\begin{document}$ J/\psi $\end{document} pair hadroproduction at next-to-leading order (NLO) in the nonrelativstic-QCD (NRQCD) framework with the \begin{document}$ c\bar{c} $\end{document} pair either in the \begin{document}$ {}^{3}S_1^{[1]} $\end{document} or \begin{document}$ {}^{1}S_0^{[8]} $\end{document} fock states. It is found that the \begin{document}$ {}^{1}S_0^{[8]} $\end{document}channel contribution at NLO is essential. Our results indicate that for the CMS, the NRQCD predictions cannot describe the experimental data at all, and the total cross section predicted via NRQCD is smaller than the experimental data by an order of magnitude. Therefore, new mechanisms are needed to understand the CMS data for \begin{document}$ J/\psi $\end{document} pair production."> <i>J</i>/<i>ψ</i> pair hadroproduction at next-to-leading order in nonrelativistic-QCD at CMS -
  • [1]

    G. T. Bodwin, E. Braaten, and G. P. Lepage, Phys. Rev. D51, 1125 (1995)

  • [2]

    Y. Fan, Y. Q. Ma, and K. T. Chao, Phys. Rev. D79, 114009 (2009)

  • [3]

    Y. J. Zhang, Y. Q. Ma, K. Wanget al., Phys. Rev. D81, 034015 (2010)

  • [4]

    Y. Q. Ma, K. Wang, and K. T. Chao, Phys. Rev. D83, 111503 (2011)

  • [5]

    Z. G. He, Y. Fan, and K. T. Chao, Phys. Rev. D75, 074011 (2007)

  • [6]

    Y. Q. Ma, K. Wang, and K. T. Chao, Phys. Rev. Lett.106, 042002 (2011)

  • [7]

    Y. Q. Ma, K. Wang, and K. T. Chao, Phys. Rev. D84, 114001 (2011)

  • [8]

    B. Gong, and J. X. Wang, Phys. Rev. Lett.100, 232001 (2008)

  • [9]

    B. Gong, and J. X. Wang, Phys. Rev. D78, 074011 (2008)

  • [10]

    B. Gong, X. Q. Li, and J. X. Wang, Phys. Lett. B673, 197 (2009)

  • [11]

    R. Li, and J. X. Wang, Phys. Lett. B672, 51 (2009)

  • [12]

    B. Gong, and J. X. Wang, Phys. Rev. D83, 114021 (2011)

  • [13]

    B. Gong, L. P. Wan, J. X. Wanget al., Phys. Rev. Lett.112, 032001 (2014)

  • [14]

    R. Aaijet al. (LHCb Collaboration), Phys. Lett. B707, 52 (2012)

  • [15]

    CMS Physics Analysis Summary, CMS PAS BPH-11-021, 2013

  • [16]

    The ATLAS Collaboration, Eur. Phys. J. C77, 76 (2017)

  • [17]

    R. Li, Y. J. Zhang, and K. T. Chao, Phys. Rev. D80, 014020 (2009)

  • [18]

    C. F. Qiao, L. P. Sun, and P. Sun, J. Phys. G37, 075019 (2010)

  • [19]

    A. V. Berezhnoy, A. K. Likhoded, A. V. Luchinskyet al., Phys. Rev. D84, 094023 (2011)

  • [20]

    Y. J. Li, G. Z. Xu, K. Y. Liuet al., J. High Energy Phys., 1307 051 (2013)

  • [21]

    J. P. Lansberg and H. S. Shao, Phys. Rev. Lett.111, 122001 (2013)

  • [22]

    J. P. Lansberg and H. S. Shao, arXiv:1410.8822

  • [23]

    L. P. Sun, H. Han, and K. T. Chao, Phys. Rev. D94, 074033 (2016)

  • [24]

    Z. G. He and B. A. Kniehl, Phys. Rev. Lett.115, 022002 (2015)

  • [25]

    C. H. Com, A. Kulesza, and W. J. Stirling, Phys. Rev. Lett.107, 082002 (2011)

  • [26]

    D. d'Enterria and A. M. Snigirev, Phys. Lett. B727, 157 (2013)

  • [27]

    S. Baranov, A. Snigirev, and N. Zotov, Phys. Lett. B705, 116 (2011)

  • [28]

    J. P. Lansberg, H. S. Shao, N. Yamanakaet al., arXiv:2004.14345

  • [29]

    A. A. Chernyshev and V. A. Saleev, Phys. Rev. D106, 114006 (2022)

  • [30]

    G. T. Bodwin, H. S. Chung, U. Kimet al., Phys. Rev. Lett.113, 022001 (2014)

  • [31]

    Z. B. Kang, Y. Q. Ma, J. W. Qiuet al., Phys. Rev. D90, 034006 (2014)

  • [32]

    B. W. Harris and J. F. Owens, Phys. Rev. D65, 094032 (2002)

  • [33]

    T. Hahn, Comput. Phys. Commun.140, 418 (2001)

  • [34]

    T. Hahn, Comput. Phys. Commun.168, 2 (2005)

  • [35]

    H.L. Laiet al. (CTEQ Collaboration), Eur. Phys. J. C12, 375 (2000)

  • [36]

    J. Pumplinet al., J. High Energy Phys.07, 012 (2002)

  • [37]

    G. T. Bodwin, H. S. Chung, D. Kanget al., Phys. Rev. D77, 094017 (2008)

  • [38]

    K. T. Chao, Y. Q. Ma, H. S. Shaoet al., Phys. Rev. Lett.108, 242004 (2012)

Baidu
map