dorsal/arxiv
View SchemaMultiparticle Bose-Einstein Correlations
| Authors | Urs Achim Wiedemann |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9801009 |
| URL | https://arxiv.org/abs/nucl-th/9801009 |
| DOI | 10.1103/PhysRevC.57.3324 10.1103/PhysRevC.61.029902 |
| Journal | Phys.Rev.C57:3324-3339,1998; Erratum-ibid.C61:029902,2000 |
Abstract
Multiparticle symmetrization effects are contributions to the spectra of Bose-symmetrized states which are not the product of pairwise correlations. Usually they are neglected in particle interferometric calculations which aim at determining the geometry of the boson emitting source from the measured momentum distributions. Based on a method introduced by Zajc and Pratt, we give a calculation of all multiparticle symmetrization effects to the one- and two-particle momentum spectra for a Gaussian phase space distribution of emission points. Our starting point is an ensemble of N-particle Bose-symmetrized wavefunctions with specified phase space localization. In scenarios typical for relativistic heavy ion collisions, multiparticle effects steepen the slope of the one-particle spectrum for realistic particle phase space densities by up to 20 MeV, and they broaden the relative momentum dependence of the two-particle correlations. We discuss these modifications and their consequences in quantitative detail. Also, we explain how multiparticle effects modify the normalization of the two-particle correlator. The resulting normalization conserves event probabilities, which is not the case for the commonly used pair approximation. Finally, we propose a new method of calculating Bose-Einstein weights from the output of event generators, taking multiparticle correlations into account.
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"abstract": "Multiparticle symmetrization effects are contributions to the spectra of\nBose-symmetrized states which are not the product of pairwise correlations.\nUsually they are neglected in particle interferometric calculations which aim\nat determining the geometry of the boson emitting source from the measured\nmomentum distributions. Based on a method introduced by Zajc and Pratt, we give\na calculation of all multiparticle symmetrization effects to the one- and\ntwo-particle momentum spectra for a Gaussian phase space distribution of\nemission points. Our starting point is an ensemble of N-particle\nBose-symmetrized wavefunctions with specified phase space localization. In\nscenarios typical for relativistic heavy ion collisions, multiparticle effects\nsteepen the slope of the one-particle spectrum for realistic particle phase\nspace densities by up to 20 MeV, and they broaden the relative momentum\ndependence of the two-particle correlations. We discuss these modifications and\ntheir consequences in quantitative detail. Also, we explain how multiparticle\neffects modify the normalization of the two-particle correlator. The resulting\nnormalization conserves event probabilities, which is not the case for the\ncommonly used pair approximation. Finally, we propose a new method of\ncalculating Bose-Einstein weights from the output of event generators, taking\nmultiparticle correlations into account.",
"arxiv_id": "nucl-th/9801009",
"authors": [
"Urs Achim Wiedemann"
],
"categories": [
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"doi": "10.1103/PhysRevC.57.3324 10.1103/PhysRevC.61.029902",
"journal_ref": "Phys.Rev.C57:3324-3339,1998; Erratum-ibid.C61:029902,2000",
"title": "Multiparticle Bose-Einstein Correlations",
"url": "https://arxiv.org/abs/nucl-th/9801009"
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