Prague, September, 5–12, 1999
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Klabucar, D., Kumericki, K., Picek, I. et al. Proton strangeness induced by instantons. Czech J Phys 50 (Suppl 1), 187–192 (2000). https://doi.org/10.1007/s10582-000-0024-y
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DOI: https://doi.org/10.1007/s10582-000-0024-y