An event mixing technique for Bose-Einstein correlations of two pions in photoproduction around 1 GeV

  • We have developed an event mixing technique to observe Bose-Einstein correlations (BEC) between two identical neutral pions produced in photo-induced reactions in the non-perturbative QCD energy region. It is found that the missing-mass consistency cut and the pion-energy cut are essential for the event mixing method to effectively extract BEC observables. A Monte Carlo (MC) simulation is used to validate these constraints and confirms the efficiency of this method. Our work paves the way for similar BEC studies at lower energies where the multiplicity of emitted bosons is limited.
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Qing-Hua He, H. Fujimurala, H. Fukasawa, R. Hashimoto, Y. Honda, T. Ishikawa and T. Iwata. An event mixing technique for Bose-Einstein correlations of two pions in photoproduction around 1 GeV[J]. Chinese Physics C, 2016, 40(11): 114002. doi: 10.1088/1674-1137/40/11/114002
Qing-Hua He, H. Fujimurala, H. Fukasawa, R. Hashimoto, Y. Honda, T. Ishikawa and T. Iwata. An event mixing technique for Bose-Einstein correlations of two pions in photoproduction around 1 GeV[J]. Chinese Physics C, 2016, 40(11): 114002.  doi: 10.1088/1674-1137/40/11/114002 shu
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Received: 2016-02-02
Revised: 2016-07-02
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    Supported by Ministry of Education and Science of Japan (19002003) and JSPS KAKENHI (24244022, 26400287)

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An event mixing technique for Bose-Einstein correlations of two pions in photoproduction around 1 GeV

    Corresponding author: Qing-Hua He,
  • 1. Research Center for Electron Photon Science, Tohoku University, Sendai 982-0826, Japan
  • 2. Institute of Fluid Physics, China Academy of Engineering Physics, P. O. Box 919-101, Mianyang 621900, China
  • 3.  Research Center for Electron Photon Science, Tohoku University, Sendai 982-0826, Japan
  • 4.  Department of Physics, Yamagata University, Yamagata 990-8560, Japan
Fund Project:  Supported by Ministry of Education and Science of Japan (19002003) and JSPS KAKENHI (24244022, 26400287)

Abstract: We have developed an event mixing technique to observe Bose-Einstein correlations (BEC) between two identical neutral pions produced in photo-induced reactions in the non-perturbative QCD energy region. It is found that the missing-mass consistency cut and the pion-energy cut are essential for the event mixing method to effectively extract BEC observables. A Monte Carlo (MC) simulation is used to validate these constraints and confirms the efficiency of this method. Our work paves the way for similar BEC studies at lower energies where the multiplicity of emitted bosons is limited.

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