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Chinese Physics C> 2016, Vol. 40> Issue(11) : 113002 DOI: 10.1088/1674-1137/40/11/113002

Tuning and validation of hadronic event generator for R value measurements in the tau-charm region

  • 1.

      Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

  • 2.

      University of Science and Technology of China, Hefei 230026, China

  • 3.

      University of South China, Hengyang, 421001, China

  • To measure the R value in an energy scan experiment with e+e- collisions, precise calculation of initial state radiation is required in the event generators. We present an event generator for this consideration, which incorporates initial state radiation effects up to second order accuracy. The radiative correction factor is calculated using the totally hadronic Born cross section. The measured exclusive processes are generated according to their cross sections, while the unknown processes are generated using the LUND Area Law model, and its parameters are tuned with data collected at √s=3.65 GeV. The optimized values are validated with data in the range √s=2.2324-3.671 GeV. These optimized parameters are universally valid for event generation below the DD threshold.
      PCAS:
    • 13.66.Jn(Precision measurements in e?e+ interactions)
    • 02.70.Uu(Applications of Monte Carlo methods)

  • References

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    [4] V. P. Druzhinin et al, Rev. Mod. Phys., 83: 1545(2011); M. R. Whalley, J. Phys. G, 29: A1(2003)
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    [45] M. Ablikim et al, Nucl. Instrum. Methods A 614: 345(2010)
    [46] A. Buckley, H. Hoeth, H. Lacker et al, Eur. Phys. J. C, 65: 331(2010)
    [47] M. Althoff et al (TASSO Collaboration), Z. Phys. C, 26: 157(1984)
    [48] W. Braunschweig et al (TASSO Collaboration), Z. Phys. C, 41: 359(1988)
    [49] D. Buskulic et al (ALEPH Collaboration), Z. Phys. C, 55: 209(1992)
    [50] R. Barate et al (ALEPH Collaboration), Phys. Rep., 294: 1(1998)
    [51] K. Hamacher, M. Weierstall, hep-ex/9511011(1995)
    [52] P. Abreu et al (DELPHI Collaboration), Z. Phys. C, 73: 11(1996)
    [53] P. Abreu, W. Adam, and T. Adye et al, Z. Phys. C, 73: 11(1996)
    [54] F. James, CERN-D-506(1994); F. James and M. Roos, Comput. Phys. Commun., 10: 343(1975)
    [55] M. Ablikim et al, Phys. Lett. B, 677: 239(2009)
    [56] Z. Y. Deng et al, High Energy Physics and Nuclear Physics, 30: 371(2006) (in Chinese)
    [57] S. Jadach, B. F. L. Ward, and Z. Was, Phys. Rev. D, 63: 113009(2001); B. F. L. Ward, S. Jadach, and Z. Was, Nucl. Phys. B, Proc. Suppl. 116:73(2003)
    [58] Piotr Golonka and Zbigniew Was, Eur. Phys. J. C, 45: 97(2006)

  • References

    [1] B. Pietrzyk, Nucl. Phys. B (Pro. Suppl.), 162: 18(2006); F. Jegerlehner, Nucl. Phys. B (Pro. Suppl.), 162: 22(2006)[hep-ph/0608329]; F. Ambrosino et al, Eur. Phys. J. C, 50: 729(2007)[hep-ex/0603056]
    [2] J. Z. Bai et al(BES Collaboration), Phy. Rev. Lett.88: 101802(2002)[hep-ex/0102003]
    [3] H. Burkhardt and B. Pietrzyk, Phys. Lett., B513: 46(2001); F. Jegerlehner, J. Phys. G, 29: 101(2003)
    [4] V. P. Druzhinin et al, Rev. Mod. Phys., 83: 1545(2011); M. R. Whalley, J. Phys. G, 29: A1(2003)
    [5] R. G. Ping, Chin. Phys. C, 32: 599(2008)
    [6] Kuang-Ta Zhao and Yifang Wang, Int. J. Mod. Phys. A, 24: Supp. 1(2009); Bo Andersson and Haiming Hu, arXiv:hep-ph/9910285; Haiming Hu and An Tai, arXiv:hep-ex/0106017
    [7] V. N. Baier and V. S. Khoze, Nucl. Phys. B, 65: 381(1973); D. R. Yennie, S. C. Frautschi and H. Suura, Ann. Phys., 13: 379(1961)
    [8] E. A. Kuraev and V. S. Fadin, Sov. J. Nucl. Phys., 41: 466(1985)
    [9] G. Montagna, O. Nicrosini, F. Piccinini, Phys. Lett. B, 406: 243(1997)
    [10] K. A. Olive et al (Particle Data Group), Chin. Phys. C, 38: 1(2014)
    [11] G. Bonneau and F. Martin, Nucl. Phys. B, 27: 381(1971)
    [12] S. Actis et al, Eur. Phys. J. C, 66: 585(2010)
    [13] S. Eidelman and F. Jegerlehner, Z. Phys. C, 67: 585(1995)[hep-ph/9502298]; F. Jegerlehner, Nucl. Phys. Proc. Suppl., 162: 22(2006)[hep-ph/0608329]; F. Jegerlehner, Nucl. Phys. Proc. Suppl., 135: 181(2008); F. Jegerlehner, Nucl. Phys. Proc. Suppl., 126: 325(2004)[hep-ph/0310234]; F. Jegerlehner, hep-ph/0308117(2003)
    [14] B Aubert et al (Babar Collaboration), Phys. Rev. D, 73: 012005(2006)
    [15] A. Anotnelli et al, Nucl. Phys. B, 517: 3(1998)
    [16] B. Aubert et al (Babar Collaboration), Phys. Rev. D, 76: 092006(2007)
    [17] J. P. Lees et al (Babar Collaboration), Phys. Rev. D, 86: 032013(2012)
    [18] B. Aubert et al (Babar Collaboration), Phys. Rev. D, 70: 072004(2004)
    [19] B. Aubert et al (Babar Collaboration), Phys. Rev. D, 77: 092002(2008)
    [20] B. Aubert et al (Babar Collaboration), Phys. Rev. D, 71: 052001(2005)
    [21] V. P. Druzhinin (Babar Collaboration), arXiv:0710.3455
    [22] J. P. Lees et al (Babar Collaboration), arXiv:1103.3001
    [23] B. Aubert et al (Babar Collaboration), Phys. Rev. D, 76: 012008(2007)
    [24] B. Aubert et al (Babar Collaboration), Phys. Rev. D, 76: 092005(2007)
    [25] B. Aubert et al (Babar Collaboration), Phys. Rev. D, 73: 052003(2007)
    [26] M. R. Whalley, J. Phys. G, 29: A1(2003)
    [27] M. Ablikim et al (BES III Collaboration), Submitted to Phys. Lett. B.
    [28] T. K. Pedlar et al (CLEO Collaboration), Phys. Rev. Lett., 95: 261803(2005); Kamal K Seth et al, arXiv: 1210.1596
    [29] G. Pakhlova et al (Belle Collaboration), Phys. Rev. D, 77: 011103(2008)
    [30] G. Pakhlova et al (Belle Collaboration), Phys. Rev. Lett., 98: 092001(2007)[arXiv: hep-ex/0608018]
    [31] G. Pakhlova et al (Belle Collaboration), Phys.Rev.Lett., 100: 062001(2008)[arXiv: 0708.0082]
    [32] G. Pakhlova et al (Belle Collaboration), Phys. Rev. D, 80: 091101(2009)[arXiv: 0908.0231]
    [33] G. Pakhlova et al (Belle Collaboration), Phys. Rev. Lett., 101: 172001(2008)[arXiv: 0807.4458]
    [34] X. L. Wang et al (Belle Collaboration), Phys. Rev. D, 87: 051101(2013);
    [35] C. Z. Yuan et al (Belle Collaboration), Phys. Rev. Lett., 99: 182004(2007)[arXiv:0707.2541]
    [36] X. L. Wang et al (Belle Collaboration), Phys. Rev. Lett., 99:142002(2007)[arXiv:0707.3699]
    [37] M. Ablikim et al (BESIII Collaboration),Phys. Rev. Lett. 111: 242001(2013)
    [38] M. Ablikim et al (BESIII Collaboration),Phys. Rev. Lett. 113: 212002(2014)
    [39] C. Z. Yuan et al (Belle Collaboration),Phys. Rev. D 77: 011105(2008); arXiv: 0709.2565
    [40] C. Z. Yuan et al (Belle Collaboration), Phys. Rev. D, 77: 011105(2008)[arXiv: 0709.2565]
    [41] D. Cronin-Hennessy et al (CLEO Collaboration), Phys. Rev. D, 80: 072001(2009)
    [42] Pang Cai-Ying and Ping Rong-Gang, Chin. Phys. Letts., 24: 1411(2007)
    [43] M. Bahr et al, Eur. Phys. J. C, 58: 639(2008)
    [44] T. Sjostrand, S. Mrenna, and P. Skands, J. High Energy Phys., 0605: 026(2006)[hep-ph/0603175]
    [45] M. Ablikim et al, Nucl. Instrum. Methods A 614: 345(2010)
    [46] A. Buckley, H. Hoeth, H. Lacker et al, Eur. Phys. J. C, 65: 331(2010)
    [47] M. Althoff et al (TASSO Collaboration), Z. Phys. C, 26: 157(1984)
    [48] W. Braunschweig et al (TASSO Collaboration), Z. Phys. C, 41: 359(1988)
    [49] D. Buskulic et al (ALEPH Collaboration), Z. Phys. C, 55: 209(1992)
    [50] R. Barate et al (ALEPH Collaboration), Phys. Rep., 294: 1(1998)
    [51] K. Hamacher, M. Weierstall, hep-ex/9511011(1995)
    [52] P. Abreu et al (DELPHI Collaboration), Z. Phys. C, 73: 11(1996)
    [53] P. Abreu, W. Adam, and T. Adye et al, Z. Phys. C, 73: 11(1996)
    [54] F. James, CERN-D-506(1994); F. James and M. Roos, Comput. Phys. Commun., 10: 343(1975)
    [55] M. Ablikim et al, Phys. Lett. B, 677: 239(2009)
    [56] Z. Y. Deng et al, High Energy Physics and Nuclear Physics, 30: 371(2006) (in Chinese)
    [57] S. Jadach, B. F. L. Ward, and Z. Was, Phys. Rev. D, 63: 113009(2001); B. F. L. Ward, S. Jadach, and Z. Was, Nucl. Phys. B, Proc. Suppl. 116:73(2003)
    [58] Piotr Golonka and Zbigniew Was, Eur. Phys. J. C, 45: 97(2006)

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Get Citation
Rong-Gang Ping, Xi-An Xiong, Lei Xia, Zhen Gao, Ying-Tian Li, Xing-Yu Zhou, Bing-Xin Zhang, Bo Zheng, Wen-Biao Yan, Hai-Ming Hu and Guang-Shun Huang. Tuning and validation of hadronic event generator for R value measurements in the tau-charm region[J]. Chinese Physics C, 2016, 40(11): 113002. doi: 10.1088/1674-1137/40/11/113002
Rong-Gang Ping, Xi-An Xiong, Lei Xia, Zhen Gao, Ying-Tian Li, Xing-Yu Zhou, Bing-Xin Zhang, Bo Zheng, Wen-Biao Yan, Hai-Ming Hu and Guang-Shun Huang. Tuning and validation of hadronic event generator for R value measurements in the tau-charm region[J]. Chinese Physics C, 2016, 40(11): 113002.  doi: 10.1088/1674-1137/40/11/113002 shu
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Received: 2016-05-10
Revised: 2016-07-13
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    Supported by National Natural Science Foundation of China (11175146, 11375205, 11575077, 11335008, 11565006), Large Science Setup of Joint Foundation (10979059), and 100 Talents Program of CAS

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Tuning and validation of hadronic event generator for R value measurements in the tau-charm region

    Corresponding author: Rong-Gang Ping,
    Corresponding author: Bo Zheng,
  • 1.  Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
  • 2.  University of Science and Technology of China, Hefei 230026, China
  • 3.  University of South China, Hengyang, 421001, China
  • Received Date: 2016-05-10
  • Accepted Date: 2016-07-13
  • Available Online: 2016-11-05
Fund Project:  Supported by National Natural Science Foundation of China (11175146, 11375205, 11575077, 11335008, 11565006), Large Science Setup of Joint Foundation (10979059), and 100 Talents Program of CAS

Abstract: To measure the R value in an energy scan experiment with e+e- collisions, precise calculation of initial state radiation is required in the event generators. We present an event generator for this consideration, which incorporates initial state radiation effects up to second order accuracy. The radiative correction factor is calculated using the totally hadronic Born cross section. The measured exclusive processes are generated according to their cross sections, while the unknown processes are generated using the LUND Area Law model, and its parameters are tuned with data collected at √s=3.65 GeV. The optimized values are validated with data in the range √s=2.2324-3.671 GeV. These optimized parameters are universally valid for event generation below the DD threshold.

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