dorsal/arxiv
View SchemaRoper excitation in $\vec{p}+\alpha \to \vec{p}+\alpha+X$ reactions
| Authors | S. Hirenzaki, A. D. Bacher, S. E. Vigdor |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9812054 |
| URL | https://arxiv.org/abs/nucl-th/9812054 |
| DOI | 10.1103/PhysRevC.59.1735 |
| Journal | Phys.Rev. C59 (1999) 1735-1742 |
Abstract
We calculate differential cross sections and the spin transfer coefficient $D_{nn}$ in the $\vec{p}+\alpha \to \vec{p}+\alpha+\pi^0$ reaction for proton bombarding energies from 1 to 10 GeV and $\pi^0 - p$ invariant masses spanning the region of the N$^*$(1440) Roper resonance. Two processes -- $\Delta$ excitation in the $\alpha$-particle and Roper excitation in the proton -- are included in an effective reaction model which was shown previously to reproduce existing inclusive spectra. The present calculations demonstrate that these two contributions can be clearly distinguished via $D_{nn}$, even under kinematic conditions where cross sections alone exhibit no clear peak structure due to the excitation of the Roper.
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"abstract": "We calculate differential cross sections and the spin transfer coefficient\n$D_{nn}$ in the $\\vec{p}+\\alpha \\to \\vec{p}+\\alpha+\\pi^0$ reaction for proton\nbombarding energies from 1 to 10 GeV and $\\pi^0 - p$ invariant masses spanning\nthe region of the N$^*$(1440) Roper resonance. Two processes -- $\\Delta$\nexcitation in the $\\alpha$-particle and Roper excitation in the proton -- are\nincluded in an effective reaction model which was shown previously to reproduce\nexisting inclusive spectra. The present calculations demonstrate that these two\ncontributions can be clearly distinguished via $D_{nn}$, even under kinematic\nconditions where cross sections alone exhibit no clear peak structure due to\nthe excitation of the Roper.",
"arxiv_id": "nucl-th/9812054",
"authors": [
"S. Hirenzaki",
"A. D. Bacher",
"S. E. Vigdor"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.59.1735",
"journal_ref": "Phys.Rev. C59 (1999) 1735-1742",
"title": "Roper excitation in $\\vec{p}+\\alpha \\to \\vec{p}+\\alpha+X$ reactions",
"url": "https://arxiv.org/abs/nucl-th/9812054"
},
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