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Title: Measurement of the Proton and Deuteron Spin Structure Function {ital g}{sub 1} in the Resonance Region

Journal Article · · Physical Review Letters
OSTI ID:488763
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  1. The American University, Washington, D.C. 20016 (United States)
  2. Institut fuer Physik der Universitaet Basel, CH-4056 Basel (Switzerland)
  3. LPC IN2P3/CNRS, University Blaise Pascal, F-63170 Aubiere Cedex (France)
  4. TJNAF, Newport News, Virginia 23606 (United States)
  5. DAPNIA-Service de Physique Nucleaire Centre d`Etudes de Saclay, F-91191 Gif-Yvette (France)
  6. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
  7. University of Massachusetts, Amherst, Massachusetts 01003 (United States)
  8. University of Michigan, Ann Arbor, Michigan 48109 (United States)
  9. Naval Postgraduate School, Monterey, California 93943 (United States)
  10. Old Dominion University, Norfolk, Virginia 23529 (United States)
  11. University of Pennsylvania, Philadelphia, Pennsylvania 19104 (United States)
  12. Stanford Linear Accelerator Center, Stanford, California 94309 (United States)
  13. Stanford University, Stanford, California 94305 (United States)
  14. Temple University, Philadelphia, Pennsylvania 19122 (United States)
+ Show Author Affiliations

We have measured the proton and deuteron spin structure functions g{sup p}{sub 1} and g{sup d}{sub 1} in the region of the nucleon resonances for W{sup 2}{lt}5 GeV{sup 2} and Q{sup 2}{approx_equal}0.5 and Q{sup 2}{approx_equal}1.2 GeV{sup 2} by inelastically scattering 9.7 GeV polarized electrons off polarized {sup 15}NH{sub 3} and {sup 15}ND{sub 3} targets. We observe significant structure in g{sup p}{sub 1} in the resonance region. We have used the present results, together with the deep-inelastic data at higher W{sup 2}, to extract {Gamma}(Q{sup 2}){equivalent_to}0=g{sub 1}(x,Q{sup 2})dx. This is the first information on the low-Q{sup 2} evolution of {Gamma} toward the Gerasimov-Drell-Hearn limit at Q{sup 2}=0. {copyright} {ital 1997} {ital The American Physical Society}

OSTI ID:
488763
Journal Information:
Physical Review Letters, Vol. 78, Issue 5; Other Information: PBD: Feb 1997
Country of Publication:
United States
Language:
English

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Related Subjects

66 PHYSICS
PROTONS
STRUCTURE FUNCTIONS
DEUTERONS
AMMONIA
ELECTRON REACTIONS
POLARIZED TARGETS
ELECTRON BEAMS
SPIN
INELASTIC SCATTERING
POLARIZED BEAMS
RESONANCE
MOMENTUM TRANSFER