Weight of dE/dx and TOF in Particle Identification

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QIN Hu, DONG Liao-Yuan, SHEN Xiao-Yan, JIN Shan and LUO Cheng-Lin. Weight of dE/dx and TOF in Particle Identification[J]. Chinese Physics C, 2004, 28(7): 738-743.
QIN Hu, DONG Liao-Yuan, SHEN Xiao-Yan, JIN Shan and LUO Cheng-Lin. Weight of dE/dx and TOF in Particle Identification[J]. Chinese Physics C, 2004, 28(7): 738-743. shu
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Received: 2003-09-28
Revised: 1900-01-01
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Weight of dE/dx and TOF in Particle Identification

    Corresponding author: QIN Hu,
  • School of Physical Science and Technology,Nanjing Normal University,Nanjing 210097,China2 Institute of High Energy Physics,CAS,Beijing 100039,China

Abstract: In the analysis of Beijing Spectrometer (BES) data, the dE/dx and TOF information have been used in the particle identification. When combining the dE/dx and TOF information to do the particle identification, the χ2 of dE/dx and TOF are usually added with equal weight. But the particle identification capability of dE/dx and TOF is different in different momentum region. In this paper, we give the weights of dE/dx and TOF in different momentum region and form a new variable which uses different weights for dE/dx and TOF informations to do the particle identification.

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