Abstract
As stimulated by earlier attempts for obtaining theπNN andπNδ form factors from the deep inelastic lepton scattering data, we extend the analysis by taking into account effects of additional mesons includingρ, Ω, σ,K, andK *, with the coupling constants fixed by the lowenergy nucleon-nucleon and hyperon-nucleon scattering data. Contrary to an earlier claim that theπ NN andπNδ form factor must be very soft (e.g., with the cutoff mass less than 500 MeV in the monopole form), we find, for example, that with all form factors parametrized in the dipole form, a universal cutoff mass of 1150 MeV in theδ/N sector and 1400 MeV in theλ/σ sector yields predictions in excellent agreement with recently published neutrino data on the momentum fractions carried by thes, Ū, and¯d quarks, as well as consistent with the sea-to-valence ratio extracted from the CDHS data and the Femilab E615 experiment. Similar results can also be obtained by using exponential cutoffs for all couplings, or by using monopole forms for some vertices while retaining dipole forms for the rest. The success of the mesonexchange picture in generating the strangeness content in a proton suggests an alternative understanding of the origin of sea quarks in the proton.
Similar content being viewed by others
References
Sullivan, J.D.: Phys. Rev. D5, 1732 (1972)
Thomas, A.W.: Phys. Lett.126B, 97 (1983)
Frankfurt, L.L., Mankiewicz, L., Strikman, M.I.: Z. Phys. A — Atomic Nuclei334, 343 (1989)
Foudas, C. et al.: CCFR Coll., Phys. Rev. Lett.64, 1207 (1990)
MacFarlane, D. et al.: Z. Phys. C — Particles and Fields26, 1 (1984); Oltman, E.: In: The Storrs Meeting: Proceedings of the Division of Particles and Fields of the American Physical Society, 1988, Hall, K. et al. (eds.). Singapore: World Scientific 1989
Field, R.D., Feynman, R.P.: Phys. Rev. D15, 2590 (1977)
Holzenkamp, B., Holinde, K., Speth, J.: Nucl. Phys. A500, 485 (1989)
Harriman, P.N., Martin, A.D., Sterling, W.J., Roberts, R.G.: Phys. Rev. D42, 758 (1990)
Peccei, R.D.: Phys. Rev.176, 1812 (1968);181, 1902 (1969)
Hwang, W-Y.P., Walker, G.E.: Ann. Phys. (New York)159, 118 (1985)
Ahrens, L.A. et al.: Phys. Rev. D35, 785 (1987)
Badier, J. et al.: Z. Phys.18, 281 (1983)
Badier, J. et al.: Phys. Lett.93B, 354 (1980)
Duke, D.W., Owens, J.F.: Phys. Rev. D30, 49 (1984)
Eichten, E., Hinchliffe, I., Lane, K., Quigg, C.: Rev. Mod. Phys.56, 579 (1984); Erratum:58, 1065 (1986)
Abramowicz, H. et al.: CDHS Coll., Z. Phys. C — Particles and Fields17, 283 (1983)
Heinrich, J.G. et al.: E615 Coll., Phys. Rev. Lett.63, 356 (1989)
Aubert, J.J. et al.: Phys. Lett.123B, 275 (1983); Landgraf, U., New Muon Coll.: Nuclear Effects in Deep Inelastic Scattering. Talk at PANIC XII, M.I.T. 1990
Güttner, E., Chanfray, G., Pirner, H.J., Povh, B.: Nucl. Phys. A429, 389 (1984)
Holinde, K., Thomas, A.W.: Phys. Rev. C42, 1195 (1990) and private communications
Deister, S., Gari, M., Krümpelmann, W., Mahlke, M.: Preprint and private communications
Holinde, K.: Phys. Lett.111B, 266 (1982)
Alde, D.M. et al.: E772 Coll.: Phys. Rev. Lett.64, 2749 (1990)
Llewellyn Smith, C.H.: Phys. Lett.128B, 107 (1983); Ericson, M., Thomas, A.W.:Phys. Lett.128B, 112 (1983): Ericson, M.: Erice lectures 1983, Prog. Part. Nucl. Phys.11, 277 (1984); Thomas, A.W.: Erice lectures 1983, Prog. Part. Nucl. Phys.11, 325 (1984); Berger, E.L., Coester, F., Wiringa, R.B.: Phys. Rev. D29, 398 (1984); Stump, D., Bertsch, G.F., Pumplin, J.: Hadron Substructure in Nuclear Physics, p. 339. New York: American Institute of Physics 1984
Brown, G.E.: Matter under extreme conditions. Talk at the Arima Conference, Santa Fe, New Mexico 1990
Hwang, W-Y.P., Speth, J., Wambach, J., Brown, G.E.: Work in progress
Windmolders, R., NMC Coll.: Contribution to PANIC XII, M.I.T., 1990
Author information
Authors and Affiliations
Additional information
We wish to thank G. Garvey, K. Holinde, L.-C. Liu, M. B. Johnson, M. Strikman, A. W. Thomas and Jochen Wambach for helpful conversations. W-Y. P. Hwang wishes to acknowledge the Alexander von Humboldt Foundation for a fellowship to visit Jülich for conducting research. His research works was also supported in part by the National Science Council of the Republic of China. The work of G. E. Brown is supported in part by a Humboldt award, in part by NATO Grant RG85/0093, and in part by the U.S. Department of Energy.
Rights and permissions
About this article
Cite this article
Hwang, W.Y.P., Speth, J. & Brown, G.E. Hard form factors for meson-baryon strong couplings as derived from deep inelastic lepton scattering. Z. Physik A - Hadrons and Nuclei 339, 383–389 (1991). https://doi.org/10.1007/BF01560641
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF01560641