dorsal/arxiv
View SchemaEffects of HBT correlations on flow measurements
| Authors | Mai Dinh, Nicolas Borghini, Jean-Yves Ollitrault |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9912013 |
| URL | https://arxiv.org/abs/nucl-th/9912013 |
| DOI | 10.1016/S0370-2693(00)00181-7 |
| Journal | Phys.Lett. B477 (2000) 51-58 |
Abstract
The methods currently used to measure collective flow in nucleus--nucleus collisions assume that the only azimuthal correlations between particles are those arising from their correlation with the reaction plane. However, quantum HBT correlations also produce short range azimuthal correlations between identical particles. This creates apparent azimuthal anisotropies of a few percent when pions are used to estimate the direction of the reaction plane. These should not be misinterpreted as originating from collective flow. In particular, we show that the peculiar behaviour of the directed and elliptic flow of pions observed by NA49 at low p_T can be entirely understood in terms of HBT correlations. Such correlations also produce apparent higher Fourier harmonics (of order n larger than 3) of the azimuthal distribution, with magnitudes of the order of 1%, which should be looked for in the data.
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"abstract": "The methods currently used to measure collective flow in nucleus--nucleus\ncollisions assume that the only azimuthal correlations between particles are\nthose arising from their correlation with the reaction plane. However, quantum\nHBT correlations also produce short range azimuthal correlations between\nidentical particles. This creates apparent azimuthal anisotropies of a few\npercent when pions are used to estimate the direction of the reaction plane.\nThese should not be misinterpreted as originating from collective flow. In\nparticular, we show that the peculiar behaviour of the directed and elliptic\nflow of pions observed by NA49 at low p_T can be entirely understood in terms\nof HBT correlations. Such correlations also produce apparent higher Fourier\nharmonics (of order n larger than 3) of the azimuthal distribution, with\nmagnitudes of the order of 1%, which should be looked for in the data.",
"arxiv_id": "nucl-th/9912013",
"authors": [
"Mai Dinh",
"Nicolas Borghini",
"Jean-Yves Ollitrault"
],
"categories": [
"nucl-th"
],
"doi": "10.1016/S0370-2693(00)00181-7",
"journal_ref": "Phys.Lett. B477 (2000) 51-58",
"title": "Effects of HBT correlations on flow measurements",
"url": "https://arxiv.org/abs/nucl-th/9912013"
},
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