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  • Letter
  • Open Access

J/ψ polarization and pT distribution in cc¯ associated hadroproduction at O(αs5)

Qi-Ming Feng1 and Cong-Feng Qiao1,2,*

  • *Contact author: qiaocf@ucas.ac.cn
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Phys. Rev. D 112, L071501 – Published 2 October, 2025

DOI: https://doi.org/10.1103/htrt-26ws

Abstract

The quarkonium production in association with a heavy-quark pair of the same flavor was found to play an important role in various production schemes and provide a distinctive signature that could be studied in experiment. Within the nonrelativistic QCD framework, we perform the first complete calculation of the hadroproduction process gg→J/ψ+cc¯ at the next-to-leading order (NLO) in the expansion of strong coupling constant αs. The result tells us that the NLO corrections substantially enhance the color-singlet yield and alter the predicted polarization patterns and, hence, lead to a better agreement with experimental data across the pT spectrum. In contrast to charm-quark fragmentation, the fixed-order J/ψ and cc¯ associated production channel displays a markedly different kinematic behavior. While the inclusion of this process greatly reduces the discrepancy between color-singlet theoretical prediction and experimental measurement, a residual gap of approximately 1 order of magnitude still remains.

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References (40)

  1. G. T. Bodwin, E. Braaten, and G. P. Lepage, Phys. Rev. D 51, 1125 (1995); 55, 5853(E) (1997).
  2. G. T. Bodwin, arXiv:1208.5506.
  3. C. H. Chang, R. Li, and J. X. Wang, Phys. Rev. D 80, 034020 (2009).
  4. P. Artoisenet, J. M. Campbell, F. Maltoni, and F. Tramontano, Phys. Rev. Lett. 102, 142001 (2009).
  5. J. M. Campbell, F. Maltoni, and F. Tramontano, Phys. Rev. Lett. 98, 252002 (2007).
  6. J. P. Lansberg, Phys. Lett. B 695, 149 (2011).
  7. P. Artoisenet, J. P. Lansberg, and F. Maltoni, Phys. Lett. B 653, 60 (2007).
  8. B. Gong and J. X. Wang, Phys. Rev. Lett. 100, 232001 (2008).
  9. M. Kramer, J. Zunft, J. Steegborn, and P. M. Zerwas, Phys. Lett. B 348, 657 (1995).
  10. M. Krämer, Nucl. Phys. B459, 3 (1996).
  11. M. Butenschoen and B. A. Kniehl, Phys. Rev. Lett. 104, 072001 (2010).
  12. M. Butenschoen and B. A. Kniehl, Phys. Rev. Lett. 108, 172002 (2012).
  13. M. Butenschoen and B. A. Kniehl, Phys. Rev. Lett. 107, 232001 (2011).
  14. K. T. Chao, Y. Q. Ma, H. S. Shao, K. Wang, and Y. J. Zhang, Phys. Rev. Lett. 108, 242004 (2012).
  15. Y. Q. Ma, K. Wang, and K. T. Chao, Phys. Rev. D 84, 114001 (2011).
  16. Y. Q. Ma, K. Wang, and K. T. Chao, Phys. Rev. Lett. 106, 042002 (2011).
  17. Y. J. Zhang, Y. Q. Ma, K. Wang, and K. T. Chao, Phys. Rev. D 81, 034015 (2010).
  18. B. Gong, L. P. Wan, J. X. Wang, and H. F. Zhang, Phys. Rev. Lett. 110, 042002 (2013).
  19. N. Brambilla, M. Butenschoen, and X. P. Wang, Phys. Rev. D 112, L011902 (2025).
  20. S. Chatrchyan et al. (CMS Collaboration), Phys. Lett. B 727, 381 (2013).
  21. A. Hayrapetyan et al. (CMS Collaboration), Phys. Lett. B 858, 139044 (2024).
  22. C. F. Qiao and J. X. Wang, Phys. Rev. D 69, 014015 (2004).
  23. Y. J. Zhang and K. T. Chao, Phys. Rev. Lett. 98, 092003 (2007).
  24. Z. Q. Chen, L. B. Chen, and C. F. Qiao, Phys. Rev. D 95, 036001 (2017).
  25. Q. M. Feng and C. F. Qiao, Phys. Rev. D 110, 094047 (2024).
  26. E. Braaten and J. Russ, Annu. Rev. Nucl. Part. Sci. 64, 221 (2014).
  27. P. Faccioli, C. Lourenco, J. Seixas, and H. K. Wohri, Eur. Phys. J. C 69, 657 (2010).
  28. P. Mastrolia, E. Mirabella, and T. Peraro, J. High Energy Phys. 06 (2012) 095; 11 (2012) 128(E).
  29. T. Peraro, Comput. Phys. Commun. 185, 2771 (2014).
  30. Z. Wu, J. Boehm, R. Ma, H. Xu, and Y. Zhang, Comput. Phys. Commun. 295, 108999 (2024).
  31. B. W. Harris and J. F. Owens, Phys. Rev. D 65, 094032 (2002).
  32. S. Dittmaier, Nucl. Phys. B675, 447 (2003).
  33. J. Pumplin, D. R. Stump, J. Huston, H. L. Lai, P. M. Nadolsky, and W. K. Tung, J. High Energy Phys. 07 (2002) 012.
  34. P. A. Zyla et al. (Particle Data Group), Prog. Theor. Exp. Phys. 2020, 083C01 (2020).
  35. G. Aad et al. (ATLAS Collaboration), Eur. Phys. J. C 84, 169 (2024).
  36. G. Aad et al. (ATLAS Collaboration), J. High Energy Phys. 07 (2014) 154.
  37. Y. J. Zhang, Y. Q. Ma, and K. T. Chao, Phys. Rev. D 78, 054006 (2008).
  38. E. Braaten, K. m. Cheung, and T. C. Yuan, Phys. Rev. D 48, 4230 (1993).
  39. X. C. Zheng, C. H. Chang, and X. G. Wu, Phys. Rev. D 100, 014005 (2019).
  40. B. Gong, R. Li, and J. X. Wang, arXiv:1102.0118.

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Phys. Rev. D 112, L071501– Published 2 October, 2025
  • Received 25 August 2025
  • Accepted 19 September 2025
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

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