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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

Puzzle of the Λc Spectrum

Funds: National Natural Science Foundation of China (11475192, 11305003, 11222547, 11175073, 11447604, 11705056, U1204115)
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  • Corresponding author:

    LIU Xiang

  • Received Date: October 26, 2017
  • Revised Date: November 21, 2017
  • 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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