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LÜ Qifang, DONG Yubing, LIU Xiang, MATSUKI Takayuki. Puzzle of the Λc Spectrum[J]. Nuclear Physics Review, 2018, 35(1): 1-4. doi: 10.11804/NuclPhysRev.35.01.001
Citation: LÜ Qifang, DONG Yubing, LIU Xiang, MATSUKI Takayuki. Puzzle of the Λc Spectrum[J]. Nuclear Physics Review, 2018, 35(1): 1-4. doi: 10.11804/NuclPhysRev.35.01.001
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Puzzle of the Λc Spectrum

doi: 10.11804/NuclPhysRev.35.01.001
  • 1.

    Department of Physics, Hunan Normal University, Changsha 410081, China;

  • 2.

    Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China;

  • 3.

    Theoretical Physics Center for Science Facilities(TPCSF), Chinese Academy of Sciences, Beijing 100049, China;

  • 4.

    School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China;

  • 5.

    Research Center for Hadron and CSR Physics, Lanzhou University & Institute of Modern Physics of CAS, Lanzhou 730000, China;

  • 6.

    Tokyo Kasei University, 1-18-1 Kaga, Itabashi, Tokyo 173-8602, Japan;

  • 7.

    Theoretical Research Division, Nishina Center, RIKEN, Wako, Saitama 351-0198, Japan

Funds:  National Natural Science Foundation of China (11475192, 11305003, 11222547, 11175073, 11447604, 11705056, U1204115)
More Information
  • Corresponding author: LIU Xiang
  • Received Date: 2017-10-27
  • Rev Recd Date: 2017-11-22
  • Publish Date: 2018-03-20
  • There is a puzzle in the Λc+ family, i.e., one member with JP=3/2+ is missing in a L=2 multiplet which the heavy quark effective theory predicts, and JP's of Λc(2765)+ and Λc(2940)+ are unknown. Using a light diquark picture to calculate baryon masses, we study possible assignments of two Λc's with unknown JP and the missing Λc+ with 3/2+ for L=2, and we find the most probable possibility that the peak corresponding to Λc(2880)+ actually includes a missing member with spin 3/2+ for L=2 and that quantum numbers of Λc(2765)+ and Λc(2940)+ are 2S(1/2+) and 2P (1/2-), respectively.
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    [4] OLIVE K A[Particle Data Group Collaboration]. Chin Phys C, 2014, 38:090001.
    [5] DONG Y B, FAESSLER A, GUTSCHE T, et al. Phys Rev D, 2010, 81:014006.
    [6] DONG Y B, FAESSLER A, GUTSCHE T,et al. Phys Rev D, 2010, 82:034035.
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    [11] CHEN B, WEI K W, LIU X, MATSUKI T. arXiv:1609.07967[hep-ph].
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Puzzle of the Λc Spectrum

doi: 10.11804/NuclPhysRev.35.01.001
  • 1. Department of Physics, Hunan Normal University, Changsha 410081, China;
  • 2. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China;
  • 3. Theoretical Physics Center for Science Facilities(TPCSF), Chinese Academy of Sciences, Beijing 100049, China;
  • 4. School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China;
  • 5. Research Center for Hadron and CSR Physics, Lanzhou University & Institute of Modern Physics of CAS, Lanzhou 730000, China;
  • 6. Tokyo Kasei University, 1-18-1 Kaga, Itabashi, Tokyo 173-8602, Japan;
  • 7. Theoretical Research Division, Nishina Center, RIKEN, Wako, Saitama 351-0198, Japan
Funds:  National Natural Science Foundation of China (11475192, 11305003, 11222547, 11175073, 11447604, 11705056, U1204115)
    Corresponding author: LIU Xiang
  • Received Date: 2017-10-27
  • Rev Recd Date: 2017-11-22
  • Publish Date: 2018-03-20

Abstract: There is a puzzle in the Λc+ family, i.e., one member with JP=3/2+ is missing in a L=2 multiplet which the heavy quark effective theory predicts, and JP's of Λc(2765)+ and Λc(2940)+ are unknown. Using a light diquark picture to calculate baryon masses, we study possible assignments of two Λc's with unknown JP and the missing Λc+ with 3/2+ for L=2, and we find the most probable possibility that the peak corresponding to Λc(2880)+ actually includes a missing member with spin 3/2+ for L=2 and that quantum numbers of Λc(2765)+ and Λc(2940)+ are 2S(1/2+) and 2P (1/2-), respectively.

LÜ Qifang, DONG Yubing, LIU Xiang, MATSUKI Takayuki. Puzzle of the Λc Spectrum[J]. Nuclear Physics Review, 2018, 35(1): 1-4. doi: 10.11804/NuclPhysRev.35.01.001
Citation: LÜ Qifang, DONG Yubing, LIU Xiang, MATSUKI Takayuki. Puzzle of the Λc Spectrum[J]. Nuclear Physics Review, 2018, 35(1): 1-4. doi: 10.11804/NuclPhysRev.35.01.001
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