Weight of dE/dx and TOF in Particle Identification

QIN Hu; DONG Liao-Yuan; SHEN Xiao-Yan; JIN Shan; LUO Cheng-Lin

Chinese Physics C> 2004, Vol. 28> Issue(7) : 738-743

Weight of dE/dx and TOF in Particle Identification

School of Physical Science and Technology,Nanjing Normal University,Nanjing 210097,China2 Institute of High Energy Physics,CAS,Beijing 100039,China

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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.

References

[1]

. BAI J Z et al (BES Collaboration) . Nucl . Instrum. Methods , 2001 A458 :6272. PENG Hai-Ping et al. HEP NP , 2002 , 26 :1078 —1086 (in Chinese) (彭海平等,高能物理与核物理, 2002 , 26 :1078 —1086)3. PENG Hai-Ping et al . HEP NP , 2002 , 26 :861 —869 (in Chinese) (彭海平等,高能物理与核物理, 2002 , 26 :861 —869)4. Barate R et al (ALEPH Collaboratory) . Phys. Lett. , 2000 , B 487 :2535. Barate R et al (ACEPH Collaboratory) . Phys. Lett . , 2001 , B 499 :53

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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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沈阳化工大学材料科学与工程学院沈阳 110142

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

Received Date: 2003-09-28
Accepted Date: 1900-01-01
Available Online: 2004-07-05

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.