Don't Forget to Measure $\Delta s$

Abstract

This talk explores our lack of knowledge of the strange quark contribution to the nucleon spin, $\Delta s$. Data on $\Delta s$ from inclusive and semi-inclusive polarized deep-inelastic scattering will be reviewed, followed by a discussion of how the ongoing program of parity-violating elastic electron-nucleon scattering experiments, that seek out the strange electromagnetic form factors of the nucleon, need to have an estimate for the strange axial form factor to carry out that program, and how the value of $\Delta s$ extracted from the DIS experiments has filled that role. It is shown that elastic $\nu p$, $\bar{\nu }p$, and parity-violating $\vec{e}p$ data can be combined to extract the strange electric, magnetic $and$ axial form factors simultaneously. A proposed experiment that could address this important issue if briefly previewed.

4 pages, to appear in proceedings in PAVI04, Eur. Jour. Phys

References in corpus (7)

• The Strange Quark Contribution to the Proton's Magnetic Moment
• Precise determination of the strangeness magnetic moment of the nucleon
• Parity-violating Electron Deuteron Scattering and the Proton's Neutral Weak Axial Vector Form Factor
• Flavor decomposition of the sea quark helicity distributions in the nucleon from semi-inclusive deep-inelastic scattering
• Determination of the strange form factors of the nucleon from $\nu p$, $\bar{\nu }p$, and parity-violating $\vec{e}p$ elastic scattering
• Recoil Order Chiral Corrections to Baryon Octet Axial Currents and Large $N_c$ QCD
• A Proposal for a Near Detector Experiment on the Booster Neutrino Beamline: FINeSSE: Fermilab Intense Neutrino Scattering Scintillator Experiment

Cited by in corpus (8)

• Charged Current Neutrino Nucleus Interactions at Intermediate Energies
• Inclusive Nucleon Emission Induced by Quasi--Elastic Neutrino--Nucleus Interactions
• Neutral current neutrino-nucleus interactions at intermediate energies
• Strangeness asymmetry of the nucleon in the statistical parton model
• Ambiguities of neutrino(antineutrino) scattering on the nucleon due to the uncertainties of relevant strangeness form factors
• Helicity asymmetries in neutrino-nucleus interactions
• The Paschos-Wolfenstein relation in a hadronic picture
• Signals for strange quark contributions to the neutrino (antineutrino) scattering in quasi-elastic region