dorsal/arxiv
View SchemaThe longitudinal asymmetry of the $(e,e'p)$ missing momentum distribution as a signal of color transparency
| Authors | O. Benhar, S. Fantoni, N. N. Nikolaev, J. Speth, A. A. Usmani, B. G. Zakharov |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9505023 |
| URL | https://arxiv.org/abs/nucl-th/9505023 |
| DOI | 10.1016/0370-2693(95)01025-L |
| Journal | Phys.Lett. B358 (1995) 191-196 |
Abstract
We use multiple scattering theory to evaluate the $Q^{2}$ dependence of the forward-backward asymmetry, $A_{z}$, of the missing momentum distribution in quasielstic $A(e,e'p)$ scattering, which is expected to be affected by color transparency. The novel features of our analysis are a consistent treatment of the structure of the ejectile state formed after absorption of the virtual photon by the struck proton and a careful evaluation of the background asymmetry induced by the nonvanishing real part of the proton-nucleon scattering amplitude. We find that the absolute magnitude of $A_{z}$ is dominated by this background at the $Q^{2}$'s attainable at the Continuous Electron Beam Accelerator Facility. However, the $Q^{2}$ dependence of the asymmetry is sensitive to the onset of color transparency, whose observation in high statistics experiments appears to be feasible, particularly using light targets such as $^{12}C$ or $^{16}O$.
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"abstract": "We use multiple scattering theory to evaluate the $Q^{2}$ dependence\n of the forward-backward asymmetry, $A_{z}$, of the missing momentum\ndistribution in quasielstic $A(e,e\u0027p)$ scattering, which is expected to be\naffected by color transparency. The novel features of our analysis are a\nconsistent treatment of the structure of the ejectile state formed after\nabsorption of the virtual photon by the struck proton and a careful evaluation\nof the background asymmetry induced by the nonvanishing real part of the\nproton-nucleon scattering amplitude. We find that the absolute magnitude of\n$A_{z}$ is dominated by this background at the $Q^{2}$\u0027s attainable at the\nContinuous Electron Beam Accelerator Facility. However, the $Q^{2}$ dependence\nof the asymmetry is sensitive to the onset of color transparency, whose\nobservation in high statistics experiments appears to be feasible, particularly\nusing light targets such as $^{12}C$ or $^{16}O$.",
"arxiv_id": "nucl-th/9505023",
"authors": [
"O. Benhar",
"S. Fantoni",
"N. N. Nikolaev",
"J. Speth",
"A. A. Usmani",
"B. G. Zakharov"
],
"categories": [
"nucl-th"
],
"doi": "10.1016/0370-2693(95)01025-L",
"journal_ref": "Phys.Lett. B358 (1995) 191-196",
"title": "The longitudinal asymmetry of the $(e,e\u0027p)$ missing momentum distribution as a signal of color transparency",
"url": "https://arxiv.org/abs/nucl-th/9505023"
},
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