dorsal/arxiv
View SchemaTwo-particle interferometry for non-central heavy-ion collisions
| Authors | Urs Achim Wiedemann |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9707046 |
| URL | https://arxiv.org/abs/nucl-th/9707046 |
| DOI | 10.1103/PhysRevC.57.266 |
| Journal | Phys.Rev.C57:266-279,1998 |
Abstract
In non-central heavy ion collisions, identical two particle Hanbury-Brown/Twiss (HBT) correlations C(K,q) depend on the azimuthal direction of the pair momentum K. We investigate the consequences for a harmonic analysis of the corresponding HBT radius parameters. Our discussion includes both, a model- independent analysis of these parameters in the Gaussian approximation, and the study of a class of hydrodynamical models which mimic essential geometrical and dynamical properties of peripheral heavy ion collisions. Also, we discuss the additional geometrical and dynamical information contained in the harmonic coefficients of these HBT radius parameters. The leading contribution of their first and second harmonics are found to satisfy simple constraints. This allows for a minimal, azimuthally sensitive parametrization of all first and second harmonic coefficients in terms of only two additional fit parameters. We determine to what extent these parameters can be extracted from experimental data despite finite multiplicity fluctuations and the resulting uncertainty in the reconstruction of the reaction plane.
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"abstract": "In non-central heavy ion collisions, identical two particle\nHanbury-Brown/Twiss (HBT) correlations C(K,q) depend on the azimuthal direction\nof the pair momentum K. We investigate the consequences for a harmonic analysis\nof the corresponding HBT radius parameters. Our discussion includes both, a\nmodel- independent analysis of these parameters in the Gaussian approximation,\nand the study of a class of hydrodynamical models which mimic essential\ngeometrical and dynamical properties of peripheral heavy ion collisions. Also,\nwe discuss the additional geometrical and dynamical information contained in\nthe harmonic coefficients of these HBT radius parameters. The leading\ncontribution of their first and second harmonics are found to satisfy simple\nconstraints. This allows for a minimal, azimuthally sensitive parametrization\nof all first and second harmonic coefficients in terms of only two additional\nfit parameters. We determine to what extent these parameters can be extracted\nfrom experimental data despite finite multiplicity fluctuations and the\nresulting uncertainty in the reconstruction of the reaction plane.",
"arxiv_id": "nucl-th/9707046",
"authors": [
"Urs Achim Wiedemann"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.57.266",
"journal_ref": "Phys.Rev.C57:266-279,1998",
"title": "Two-particle interferometry for non-central heavy-ion collisions",
"url": "https://arxiv.org/abs/nucl-th/9707046"
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