Published December 15, 2000
| Version v1
Journal article
Strange magnetism and the anapole structure of the proton
Creators
- Hasty, R.1
- Beck, D.H.1
- Danagoulian, A.1
- Blake, A.2
- Carr, R.2
- Covrig, S.2
- Filipoone, B.W.2
- Ito, T.M.2
- Gao, J.2
- Jones, C.E.2
- Lee, P.2
- McKeown, R.D.2
- Savu, V.2
- Beise, E.J.3
- Breuer, H.3
- Spayde, D.T.3
- Tieulent, R.3
- Herda, M.C.3
- Barkhuff, D.4
- Dodson, G.4
- Dow, K.4
- Farkhondeh, M.4
- Kowalski, S.4
- Tsentalovich, E.4
- Yang, B.4
- Zwart, T.4
- Hawthorne-Allen, A.M.5
- Pitt, M.5
- Ritter, J.5
- Korsch, W.6
- Mueller, B.7
- Wells, S.P.8
- Averett, T.9
- Roche, J.9
- Kramer, K.9
- Argonne National Laboratory (United States)
- 1. Department of Physics, University of Illinois at Urbana-Champaign, Urbana, IL (United States)
- 2. Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, CA (United States)
- 3. Department of Physics, University of Maryland, College Park, MD (United States)
- 4. Bates Linear Accelerator Center, Laboratory for Nuclear Science and Department of Physics, Massachusetts Institute of Technology, Cambridge, MA (United States)
- 5. Department of Physics, Virginia Polytechnic Institute and State University, Blacksburg, VA (United States)
- 6. Department of Physics and Astronomy, University of Kentucky, Lexington, KY (United States)
- 7. Physics Division, Argonne National Laboratory, Argonne, IL (United States)
- 8. Department of Physics, Louisiana Tech University, Ruston, LA (United States)
- 9. Department of Physics, College of William and Mary, Williamsburg, VA (United States)
Description
The violation of mirror symmetry in the weak force provides a powerful tool to study the internal structure of the proton. Experimental results have been obtained that address the role of strange quarks in generating nuclear magnetism. The measurement reported here provides an unambiguous constraint on strange quark contributions to the proton's magnetic moment through the electron-proton weak interaction. We also report evidence for the existence of a parity-violating electromagnetic effect known as the anapole moment of the proton. The proton's anapole moment is not yet well understood theoretically, but it could have important implications for precision weak interaction studies in atomic systems such as cesium.
Additional details
Identifiers
Publishing Information
- Journal Title
- Science (Washington, D.C., 1979-)
- Journal Volume
- 290
- Journal Issue
- 5499
- Journal Page Range
- p. 2117-2119
- ISSN
- 0193-4511
- CODEN
- SCEHDK
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 41029764
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- CESIUM; ELECTRON-PROTON INTERACTIONS; MAGNETIC MOMENTS; MAGNETISM; NUCLEAR MAGNETISM; QUARKS; SYMMETRY; VIOLATIONS; WEAK INTERACTIONS
- Descriptors DEC
- ALKALI METALS; BASIC INTERACTIONS; ELECTRON-NUCLEON INTERACTIONS; ELEMENTS; FERMIONS; INTERACTIONS; LEPTON-BARYON INTERACTIONS; LEPTON-HADRON INTERACTIONS; LEPTON-NUCLEON INTERACTIONS; MAGNETISM; METALS; PARTICLE INTERACTIONS
Optional Information
- Contract/Grant/Project number
- AC02-06CH11357
- Notes
- doi 10.1126/science.290.5499.2117
- Funding organization
- USDOE Office of Science (United States); National Science Foundation (United States)
- Secondary number(s)
- ANL/PHY/JA--36626