An energy sum constraint of event mixing for Bose-Einstein correlations in reactions with ππX final states around 1 GeV

  • We present a new event mixing technique for measuring two-pion Bose-Einstein correlations (BEC) in reactions with only two identical bosons among three final state particles. This new mixing method contains a missing mass consistency (MMC) cut and an energy sum order (ESO) cut. Unlike the previous proposed pion energy cut, which abandons nearly half the original events, the ESO cut does not eliminate any original events and hence improves the statistics of both original events and mixed events. Numerical tests using the γp→π0π0p events around 1 GeV are carried out to verify the validity of the ESO cut. This cut is able to reproduce the relative momentum distribution of the original events in the absence of BEC effects. In addition, its ability to observe BEC effects is tested by an event sample in the presence of BEC effects. Simulation results show the BEC effects can be observed clearly as an enhancement in the correlation function, and the BEC parameters extracted by this event mixing cut are consistent with the input BEC parameters.
      PCAS:
  • 加载中
  • [1] R. M. Weiner, Introduction to Bose-Einstein Correlations and Subatomic Interferometry, (Wiley, Chichester, 1999)
    [2] D. Boal, C. Gelbke, B. K. Jennings, Rev. Mod. Phys., 62: 553 (1990)
    [3] G. Alexander, Rep. Prog. Phys., 66: 481 (2003)
    [4] G. Goldhaber et al, Phys. Rev., 120: 300 (1960)
    [5] G. I. Kopylov and M. I. Podgoretsky, Sov. J. Nucl. Phys., 15:219 (1972)
    [6] G. I. Kopylov and M. I. Podgoretsky, Sov. Phys. JETP, 42:211 (1975)
    [7] P. Klaja et al, J. Phys. G, 37: 055003 (2010)
    [8] K. Aamodt et al, Phys. Rev. D, 84: 112004 (2011)
    [9] H. Aihara et al, Phys. Rev. D, 31: 996 (1985)
    [10] M. Althoff et al, Z. Phys. C, 30: 355 (1986)
    [11] S. K. Choi et al, Phys. Lett. D, 355: 406 (1995)
    [12] D. Decamp et al, Z. Phys. C, 54: 75 (1992)
    [13] P. Abreu et al, Phys. Lett. B, 286: 201 (1992)
    [14] H. J. Behrend et al, Phys. Lett. B, 245: 298 (1990)
    [15] V. A. Korotkov et al, Z. Phys. C, 60: 37 (1993)
    [16] M. Arneodo et al, Z. Phys. C, 32: 1 (1986)
    [17] M. Adamus et al, Z. Phys. C, 37: 347 (1988)
    [18] J. L. Bailly et al, Z. Phys. C, 43: 431 (1989)
    [19] C. Adloff et al, Z. Phys. C, 75: 437 (1997)
    [20] A. D. Chacon et al, Phys. Rev. C, 43: 2670 (1991)
    [21] U. Heinz and B. V. Jacak, Ann. Rev. Nucl. Part. Sci., 49: 529 (1999)
    [22] Y. G. Ma et al, Nucl. Phys. A, 790: 299c (2007)
    [23] B. Abelev et al, Phys. Rev. C, 74: 054902 (2006)
    [24] L. Adamczyk et al, Phys. Rev. Lett., 113: 142301 (2014)
    [25] K. Aamodt et al, Phys. Let. B, 696: 328 (2011)
    [26] W. Zhang et al, High Energy Phys. Nucl. Phys., 25: 237 (2001) (in Chinsese)
    [27] Y. Zhang, J. Yang, and W. N. Zhang, Chin. Phys. C, 39:034103 (2015)
    [28] Y. Y. Ren, M. J. Efaaf, and W. N. Zhang, Chin. Phys. C, 34:472 (2010)
    [29] L. Huo, W. N. Zhang, X. J. Chen, J. B. Zhang, and G. X. Tang, High Energy Phys. Nucl. Phys., 27: 53 (2003) (in Chinsese)
    [30] Z. Chajȩcki and M. Lisa, Phys. Rev. C, 78: 064903 (2008)
    [31] Q. He, Ph.D. Thesis, (Tohoku University, Japan, 2014)
    [32] Q. He et al, Chin. Phys. C, 40: 114002 (2016)
    [33] M. Wolf et al, Eur. Phys. J. A, 9: 5 (2000)
    [34] R. Brun and F. Rademakers, Nucl. Instr. Methods A, 389: 81 (1997)
    [35] F. James, Monte Carlo Phase Space, CERN-68-15 (1968)
    [36] L. Perrozzi, Phys. Part. Nucl. Lett., 8: 881 (2011)
  • 加载中

Get Citation
Qing-Hua He. An energy sum constraint of event mixing for Bose-Einstein correlations in reactions with ππX final states around 1 GeV[J]. Chinese Physics C, 2018, 42(7): 074004. doi: 10.1088/1674-1137/42/7/074004
Qing-Hua He. An energy sum constraint of event mixing for Bose-Einstein correlations in reactions with ππX final states around 1 GeV[J]. Chinese Physics C, 2018, 42(7): 074004.  doi: 10.1088/1674-1137/42/7/074004 shu
Milestone
Received: 2018-02-26
Revised: 2018-04-20
Fund

    Supported by Fundamental Research Funds for the Central Universities (1006-YAH17063, 1006-XAA18059)

Article Metric

Article Views(1311)
PDF Downloads(18)
Cited by(0)
Policy on re-use
To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.
通讯作者: 陈斌, bchen63@163.com
  • 1. 

    沈阳化工大学材料科学与工程学院 沈阳 110142

  1. 本站搜索
  2. 百度学术搜索
  3. 万方数据库搜索
  4. CNKI搜索

Email This Article

Title:
Email:

An energy sum constraint of event mixing for Bose-Einstein correlations in reactions with ππX final states around 1 GeV

  • 1. Department of Nuclear Science and Engineering, Nanjing University of Aeronautics and Astronautics, (NUAA), Nanjing 210016, China
Fund Project:  Supported by Fundamental Research Funds for the Central Universities (1006-YAH17063, 1006-XAA18059)

Abstract: We present a new event mixing technique for measuring two-pion Bose-Einstein correlations (BEC) in reactions with only two identical bosons among three final state particles. This new mixing method contains a missing mass consistency (MMC) cut and an energy sum order (ESO) cut. Unlike the previous proposed pion energy cut, which abandons nearly half the original events, the ESO cut does not eliminate any original events and hence improves the statistics of both original events and mixed events. Numerical tests using the γp→π0π0p events around 1 GeV are carried out to verify the validity of the ESO cut. This cut is able to reproduce the relative momentum distribution of the original events in the absence of BEC effects. In addition, its ability to observe BEC effects is tested by an event sample in the presence of BEC effects. Simulation results show the BEC effects can be observed clearly as an enhancement in the correlation function, and the BEC parameters extracted by this event mixing cut are consistent with the input BEC parameters.

    HTML

Reference (36)

目录

/

DownLoad:  Full-Size Img  PowerPoint
Return
Return