The E12-14-012 experiment, performed in Jefferson Lab Hall A, has collected exclusive electron-scattering data (e,e'p) in parallel kinematics using natural argon and natural titanium targets. In this ...study we report the first results of the analysis of the data set corresponding to beam energy 2222 GeV, electron scattering angle 21.5° , and proton emission angle –50° . The differential cross sections, measured with ≈4% uncertainty, have been studied as a function of missing energy and missing momentum, and compared to the results of Monte Carlo simulations, obtained from a model based on the distorted-wave impulse approximation.
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We discuss the implementation of the nuclear model based on realistic nuclear spectral functions in the GENIE neutrino interaction generator. Besides improving on the Fermi gas description of the ...nuclear ground state, our scheme involves a new prescription for Q super(2) selection, meant to efficiently enforce energy-momentum conservation. The results of our simulations, validated through comparison to electron scattering data, have been obtained for a variety of target nuclei, ranging from carbon to argon, and cover the kinematical region in which quasielastic scattering is the dominant reaction mechanism. We also analyze the influence of the adopted nuclear model on the determination of neutrino oscillation parameters.
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The success of the ambitious programs of both long- and short-baseline neutrino-oscillation experiments employing liquid-argon time-projection chambers will greatly rely on the precision with which ...the weak response of the argon nucleus can be estimated. In the E12-14-012 experiment at Jefferson Lab Hall A, we studied the properties of the argon nucleus by scattering a high-quality electron beam off a high-pressure gaseous argon target. Here, we present the measured Ar-40(e, e') double differential cross section at incident electron energy E = 2.222 GeV and scattering angle theta = 15.54 degrees. The data cover a broad range of energy transfers, where quasielastic scattering and delta production are the dominant reaction mechanisms. The result for argon is compared to our previously reported cross sections for titanium and carbon, obtained in the same kinematical setup.
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The success of the ambitious programs of both long- and short-baseline neutrino-oscillation experiments employing liquid-argon time-projection chambers will greatly rely on the precision with which ...the weak response of the argon nucleus can be estimated. In the E12-14-012 experiment at Jefferson Lab Hall A, we studied the properties of the argon nucleus by scattering a high-quality electron beam off a high-pressure gaseous argon target. Here, we present the measured Ar-40(e, e') double differential cross section at incident electron energy E = 2.222 GeV and scattering angle theta = 15.54 degrees. The data cover a broad range of energy transfers, where quasielastic scattering and delta production are the dominant reaction mechanisms. The result for argon is compared to our previously reported cross sections for titanium and carbon, obtained in the same kinematical setup.
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From the mass number dependence of the nucleus-to-deuteron cross section ratios for deep inelastic lepton scattering we extract the dependence of the EMC effect upon nuclear density. The resulting ...almost linear density dependence at
x>0.4 is found to be in agreement with the one theoretically predicted from realistic spectral functions that account for binding and short-range correlation effects.
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IJS, IMTLJ, KILJ, KISLJ, NUK, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK
The
nth moments of the nuclear structure function
F
2
A
(
x,
Q
2) are analyzed using the off-shell kinematics appropriate to describe deep inelastic electron–nucleus scattering within the impulse ...approximation. It is shown that off-shell effects are sensitive to the form of both the nuclear spectral function and the nucleon structure function
F
2
N
(
x,
Q
2), and can be as large as ∼10% at
Q
2∼2 (GeV/
c)
2.
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IJS, IMTLJ, KILJ, KISLJ, NUK, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK
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