dorsal/arxiv
View SchemaIn-Medium Properties of Hadrons - Observables II
| Authors | L. Alvarez-Ruso, T. Falter, U. Mosel, P. Muehlich |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0412084 |
| URL | https://arxiv.org/abs/nucl-th/0412084 |
| DOI | 10.1016/j.ppnp.2005.01.005 |
| Journal | Prog.Part.Nucl.Phys. 55 (2005) 71-90 |
Abstract
In this review we discuss the observable consequences of in-medium changes of hadronic properties in reactions with elementary probes, and in particular photons, on nuclei. After an outline of the theoretical method used we focus on a discussion of actual observables in photonuclear reactions; we discuss in detail $2\pi$- and vector-meson production. We show that the $2\pi^0$ photoproduction data can be well described by final state interactions of the pions produced whereas the semi-charged $\pi^0\pi^\pm$ channel exhibits a major discrepancy with theory. For $\omega$ production on nuclei in the TAPS/CB@ELSA experiment we analyse the $\pi^0\gamma$ decay channel, and illustrate the strength of the method by simulating experimental acceptance problems. Completely free of final state interactions is dilepton production in the few GeV range. We show that the sensitivity of this decay channel to changes of hadronic properties in medium in photonuclear reactions on nuclei is as large as in ultrarelativistic heavy ion collisions and make predictions for the on-going G7 experiment at JLAB. Finally we discuss that hadron production in nuclei at 10 -- 20 GeV photon energies can give important information on the hadronization process, and in particular on the time-scales involved. We show here detailed calculations for the low-energy (12 GeV) run at HERMES and predictions for planned experiments at JLAB.
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"abstract": "In this review we discuss the observable consequences of in-medium changes of\nhadronic properties in reactions with elementary probes, and in particular\nphotons, on nuclei. After an outline of the theoretical method used we focus on\na discussion of actual observables in photonuclear reactions; we discuss in\ndetail $2\\pi$- and vector-meson production. We show that the $2\\pi^0$\nphotoproduction data can be well described by final state interactions of the\npions produced whereas the semi-charged $\\pi^0\\pi^\\pm$ channel exhibits a major\ndiscrepancy with theory. For $\\omega$ production on nuclei in the TAPS/CB@ELSA\nexperiment we analyse the $\\pi^0\\gamma$ decay channel, and illustrate the\nstrength of the method by simulating experimental acceptance problems.\nCompletely free of final state interactions is dilepton production in the few\nGeV range. We show that the sensitivity of this decay channel to changes of\nhadronic properties in medium in photonuclear reactions on nuclei is as large\nas in ultrarelativistic heavy ion collisions and make predictions for the\non-going G7 experiment at JLAB. Finally we discuss that hadron production in\nnuclei at 10 -- 20 GeV photon energies can give important information on the\nhadronization process, and in particular on the time-scales involved. We show\nhere detailed calculations for the low-energy (12 GeV) run at HERMES and\npredictions for planned experiments at JLAB.",
"arxiv_id": "nucl-th/0412084",
"authors": [
"L. Alvarez-Ruso",
"T. Falter",
"U. Mosel",
"P. Muehlich"
],
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"hep-ph"
],
"doi": "10.1016/j.ppnp.2005.01.005",
"journal_ref": "Prog.Part.Nucl.Phys. 55 (2005) 71-90",
"title": "In-Medium Properties of Hadrons - Observables II",
"url": "https://arxiv.org/abs/nucl-th/0412084"
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