dorsal/arxiv
View SchemaTesting the Resolving Power of 2-D K^+ K^+ Interferometry
| Authors | Sandra S. Padula, Cristiane G. Roldao |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9801036 |
| URL | https://arxiv.org/abs/nucl-th/9801036 |
| DOI | 10.1103/PhysRevC.58.2907 |
| Journal | Phys.Rev.C58:2907-2913,1998 |
Abstract
Adopting a procedure previously proposed to quantitatively study two-dimensional pion interferometry, an equivalent 2-D chi^2 analysis was performed to test the resolving power of that method when applied to less favorable conditions, i.e., if no significant contribution from long lived resonances is expected, as in kaon interferometry. For that purpose, use is made of the preliminary E859 K^+ K^+ interferometry data from Si+Au collisions at 14.6 AGeV/c. As expected, less sensitivity is achieved in the present case, although it still is possible to distinguish two distinct decoupling geometries. The present analysis seems to favor scenarios with no resonance formation at the AGS energy range, if the preliminary K^+ K^+ data are confirmed. The possible compatibility of data with zero decoupling proper time interval, conjectured by the 3-D experimental analysis, is also investigated and is ruled out when considering more realistic dynamical models with expanding sources. These results, however, clearly evidence the important influence of the time emission interval on the source effective transverse dimensions. Furthermore, they strongly emphasize that the static Gaussian parameterization, commonly used to fit data, cannot be trusted under more realistic conditions, leading to distorted or even wrong interpretation of the source parameters!
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"abstract": "Adopting a procedure previously proposed to quantitatively study\ntwo-dimensional pion interferometry, an equivalent 2-D chi^2 analysis was\nperformed to test the resolving power of that method when applied to less\nfavorable conditions, i.e., if no significant contribution from long lived\nresonances is expected, as in kaon interferometry. For that purpose, use is\nmade of the preliminary E859 K^+ K^+ interferometry data from Si+Au collisions\nat 14.6 AGeV/c. As expected, less sensitivity is achieved in the present case,\nalthough it still is possible to distinguish two distinct decoupling\ngeometries. The present analysis seems to favor scenarios with no resonance\nformation at the AGS energy range, if the preliminary K^+ K^+ data are\nconfirmed. The possible compatibility of data with zero decoupling proper time\ninterval, conjectured by the 3-D experimental analysis, is also investigated\nand is ruled out when considering more realistic dynamical models with\nexpanding sources. These results, however, clearly evidence the important\ninfluence of the time emission interval on the source effective transverse\ndimensions. Furthermore, they strongly emphasize that the static Gaussian\nparameterization, commonly used to fit data, cannot be trusted under more\nrealistic conditions, leading to distorted or even wrong interpretation of the\nsource parameters!",
"arxiv_id": "nucl-th/9801036",
"authors": [
"Sandra S. Padula",
"Cristiane G. Roldao"
],
"categories": [
"nucl-th",
"hep-ph"
],
"doi": "10.1103/PhysRevC.58.2907",
"journal_ref": "Phys.Rev.C58:2907-2913,1998",
"title": "Testing the Resolving Power of 2-D K^+ K^+ Interferometry",
"url": "https://arxiv.org/abs/nucl-th/9801036"
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