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  • Letter
  • Open Access

Identifying the two-pole structure of the Λ(1405) using an SU(3) flavor filter

Ying-Bo He1, Xiao-Hai Liu1,*, Li-Sheng Geng2,7,8,†, Feng-Kun Guo3,4,7,8,‡, and Ju-Jun Xie5,6,7,§

  • *Contact author: xiaohai.liu@tju.edu.cn
  • †Contact author: lisheng.geng@buaa.edu.cn
  • ‡Contact author: fkguo@itp.ac.cn
  • §Contact author: xiejujun@impcas.ac.cn
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Phys. Rev. D 113, L051501 – Published 4 March, 2026

DOI: https://doi.org/10.1103/5sr9-tzj6

Abstract

We propose a novel method to identify the two-pole structure of the Λ(1405). The two poles owe their origin to different quark flavor irreducible representations in the meson-baryon coupled-channel interactions, thus they should be individually manifested in reactions that provide good flavor eigenstate sources. Hadronic decays of charmonia into Λ¯Σπ and Λ¯(1520)Σπ are such reactions, and the flavor octet and singlet poles can be approximately singled out in these two decay modes. This SU(3) flavor filter works even considering the flavor symmetry breaking. With the huge charmonium data sets collected, it is therefore promising to solve the long-standing Λ(1405) puzzle employing the proposed flavor filter.

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References (52)

  1. R. H. Dalitz and S. F. Tuan, Phys. Rev. Lett. 2, 425 (1959).
  2. M. H. Alston, L. W. Alvarez, P. Eberhard, M. L. Good, W. Graziano, H. K. Ticho, and S. G. Wojcicki, Phys. Rev. Lett. 6, 698 (1961).
  3. S. Navas et al. (Particle Data Group), Phys. Rev. D 110, 030001 (2024).
  4. N. Kaiser, P. B. Siegel, and W. Weise, Nucl. Phys. A594, 325 (1995).
  5. E. Oset and A. Ramos, Nucl. Phys. A635, 99 (1998).
  6. M. F. M. Lutz and E. E. Kolomeitsev, Nucl. Phys. A700, 193 (2002).
  7. J. A. Oller and U. G. Meissner, Phys. Lett. B 500, 263 (2001).
  8. E. Oset, A. Ramos, and C. Bennhold, Phys. Lett. B 527, 99 (2002); 530, 260(E) (2002).
  9. M. Tanabashi et al. (Particle Data Group), Phys. Rev. D 98, 030001 (2018).
  10. D. Jido, A. Hosaka, J. C. Nacher, E. Oset, and A. Ramos, Phys. Rev. C 66, 025203 (2002).
  11. C. Garcia-Recio, J. Nieves, E. Ruiz Arriola, and M. J. Vicente Vacas, Phys. Rev. D 67, 076009 (2003).
  12. T. Hyodo and D. Jido, Prog. Part. Nucl. Phys. 67, 55 (2012).
  13. B. Borasoy, R. Nissler, and W. Weise, Eur. Phys. J. A 25, 79 (2005).
  14. Y. Ikeda, T. Hyodo, and W. Weise, Nucl. Phys. A881, 98 (2012).
  15. F. K. Guo, Y. Kamiya, M. Mai, and U. G. Meißner, Phys. Lett. B 846, 138264 (2023).
  16. J. X. Lu, L. S. Geng, M. Doering, and M. Mai, Phys. Rev. Lett. 130, 071902 (2023).
  17. T. Hyodo and M. Niiyama, Prog. Part. Nucl. Phys. 120, 103868 (2021).
  18. M. Mai, Eur. Phys. J. Spec. Top. 230, 1593 (2021).
  19. U. G. Meißner, Symmetry 12, 981 (2020).
  20. D. Jido, J. A. Oller, E. Oset, A. Ramos, and U. G. Meissner, Nucl. Phys. A725, 181 (2003).
  21. J. J. de Swart, Rev. Mod. Phys. 35, 916 (1963); 37, 326(E) (1965).
  22. J. M. Xie, J. X. Lu, L. S. Geng, and B. S. Zou, Phys. Rev. D 108, L111502 (2023).
  23. J. M. Xie, J. X. Lu, L. S. Geng, and B. S. Zou, EPJ Web Conf. 303, 01011 (2024).
  24. Z. Zhuang, R. Molina, J. X. Lu, and L. S. Geng, Sci. Bull. 70, 1953 (2025).
  25. L. Roca, E. Oset, and J. Singh, Phys. Rev. D 72, 014002 (2005).
  26. L. S. Geng, E. Oset, L. Roca, and J. A. Oller, Phys. Rev. D 75, 014017 (2007).
  27. E. E. Kolomeitsev and M. F. M. Lutz, Phys. Lett. B 582, 39 (2004).
  28. F. K. Guo, P. N. Shen, H. C. Chiang, R. G. Ping, and B. S. Zou, Phys. Lett. B 641, 278 (2006).
  29. F. K. Guo, P. N. Shen, and H. C. Chiang, Phys. Lett. B 647, 133 (2007).
  30. M. Albaladejo, P. Fernandez-Soler, F. K. Guo, and J. Nieves, Phys. Lett. B 767, 465 (2017).
  31. R. Molina, W. H. Liang, C. W. Xiao, Z. F. Sun, and E. Oset, Phys. Lett. B 856, 138872 (2024).
  32. H. Y. Lu et al. (CLAS Collaboration), Phys. Rev. C 88, 045202 (2013).
  33. H. Zhang, J. Tulpan, M. Shrestha, and D. M. Manley, Phys. Rev. C 88, 035205 (2013).
  34. H. Kamano, S. X. Nakamura, T. S. H. Lee, and T. Sato, Phys. Rev. C 92, 025205 (2015); 95, 049903(E) (2017).
  35. M. Matveev, A. V. Sarantsev, V. A. Nikonov, A. V. Anisovich, U. Thoma, and E. Klempt, Eur. Phys. J. A 55, 179 (2019).
  36. A. V. Sarantsev, M. Matveev, V. A. Nikonov, A. V. Anisovich, U. Thoma, and E. Klempt, Eur. Phys. J. A 55, 180 (2019).
  37. E. Klempt, V. Burkert, U. Thoma, L. Tiator, and R. Workman (Baryon@PDG Group), Eur. Phys. J. A 56, 261 (2020).
  38. M. Ablikim et al. (BESIII Collaboration), Chin. Phys. C 44, 040001 (2020).
  39. M. Achasov, X. C. Ai, R. Aliberti, L. P. An, Q. An, X. Z. Bai, Y. Bai, O. Bakina, A. Barnyakov, V. Blinov et al., Front. Phys. (Beijing) 19, 14701 (2024).
  40. E. Wang, J. J. Xie, and E. Oset, Phys. Lett. B 753, 526 (2016).
  41. L. J. Liu, E. Wang, J. J. Xie, K. L. Song, and J. Y. Zhu, Phys. Rev. D 98, 114017 (2018).
  42. X. K. Dong, F. K. Guo, and B. S. Zou, Phys. Rev. Lett. 126, 152001 (2021).
  43. V. Baru, F. K. Guo, C. Hanhart, and A. Nefediev, Phys. Rev. D 109, L111501 (2024).
  44. Y. Ikeda, T. Hyodo, and W. Weise, Phys. Lett. B 706, 63 (2011).
  45. Z. H. Guo and J. A. Oller, Phys. Rev. C 87, 035202 (2013).
  46. M. Mai and U. G. Meißner, Eur. Phys. J. A 51, 30 (2015).
  47. M. Ablikim et al. (BESIII Collaboration), Phys. Rev. D 108, 112012 (2023).
  48. S. Aikawa et al. (J-PARC E31 Collaboration), Phys. Lett. B 837, 137637 (2023).
  49. J. Bulava et al. (Baryon Scattering (BaSc) Collaboration), Phys. Rev. Lett. 132, 051901 (2024).
  50. J. Bulava et al. (Baryon Scattering (BaSc) Collaboration), Phys. Rev. D 109, 014511 (2024).
  51. X. L. Ren, Phys. Lett. B 855, 138802 (2024).
  52. Y. H. Chen, L. Y. Dai, F. K. Guo, and B. Kubis, Phys. Rev. D 99, 074016 (2019).

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Phys. Rev. D 113, L051501– Published 4 March, 2026
  • Received 29 July 2024
  • Accepted 13 February 2026
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