dorsal/arxiv
View SchemaInterplay of Interference Effects in Production of $J/\Psi$ and $\Psi'$ off Nuclei
| Authors | Joerg Huefner, Boris Kopeliovich |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9606010 |
| URL | https://arxiv.org/abs/nucl-th/9606010 |
Abstract
Our main observations are: (i) The effective path length of the $c\bar c$ wave packet, which is produced in the nucleus, grows with the energy of the produced charmonium. The variation is controlled by the coherence length $l_c=2E_{\Psi}/M^2_{\Psi}$. (ii) A colorless $c\bar c$ wave packet produced in $pp$-interaction is a specific linear combination of the $J/\Psi$ and $\Psi'$ states, and interacts substantially weaker that any of its components. The time evolution of this wave packet is controlled by the formation length, $l_f=2E_{\Psi}/(M^2_{\Psi'} - M^2_{\Psi})$. Exact formulas incorporating with these effects are derived. The interplay of the two phenomena results in a nontrivial energy- and $x_F$-dependence of the nuclear suppression of the charmonium production in proton-nucleus and nucleus-nucleus collisions and explains some of the experimentally observed effects.
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"abstract": "Our main observations are: (i) The effective path length of the $c\\bar c$\nwave packet, which is produced in the nucleus, grows with the energy of the\nproduced charmonium. The variation is controlled by the coherence length\n$l_c=2E_{\\Psi}/M^2_{\\Psi}$. (ii) A colorless $c\\bar c$ wave packet produced in\n$pp$-interaction is a specific linear combination of the $J/\\Psi$ and $\\Psi\u0027$\nstates, and interacts substantially weaker that any of its components. The time\nevolution of this wave packet is controlled by the formation length,\n$l_f=2E_{\\Psi}/(M^2_{\\Psi\u0027} - M^2_{\\Psi})$. Exact formulas incorporating with\nthese effects are derived. The interplay of the two phenomena results in a\nnontrivial energy- and $x_F$-dependence of the nuclear suppression of the\ncharmonium production in proton-nucleus and nucleus-nucleus collisions and\nexplains some of the experimentally observed effects.",
"arxiv_id": "nucl-th/9606010",
"authors": [
"Joerg Huefner",
"Boris Kopeliovich"
],
"categories": [
"nucl-th",
"hep-ph"
],
"title": "Interplay of Interference Effects in Production of $J/\\Psi$ and $\\Psi\u0027$ off Nuclei",
"url": "https://arxiv.org/abs/nucl-th/9606010"
},
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"variant": "snapshot-2026-03-01",
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