dorsal/arxiv
View SchemaReconstruction of electrons with the Gaussian-sum filter in the CMS tracker at LHC
| Authors | W. Adam, R. Frühwirth, A. Strandlie, T. Todorov |
|---|---|
| Categories | |
| ArXiv ID | physics/0306087 |
| URL | https://arxiv.org/abs/physics/0306087 |
| DOI | 10.1088/0954-3899/31/9/N01 |
| Journal | eConf C0303241 (2003) TULT009; J.Phys. G31 (2005) N9 |
Abstract
The bremsstrahlung energy loss distribution of electrons propagating in matter is highly non Gaussian. Because the Kalman filter relies solely on Gaussian probability density functions, it might not be an optimal reconstruction algorithm for electron tracks. A Gaussian-sum filter (GSF) algorithm for electron track reconstruction in the CMS tracker has therefore been developed. The basic idea is to model the bremsstrahlung energy loss distribution by a Gaussian mixture rather than a single Gaussian. It is shown that the GSF is able to improve the momentum resolution of electrons compared to the standard Kalman filter. The momentum resolution and the quality of the estimated error are studied with various types of mixture models of the energy loss distribution.
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"abstract": "The bremsstrahlung energy loss distribution of electrons propagating in\nmatter is highly non Gaussian. Because the Kalman filter relies solely on\nGaussian probability density functions, it might not be an optimal\nreconstruction algorithm for electron tracks. A Gaussian-sum filter (GSF)\nalgorithm for electron track reconstruction in the CMS tracker has therefore\nbeen developed. The basic idea is to model the bremsstrahlung energy loss\ndistribution by a Gaussian mixture rather than a single Gaussian. It is shown\nthat the GSF is able to improve the momentum resolution of electrons compared\nto the standard Kalman filter. The momentum resolution and the quality of the\nestimated error are studied with various types of mixture models of the energy\nloss distribution.",
"arxiv_id": "physics/0306087",
"authors": [
"W. Adam",
"R. Fr\u00fchwirth",
"A. Strandlie",
"T. Todorov"
],
"categories": [
"physics.data-an"
],
"doi": "10.1088/0954-3899/31/9/N01",
"journal_ref": "eConf C0303241 (2003) TULT009; J.Phys. G31 (2005) N9",
"title": "Reconstruction of electrons with the Gaussian-sum filter in the CMS tracker at LHC",
"url": "https://arxiv.org/abs/physics/0306087"
},
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