Chinese Physics C > 2008, Vol. 32 > Issue(3): 201-204 DOI: 10.1088/1674-1137/32/3/008

Applying Bayesian neural networks to identify pion, kaon and proton in BESⅡ

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The Monte-Carlo samples of pion, kaon and proton generated from 0.3GeV/cto 1.2GeV/cby the `tester' generator from SIMBES which are used to simulate the detector of BESⅡ are identified with the Bayesian neural networks (BNN). The pion identification and misidentification efficiencies are obviously better at high momentum region using BNN than the methods of χ²analysis of dE/dXand TOF information. The kaon identification and misidentification efficiencies are obviously better from 0.3GeV/cto 1.2GeV/cusing BNN than the methods of χ²analysis. The proton identification and misidentification efficiencies using BNN are basically consistent with the ones of χ²analysis. The anti-proton identification and misidentification efficiencies are better below 0.6GeV/cusing BNN than the methods of χ²analysis.

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XU Ye, HOU Jian and ZHU Kai-En. Applying Bayesian neural networks to identify pion, kaon and proton in BESⅡ[J]. Chinese Physics C, 2008, 32(3): 201-204. doi: 10.1088/1674-1137/32/3/008

XU Ye, HOU Jian and ZHU Kai-En. Applying Bayesian neural networks to identify pion, kaon and proton in BESⅡ[J]. Chinese Physics C, 2008, 32(3): 201-204. doi:10.1088/1674-1137/32/3/008 shu

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Received: 2007-05-28
Revised: 2007-06-14

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通讯作者:陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Applying Bayesian neural networks to identify pion, kaon and proton in BESⅡ

Corresponding author:XU Ye,

Received Date:2007-05-28

Accepted Date:2007-06-14

Available Online:2008-03-05

Abstract:

The Monte-Carlo samples of pion, kaon and proton generated from 0.3GeV/cto 1.2GeV/cby the `tester' generator from SIMBES which are used to simulate the detector of BESⅡ are identified with the Bayesian neural networks (BNN). The pion identification and misidentification efficiencies are obviously better at high momentum region using BNN than the methods of χ²analysis of dE/dXand TOF information. The kaon identification and misidentification efficiencies are obviously better from 0.3GeV/cto 1.2GeV/cusing BNN than the methods of χ²analysis. The proton identification and misidentification efficiencies using BNN are basically consistent with the ones of χ²analysis. The anti-proton identification and misidentification efficiencies are better below 0.6GeV/cusing BNN than the methods of χ²analysis.

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Applying Bayesian neural networks to identify pion, kaon and proton in BESⅡ

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通讯作者:陈斌, bchen63@163.com

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