dorsal/arxiv
View SchemaBose-Einstein Correlations of Pion Wavepackets
| Authors | H. Merlitz, D. Pelte |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9702005 |
| URL | https://arxiv.org/abs/nucl-th/9702005 |
| DOI | 10.1007/s002180050232 |
| Journal | Z.Phys. A357 (1997) 175-188 |
Abstract
A wavepacket model for a system of free pions, which takes into account the full permutation symmetry of the wavefunction and which is suitable for any phase space parametrization is developed. The properties of the resulting mixed ensembles and the two-particle correlation function are discussed. A physical interpretation of the chaoticity lambda as localizat of the pions in the source is presented. Two techniques to generate test-particles, which satisfy the probability densities of the wavepacket state, are studied: 1. A Monte Carlo procedure in momentum space based on the standard Metropolis technique. 2. A molecular dynamic procedure using Bohm's quantum theory of motion. In order to reduce the numerical complexity, the separation of the wavefunction into momentum space clusters is discussed. In this context th influence of an unauthorized factorization of the state, i. e. the omissio of interference terms, is investigated. It is shown that the correlation radius remains almost uneffected, but the chaoticity parameter decreases substantially. A similar effect is observed in systems with high multiplic where the omission of higher order corrections in the analysis of two-part correlations causes a reduction of the chaoticity and the radius. The approximative treatment of the Coulomb interaction between pions and source is investigated. The results suggest that Coulomb effects on the co radii are not symmetric for pion pairs of different charges. For negative the radius, integrated over the whole momentum spectrum, increases substan while for positive pions the radius remains almost unchanged.
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"abstract": "A wavepacket model for a system of free pions, which takes into account the\nfull permutation symmetry of the wavefunction and which is suitable for any\nphase space parametrization is developed. The properties of the resulting mixed\nensembles and the two-particle correlation function are discussed. A physical\ninterpretation of the chaoticity lambda as localizat of the pions in the source\nis presented.\n Two techniques to generate test-particles, which satisfy the probability\ndensities of the wavepacket state, are studied:\n 1. A Monte Carlo procedure in momentum space based on the standard Metropolis\ntechnique.\n 2. A molecular dynamic procedure using Bohm\u0027s quantum theory of motion.\n In order to reduce the numerical complexity, the separation of the\nwavefunction into momentum space clusters is discussed. In this context th\ninfluence of an unauthorized factorization of the state, i. e. the omissio of\ninterference terms, is investigated. It is shown that the correlation radius\nremains almost uneffected, but the chaoticity parameter decreases\nsubstantially. A similar effect is observed in systems with high multiplic\nwhere the omission of higher order corrections in the analysis of two-part\ncorrelations causes a reduction of the chaoticity and the radius.\n The approximative treatment of the Coulomb interaction between pions and\nsource is investigated. The results suggest that Coulomb effects on the co\nradii are not symmetric for pion pairs of different charges. For negative the\nradius, integrated over the whole momentum spectrum, increases substan while\nfor positive pions the radius remains almost unchanged.",
"arxiv_id": "nucl-th/9702005",
"authors": [
"H. Merlitz",
"D. Pelte"
],
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"doi": "10.1007/s002180050232",
"journal_ref": "Z.Phys. A357 (1997) 175-188",
"title": "Bose-Einstein Correlations of Pion Wavepackets",
"url": "https://arxiv.org/abs/nucl-th/9702005"
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