The neutron magnetic form factor G_M^n(Q^2) from Quasi-Elastic inclusive scattering data on D and 4He

Abstract

We analyze cross sections for Quasi-Elastic inclusive scattering of electrons on nuclei and show that the observed isolated peaks for relatively low $Q^2$ are unique for the lightest targets. Focusing in particular on D and ${}^4$He, we investigate in two ways to what measure the above peaks can be allocated to nucleon-elastic processes. We first compute approximate upper limits for the nucleon-inelastic background in the Quasi-Elastic region due to inclusive $\Delta$ excitation, and find those to be small. Far more precise is a semi-phenomenological approach, where the dominance of nucleon-elastic processes is translated into a set of stringent requirements. We show that those are very well fulfilled for recent D data, and to a somewhat lesser extent for older D and ${}^4$He data. With knowledge of $G_{E,M}^p$ and information on $G_E^n$, we then extract $G_M^n$ and find agreement with values obtained by alternative methods. We discuss the sensitivity of the extraction method and mention future applications.

21 pages, 9 figures, revtex4, revised version, Phys. Rev. C, in press

References in corpus (21)

• The ratio of proton's electric to magnetic form factors measured by polarization transfer
• Benchmark Test Calculation of a Four-Nucleon Bound State
• Measurement of the proton and the deuteron structure functions F2p and F2d
• Precise Neutron Magnetic Form Factors
• The Transverse Asymmetry ${\mathbf{A}}_{{\mathbf{T}}^{\prime }}$ from Quasi-elastic ${}^3\overrightarrow{\mathrm{He}}(\vec{e},e^{\prime })$ Process and the Neutron Magnetic Form Factor
• Neutron charge form factor at large $q^2$
• New empirical fits to the proton electromagnetic form factors
• Inclusive Electron-Nucleus Scattering at Large Momentum Transfer
• PWIA Extraction of the Neutron Magnetic Form Factor from Quasi-Elastic 3He(e,e') at Q^2 = 0.3 to 0.6 (GeV/c)^2
• x- and xi-scaling of the Nuclear Structure Function at Large x
• Neutron structure function and inclusive DIS from H-3 and He-3 at large Bjorken-x
• Precision Measurement of the Spin-dependent Asymmetry in the Threshold Region of ${}^3\overrightarrow{\mathrm{He}}(\vec{e},e^{\prime })$
• Description of inclusive scattering of few_GeV electrons from finite A nuclei and nuclear matter
• GRS computation of deep inelastic electron scattering on 4He
• Extraction of the n structure function $F_2^n$ from inclusive scattering data on composite nuclei
• Theoretical aspects of the CEBAF 89-009 experiment on inclusive scattering of 4.05 GeV electrons from nuclei
• Relativistic approaches to structure functions of nuclei
• A quark-cluster description of the EMC effect (Seminar given in the 18th Course of the "International School on Nuclear Physics", 16-23/9/'94, Erice, IT. To be published in Progress in Particle and Nuclear Physics, Vol. 34, Pergamon Press)
• R-ratios and moments of nuclear structure functions
• Description of inclusive scattering of 4.045 GeV electrons from D
• Theoretical predictions for extraction of GEn from semi-inclusive electron scattering on polarized 3He based on various nucleon-nucleon interactions

Cited by in corpus (5)

• Nucleon electromagnetic form factors
• Precise determination of low-Q nucleon electromagnetic form factors and their impact on parity-violating e-p elastic scattering
• A simple qualitative description of EMC ratios μ^A for 0.2 <~ x <~ 1.5 and some sample calculations
• Inclusive scattering data on light nuclei as a precision tool for the extraction of G_M^n
• Tortuous ways to the extraction of neutron observables from inclusive lepton scattering