Stranger Still: Kaon Loops and Strange Quark Matrix Elements of the Nucleon

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Instrinsic strangeness contributions to low-energy strange quark matrix elements of the nucleon are modelled using kaon loops and meson-nucleon vertex functions taken from nucleon-nucleon and nucleon-hyperon scattering. A comparison with pion loop contributions to the nucleon electromagnetic (EM) form factors indicates the prsence of significant SU-(3)-breaking in the mean-square charge radii. As a numerical consequence, the kaon loop contribution to the mean square Sachs strangeness radius is significantly smaller than could be observed with parity-violating elastic ep experiments planned for CEBAF, while the contribution to the Sachs radius is large enough to be observed with PV electron scattering from (0+, ... continued below

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page(s) 433-440

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Ramsey-Musolf, Michael & Burkardt, Matthias January 1, 1993.

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Instrinsic strangeness contributions to low-energy strange quark matrix elements of the nucleon are modelled using kaon loops and meson-nucleon vertex functions taken from nucleon-nucleon and nucleon-hyperon scattering. A comparison with pion loop contributions to the nucleon electromagnetic (EM) form factors indicates the prsence of significant SU-(3)-breaking in the mean-square charge radii. As a numerical consequence, the kaon loop contribution to the mean square Sachs strangeness radius is significantly smaller than could be observed with parity-violating elastic ep experiments planned for CEBAF, while the contribution to the Sachs radius is large enough to be observed with PV electron scattering from (0+, 0) nuclei. Kaon loops generate a strange magnetic moment of the same scale as the isoscalar EM magnetic moment-a scale large enough to be observed at CEBAF-and a strange axial vecctor form factor having roughly one-third of the magnitude extracted from vp/vp elastic scattering

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page(s) 433-440

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  • Journal Name: Zeitschrift fuer Physik C; Journal Volume: 61

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  • Report No.: CEBAF-TH-93-01
  • Report No.: hep-ph/9301229
  • Grant Number: AC05-84ER40150
  • Office of Scientific & Technical Information Report Number: 954375
  • Archival Resource Key: ark:/67531/metadc931991

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • January 1, 1993

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 2, 2016, 12:45 p.m.

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Ramsey-Musolf, Michael & Burkardt, Matthias. Stranger Still: Kaon Loops and Strange Quark Matrix Elements of the Nucleon, article, January 1, 1993; [Newport News, Virginia]. (digital.library.unt.edu/ark:/67531/metadc931991/: accessed June 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.