| Article | |
| Report number | arXiv:2004.00531 |
| Title | Identifying the $\Xi_c^0$ baryons observed by LHCb as $P$-wave $\Xi_c^\prime$ baryons |
| Author(s) | Yang, Hui-Min (Beihang U.) ; Chen, Hua-Xing (Beihang U. ; Southeast U., Nanjing) ; Mao, Qiang |
| Publication | 2020-12-07 |
| Imprint | 2020-04-01 |
| Number of pages | 16 |
| Note | 16 pages, 1 figure, 3 tables, accepted by PRD |
| In: | Phys. Rev. D 102 (2020) pp.114009 |
| DOI | 10.1103/PhysRevD.102.114009 10.1103/PhysRevD.102.114009 (publication) |
| Subject category | hep-lat ; Particle Physics - Lattice ; hep-ex ; Particle Physics - Experiment ; hep-ph ; Particle Physics - Phenomenology |
| Accelerator/Facility, Experiment | CERN LHC ; LHCb |
| Abstract | We systematically study mass spectra and decay properties of $P$-wave $\Xi_c^\prime$ baryons of the $SU(3)$ flavor $\mathbf{6}_F$, using the methods of QCD sum rules and light-cone sum rules within the framework of heavy quark effective theory. Our results suggest that the three excited $\Xi_c^0$ baryons recently observed by LHCb can be well explained as $P$-wave $\Xi_c^\prime$ baryons: the $\Xi_c(2923)^0$ and $\Xi_c(2939)^0$ are partner states of $J^P = 1/2^-$ and $3/2^-$ respectively, both of which contain one $\lambda$-mode orbital excitation; the $\Xi_c(2965)^0$ has $J^P = 3/2^-$, and also contains one $\lambda$-mode orbital excitation. We propose to search for another $P$-wave $\Xi_c^\prime$ state of $J^P = 5/2^-$ in the $\Lambda_c K/\Xi_c \pi$ mass spectral in future experiments. Its mass is about $56^{+30}_{-35}$ MeV larger than the $\Xi_c(2965)^0$, and its width is about $18.1^{+19.7}_{- 8.3}$ MeV. |
| Copyright/License | preprint: (Licenses: CC-BY-4.0, arXiv nonexclusive-distrib 1.0) |
Corresponding record in: Inspire
Record created 2021-03-27, last modified 2022-01-04