Measurement of the Proton and Deuteron Spin Structure Function g_1 in the Resonance Region

Abstract

We have measured the proton and deuteron spin structure functions g_1^p and g_1^d in the region of the nucleon resonances for W^2 < 5 GeV^2 and $Q^2\simeq 0.5$ and $Q^2\simeq 1.2$ GeV^2 by inelastically scattering 9.7 GeV polarized electrons off polarized ${}^{15}N{H}_3$ and ${}^{15}N{D}_3$ targets. We observe significant structure in g_1^p in the resonance region. We have used the present results, together with the deep-inelastic data at higher W^2, to extract $\Gamma (Q^2)\equiv {\int }_0^1{g}_1(x,Q^2)dx$. This is the first information on the low-Q^2 evolution of Gamma toward the Gerasimov-Drell-Hearn limit at Q^2 = 0.

7 pages, 2 figures

Cited by in corpus (42)

• Measurements of the Proton and Deuteron Spin Structure Functions g1 and g2
• Spin Physics and Polarized Structure Functions
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• Quark-hadron duality in electron scattering
• Quark-Hadron Duality in Electron Scattering
• The Spin Structure of the Nucleon
• Experimental determination of the evolution of the Bjorken integral at low Q^2
• Spin-Dependent Twist-Four Matrix Elements from g_1 Data in the Resonance Region
• The Bjorken Sum Rule in the Analytic Approach to Perturbative QCD
• Determination of the Deep Inelastic Contribution to the Generalised Gerasimov-Drell-Hearn Integral for the Proton and Neutron
• Determination of the Proton Spin Structure Functions for 0.05 < Q^2 < 5 GeV^2 using CLAS
• Moments of the Spin Structure Functions g_1^p and g_1^d for 0.05 < Q^2 < 3.0 GeV^2
• Proton polarizability contribution to the hyperfine splitting in muonic hydrogen
• Quark-Hadron Duality in Spin Structure Functions g1p and g1d
• Proton Spin Structure in the Resonance Region
• Measurement of Inclusive Spin Structure Functions of the Deuteron
• Precise Determination of the Deuteron Spin Structure at Low to Moderate $Q^2$ with CLAS and Extraction of the Neutron Contribution
• Perturbative Duality in the Resonance Spin Structure Functions
• The Gerasimov-Drell-Hearn Sum Rule
• QCD radiative and power corrections and Generalized GDH sum rules
• QCD Corrections to Double and Single Spin Asymmetries in Vector Boson Production at Polarized Hadron Colliders
• QCD corrections to the longitudinally polarized Drell-Yan process
• Semi-Inclusive Charged-Pion Electroproduction off Protons and Deuterons: Cross Sections, Ratios and Access to the Quark-Parton Model at Low Energies
• x-Dependent Polarized Parton Distributions
• Revealing Color Forces with Transverse Polarized Electron Scattering
• The Generalized Gerasimov-Drell-Hearn Integral and the Spin Structure of the Nucleon
• Proton polarizability contribution to the hydrogen hyperfine splitting
• Polarised parton distribution functions and proton spin
• Bjorken sum rule at low Q^2
• Comment on the Burkhardt - Cottingham and Generalized Gerasimov-Drell-Hearn Sum Rules for the neutron
• Generalized polarizabilities and electroexcitation of the nucleon
• Photo-production of Nucleon Resonances and Nucleon Spin Structure Function in the Resonance Region
• The nucleon Drell-Hearn-Gerasimov sum rule within a relativistic constituent quark model
• The elastic contribution to the Burkhardt -- Cottingham and Generalized Gerasimov--Drell-Hearn Sum Rules
• Probing Proton Spin Structure: A Measurement of g2p at Four-momentum Transfer of 2 to 6 GeV^2
• Modeling quark-hadron duality in polarization observables
• The QCD running coupling at all scales and the connection between hadron masses and Λ_s
• The Systematical Uncertainties in Measurements of the Spin-Dependent Structure Function g1n with He-3 Target due to Radiative Correction Procedure
• Measurement of the nucleon spin structure functions for 0.01<$Q^2$<1 GeV${}^2$ using CLAS
• Transverse Spin Structure Function g2(x, Q2 ) in the Valon model
• New Observables for Parity Violation in Atoms: Energy Shifts in External Electric Fields
• The correction of hadronic nucleus polarizability to hyperfine structure of light muonic atoms