Interpretation of the observed 
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Chen, Bing; Luo, Shiping; Liu, Xiang; Matsuki, Takayuki

doi:10.1103/physrevd.100.094032

Cited by 34 publications

(40 citation statements)

References 32 publications

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“…Mode Within the chiral quark model and the L − S scheme, the authors predicted that the total decay widths of these six states lie in 7 ∼ 29 MeV [34], which show different features with ours. Also, our predictions on these D−wave Ω b states are quite different with the potential model calculations, where six Ω b (1D) states all have widths of several MeV [44]. Future experimental searches can help us to clarify these theoretical divergences.…”

Section: P 0 Model and Notationscontrasting

confidence: 71%

Strong decays of the newly observed narrow $$\Omega _b$$ structures

Wei

Lü

2020

Eur. Phys. J. C

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Motivated by the newly observed narrow structures Ω b (6316) − , Ω b (6330) − , Ω b (6340) − , and Ω b (6350) − in the Ξ 0 b K − mass spectrum, we investigate the strong decays of the low-lying Ω b states within the 3 P 0 model systematically. According to their masses and decay widths, the observedand Ω b (6350) − resonances can be reasonably assigned as the λ−mode Ω b (1P) states with J P = 1/2 − , 3/2 − , 3/2 − , and 5/2 − . Meanwhile, the remaining P−wave state with J P = 1/2 − should have a rather broad width, which can hardly be observed by experiments. For the Ω b (2S ) and Ω b (1D) states, our predictions show that these states have relatively narrow total widths and mainly decay into the Ξ bK , Ξ ′ bK and Ξ ′ * bK final states. These abundant theoretical predictions may be valuable for searching more excited Ω b states in future experiments.

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Section: P 0 Model and Notationscontrasting

confidence: 71%

Strong decays of the newly observed narrow $$\Omega _b$$ structures

Wei

Lü

2020

Eur. Phys. J. C

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“…For completeness, we also calculated the spectroscopic parameters of its charmed partner Λ c state with the same quantum numbers. The result for the mass of the Λ b state was obtained to be m Λ b ¼ ð6144 AE 68Þ MeV, which is in a good consistency with other theoretical predictions: m Λ b ¼ 6147 MeV [33], m Λ b ¼ 6190 MeV [18], m Λ b ¼ 6181 MeV [17], m Λ b ¼ 6145 MeV [7], m Λ b ¼ 6149 MeV [84], and 6.01 þ0. 20 −0.12 GeV [42].…”

Section: Discussionsupporting

confidence: 86%

“…The Λ b ð6146Þ 0 state was seen in Λ 0 b π þ π − channel by LHCb collaboration [4] and very recently confirmed by the CMS collaboration in the same channel [86]. The dominant decays of this state is considered to be Λ b ð6146Þ 0 → Σ b π and Λ b ð6146Þ 0 → Σ Ã b π [84]. Although, by considering the Λ b ð6146Þ 0 sate as a 1D-wave resonances with quantum numbers J P ¼ 3 2 þ and its decays to Σ b π and Σ Ã b π final states, the obtained total width via the quark potential model in this study is comparable with the experimental data within the presented errors, the LHCb collaboration could not find significant signals in these channels [4].…”

Section: Discussionmentioning

confidence: 89%

“…ðÃÞ Q π The dominant decays of Λ b ð6146Þ 0 is considered to be Λ b ð6146Þ 0 → Σ b π and Λ b ð6146Þ 0 → Σ Ã b π [84]. Hence, we consider these strong decays in this section.…”

Section: The Strong Decays λ Q → σmentioning

confidence: 99%

“…In Ref. [84], the following relation between the partial widths of the Λ b ð6146Þ 0 → Σ Ã b π and Λ b ð6146Þ 0 → Σ b π strong decays in p-and f-wave decays is obtained:…”

Section: The Strong Decays λ Q → σmentioning

confidence: 99%

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Λb(6146)0 state newly observed by LHCb

2020

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We study the bottom Λ b ð6146Þ 0 baryon, newly discovered by the LHCb Collaboration. By adopting an interpolating current of ðL ρ ; L λ Þ ¼ ð0; 2Þ type and D-wave nature with spin-parity quantum numbers J P ¼ 3 2 þ for this heavy bottom baryon, we calculate its mass and residue. Using these spectroscopic parameters, we also investigate its dominant decays Λ b ð6146Þ 0 → Σ b π and Λ b ð6146Þ 0 → Σ Ã b π and estimate the width of Λ b ð6146Þ 0 obtained via these channels. The obtained mass, m Λ b ¼ ð6144 AE 68Þ MeV is in accord nicely with the experimental data. The width obtained via the dominant channels is also consistent with the experimental data of LHCb collaboration. We calculate the spectroscopic parameters and the same decay channels for the c-partner of Λ b ð6146Þ 0 state, namely Λ c ð2860Þ þ , as well. We compare the obtained results with the existing theoretical predictions as well as experimental data. The results indicate that the state Λ b ð6146Þ 0 and its charmed-partner Λ c ð2860Þ þ can be considered as 1D-wave baryons with J P ¼ 3 2 þ .

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Observation of a new baryon state in the $$ {\Lambda}_{\mathrm{b}}^0{\pi}^{+}{\pi}^{-} $$ mass spectrum

Aaij¹,

Beteta²,

Ackernley³

et al. 2020

J. High Energ. Phys.

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A new baryon state is observed in the Λ 0 b π + π − mass spectrum with high significance using a data sample of pp collisions, collected with the LHCb detector at centre-of-mass energies √ s = 7, 8 and 13 TeV, corresponding to an integrated luminosity of 9 fb −1. The mass and natural width of the new state are measured to be m = 6072.3 ± 2.9 ± 0.6 ± 0.2 MeV , Γ = 72 ± 11 ± 2 MeV , where the first uncertainty is statistical and the second systematic. The third uncertainty for the mass is due to imprecise knowledge of the Λ 0 b baryon mass. The new state is consistent with the first radial excitation of the Λ 0 b baryon, the Λ b (2S) 0 resonance. Updated measurements of the masses and the upper limits on the natural widths of the previously observed Λ b (5912) 0 and Λ b (5920) 0 states are also reported.

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Interpretation of the observed Λb(6146)0 and Λb

Cited by 34 publications

References 32 publications

Strong decays of the newly observed narrow $$\Omega _b$$ structures

Strong decays of the newly observed narrow $$\Omega _b$$ structures

Λb(6146)0 state newly observed by LHCb

Observation of a new baryon state in the $$ {\Lambda}_{\mathrm{b}}^0{\pi}^{+}{\pi}^{-} $$ mass spectrum

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