Skip to main content
SpringerLink
Log in

Λc(2940)+: a possible molecular state?

  • Regular Article - Theoretical Physics
  • Published:
The European Physical Journal C Aims and scope Submit manuscript

Abstract

A new baryonic state Λc(2940)+ has recently been discovered by the Babar collaboration in the D0p channel. Later Belle collaboration also observed this state in the Σc(2455)0,++π±→Λc +π+π- channel. The mass of Λc(2940)+ is just a few MeV below the sum of D*0 and p masses suggesting a possibility that this state may be a D*0p molecular state. In this paper we study whether such a molecular state can be consistent with data. We find that the molecular structure can explain data and that if Λc(2940)+ is a D*0p molecular state it is likely a 1/2- state. Several other decays modes are also suggested to further test the molecular structure of Λc +(2940).

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. Babar Collaboration, B. Aubert et al., Phys. Rev. Lett. 98, 012001 (2007)

    Article  ADS  Google Scholar 

  2. CLEO Collaboration, M. Artuso et al., Phys. Rev. Lett. 86, 4479 (2001)

    Article  Google Scholar 

  3. Belle Collaboration, K. Abe et al., arXiv:hep-ex/0608043

  4. S. Migura, D. Merten, B. Metsch, H.R. Petry, Eur. Phys. J. A 28, 41 (2006)

    Article  ADS  Google Scholar 

  5. D. Pirjol, T.M. Yan, Phys. Rev. D 56, 5483 (1997)

    Article  ADS  Google Scholar 

  6. A.E. Blechman, A.F. Falk, D. Pirjol, J.M. Yelton, Phys. Rev. D 67, 074033 (2003)

    Article  ADS  Google Scholar 

  7. S.F. Tuan, Phys. Rev. D 15, 3478 (1977)

    Article  ADS  Google Scholar 

  8. J. Rosner, S.F. Tuan, Phys. Rev. D 27, 1544 (1983)

    Article  ADS  Google Scholar 

  9. S.F. Tuan, Phys. Lett. B 473, 136 (2000)

    Article  ADS  Google Scholar 

  10. J. Weinstein, N. Isgur, Phys. Rev. Lett. 48, 659 (1982)

    Article  ADS  Google Scholar 

  11. J. Weinstein, N. Isgur, Phys. Rev. D 27, 588 (1983)

    Article  ADS  Google Scholar 

  12. J. Weinstein, N. Isgur, Phys. Rev. D 41, 2236 (1990)

    Article  ADS  Google Scholar 

  13. A.D. Rujula, H. Georgi, S.L. Glashow, Phys. Rev. Lett. 38, 317 (1977)

    Article  ADS  Google Scholar 

  14. X. Liu, X.Q. Zeng, X.Q. Li, Phys. Rev. D 72, 054023 (2005)

    Article  ADS  Google Scholar 

  15. C.Z. Yuan, P. Wang, X.H. MO, Phys. Lett. B 634, 399 (2006)

    Article  ADS  Google Scholar 

  16. M.B. Voloshin, L.B. Okun, JETP Lett. 23, 333 (1976)

    ADS  Google Scholar 

  17. X.G. He, X.Q. Li, X. Liu, X.Q. Zeng, Eur. Phys. J. C 44, 419 (2005)

    Article  ADS  Google Scholar 

  18. V. Berestetskii, E. Lifshitz, L. Pitaevskii, Quantum Electrodynamics (Pergamon Press, New York, 1982)

    Google Scholar 

  19. M.P. Locher, Y. Lu, B.S. Zou, Z. Phys. A 347, 281 (1994)

    Article  ADS  Google Scholar 

  20. X.Q. Li, D.V. Bugg, B.S. Zou, Phys. Rev. D 55, 1423 (1997)

    Article  ADS  Google Scholar 

  21. In the literature, different types of the form factors are offered, and we have tried several of them and find that by slightly adjusting the corresponding phenomenological parameters, the results obtained with different types are close

  22. H.Y. Cheng, C.K. Chua, A. Soni, Phys. Rev. D 71, 014030 (2005)

    Article  ADS  Google Scholar 

  23. S.U. Chung, Phys. Rev. D 48, 1225 (1993)

    Article  ADS  Google Scholar 

  24. S. Eidelman et al., Phys. Lett. B 592, 1 (2004)

    Article  ADS  Google Scholar 

  25. N. Isgur, M. Wise, Phys. Rev. Lett. 66, 1130 (1991)

    Article  ADS  Google Scholar 

  26. N. Isgur, M. Wise, Phys. Lett. B 232, 113 (1989)

    Article  ADS  Google Scholar 

  27. N. Isgur, M. Wise, Phys. Lett. B 237, 527 (1990)

    Article  ADS  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Physics Department, Peking University, Beijing, 100871, P.R. China

    Xiao-Gang He, Xue-Qian Li, Xiang Liu & Xiao-Qiang Zeng

  2. Department of Physics and Center for Theoretical Sciences, National Taiwan University, Taipei, 1067, Taiwan

    Xiao-Gang He

Authors
  1. Xiao-Gang He
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Xue-Qian Li
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Xiang Liu
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Xiao-Qiang Zeng
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Xiang Liu.

Additional information

PACS

13.30.Eg; 14.20.Lg; 12.39.Pn

Rights and permissions

Reprints and permissions

About this article

Cite this article

He, XG., Li, XQ., Liu, X. et al. Λc(2940)+: a possible molecular state?. Eur. Phys. J. C 51, 883–889 (2007). https://doi.org/10.1140/epjc/s10052-007-0347-y

Download citation

  • Received:

  • Revised:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1140/epjc/s10052-007-0347-y

Keywords

Search

Navigation