A photon conversion finder at BESⅢ

XU Zhi-Rui; HE Kang-Lin

doi:10.1088/1674-1137/36/8/010

Chinese Physics C> 2012, Vol. 36> Issue(8) : 742-749 DOI: 10.1088/1674-1137/36/8/010

A photon conversion finder at BESⅢ

XU Zhi-Rui ,
HE Kang-Lin

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Abstract：
A photon conversion finder (PCF) based on track information from the main drift chamber (MDC) of the Beijing Spectrometer (BES0) at the Beijing Electron Positron Collider (BEPC/) is developed. The validation of the PCF is done by reconstructing π⁰ and measuring the branching fraction of J/ψ →γη'. Using the developed PCF tool, we mapped the materials from the interaction point through the BEPCII beam pipe up to the inner wall of the MDC.

References

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Perkins D H. Introduction to High Energy Physics. Forth Edition. Cambridge: Cambridge University Press, 2000[2] BESⅢ Collaboration. The preliminary Design Report of the BESⅢ Detector. Report No. IHEP-BEPCII-SB-13[3] Ablikim M et al. Nuclear Instruments and Methods in Physics Research A, 2010, 614: 345-399[4] HUANG Bin. Study of BESⅢ Offline Calibration and Particle Identification (Ph.D. Thesis). Beijing: Institute of High Energy Physics, CAS, 2009 (in Chinese)[5] Dunwoodie B, Hast C, Lees J-P et al. Study of Material Interactions with Gamma Conversions and Protons. BABAR Analysis Document #106, Version 2[6] Lurie Z. Evaluation of the Photon Conversion Finder for the BABAR Experiment (M.S. Thesis). Vancouver, British Columbia: The University of British Columbia, February 2002[7] Dahms T. Measurement of Photons via Conversion Pairs with the PHENIX Experiment at RHIC (M.S. Thesis). Stony Brook, New York: Stony Brook University, May 2005[8] Nakamura K et al. (Particle Data Group). J. Phys. G, 2010, 37: 075021[9] WANG D Y et al. Nuclear Electronics and Detection Technology, 2007, 27: 658-664[10] DENG Z Y et al. HEP NP, 2006, 30: 371 (in Chinese)[11] Jadach S, Ward B F L, Was Z. Comput. Phys. Commun., 2000, 130:260; Phys. Rev. D, 2001, 63: 113009[12] PING R G et al. Chinese Phys. C (HEP NP), 2009, 32: 599[13] CHEN J C, HUANG G S, QI X R et al. Phys. Rev. D, 2000, 62: 034003

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XU Zhi-Rui and HE Kang-Lin. A photon conversion finder at BESⅢ[J]. Chinese Physics C, 2012, 36(8): 742-749. doi: 10.1088/1674-1137/36/8/010

XU Zhi-Rui and HE Kang-Lin. A photon conversion finder at BESⅢ[J]. Chinese Physics C, 2012, 36(8): 742-749. doi: 10.1088/1674-1137/36/8/010 shu

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Received: 2011-11-01
Revised: 2011-12-12

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沈阳化工大学材料科学与工程学院沈阳 110142

A photon conversion finder at BESⅢ

XU Zhi-Rui
HE Kang-Lin

Received Date: 2011-11-01
Accepted Date: 2011-12-12
Available Online: 2012-08-05

Abstract: A photon conversion finder (PCF) based on track information from the main drift chamber (MDC) of the Beijing Spectrometer (BES0) at the Beijing Electron Positron Collider (BEPC/) is developed. The validation of the PCF is done by reconstructing π⁰ and measuring the branching fraction of J/ψ →γη'. Using the developed PCF tool, we mapped the materials from the interaction point through the BEPCII beam pipe up to the inner wall of the MDC.