- Physical Review Journals
All JournalsPhysics Magazine

Physical Review D

Reuse & Permissions

It is not necessary to obtain permission to reuse this article or its components as it is available under the terms of the Creative Commons Attribution 4.0 International license. This license permits unrestricted use, distribution, and reproduction in any medium, provided attribution to the author(s) and the published article's title, journal citation, and DOI are maintained. Please note that some figures may have been included with permission from other third parties. It is your responsibility to obtain the proper permission from the rights holder directly for these figures.

Export citation

Export citation

Choose format for download:

Download Citation
  • Letter
  • Open Access

Invariant-mass spectrum of ΛΛ¯ pair in the process e+e−→ϕΛΛ¯

A. I. Milstein1,2,* and S. G. Salnikov1,2,†

  • 1Budker Institute of Nuclear Physics of SB RAS, 630090 Novosibirsk, Russia
  • 2Novosibirsk State University, 630090 Novosibirsk, Russia

  • *A.I.Milstein@inp.nsk.su
  • †S.G.Salnikov@inp.nsk.su
PDF

Phys. Rev. D 105, L031501 – Published 3 February, 2022

DOI: https://doi.org/10.1103/PhysRevD.105.L031501

Abstract

We show that the final-state interaction perfectly explains the recent experimental data of the BESIII Collaboration on the near-threshold invariant-mass spectrum of ΛΛ¯ in the process e+e−→ϕΛΛ¯. The position of the peak in the invariant-mass spectrum is above the threshold, though the interaction of Λ and Λ¯ is due to an attractive potential. This potential has a simple form and depends only on two parameters. We show that the invariant-mass spectrum is consistent with the quantum numbers JPC=1++ and 2++ of ΛΛ¯ pair but the quantum numbers JPC=2−+ are less likely.

View figure in article

Physics Subject Headings (PhySH)

Article Text

References (19)

  1. M. Ablikim et al. (BESIII Collaboration), Phys. Rev. D 104, 052006 (2021).
  2. B. Aubert et al. (BABAR Collaboraion), Phys. Rev. Lett. 102, 012001 (2009).
  3. X.-K. Dong, X.-H. Mo, P. Wang, and C.-Z. Yuan, Chin. Phys. C 44, 083001 (2020).
  4. R. Mizuk et al. (Belle Collaboraion), J. High Energy Phys. 06 (2021) 137.
  5. D. Atwood and W. J. Marciano, Phys. Rev. D 41, 1736 (1990).
  6. G. P. Lepage, Phys. Rev. D 42, 3251 (1990).
  7. N. Byers and E. Eichten, Phys. Rev. D 42, 3885 (1990).
  8. R. Kaiser, A. V. Manohar, and T. Mehen, Phys. Rev. Lett. 90, 142001 (2003).
  9. M. B. Voloshin, Mod. Phys. Lett. A 18, 1783 (2003).
  10. M. B. Voloshin, Yad. Fiz. 68, 804 (2005) [Phys. At. Nucl. 68, 771 (2005)].
  11. W. H. Liang, N. Ikeno, and E. Oset, Phys. Lett. B 803, 135340 (2020).
  12. A. I. Milstein and S. G. Salnikov, Phys. Rev. D 104, 014007 (2021).
  13. V. F. Dmitriev, A. I. Milstein, and S. G. Salnikov, Yad. Fiz. 77, 1234 (2014) [Phys. At. Nucl. 77, 1173 (2014)].
  14. V. F. Dmitriev, A. I. Milstein, and S. G. Salnikov, Phys. Rev. D 93, 034033 (2016).
  15. A. I. Milstein and S. G. Salnikov, Nucl. Phys. A977, 60 (2018).
  16. A. Sibirtsev, J. Haidenbauer, S. Krewald, U.-G. Meißner, and A. W. Thomas, Phys. Rev. D 71, 054010 (2005).
  17. J. Haidenbauer, U.-G. Meißner, and A. Sibirtsev, Phys. Rev. D 74, 017501 (2006).
  18. X.-W. Kang, J. Haidenbauer, and U.-G. Meißner, Phys. Rev. D 91, 074003 (2015).
  19. L.-Y. Dai, J. Haidenbauer, and U.-G. Meißner, Phys. Rev. D 98, 014005 (2018).

Outline

Information

Phys. Rev. D 105, L031501– Published 3 February, 2022
  • Received 3 October 2021
  • Accepted 20 January 2022
Crossmark - Check for updates button
Creative Commons Logo

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.

Published by the American Physical Society

Sign In to Your Journals Account

Filter

Filter

Article Lookup

Enter a citation