HEPData

Abstract

A narrow pentaquark state, $P_c(4312)^+$, decaying to $J/\psi p$ is discovered with a statistical significance of $7.3\sigma$ in a data sample of ${\Lambda_b^0\to J/\psi p K^-}$ decays which is an order of magnitude larger than that previously analyzed by the LHCb collaboration. The $P_c(4450)^+$ pentaquark structure formerly reported by LHCb is confirmed and observed to consist of two narrow overlapping peaks, $P_c(4440)^+$ and $P_c(4457)^+$, where the statistical significance of this two-peak interpretation is $5.4\sigma$. Proximity of the $\Sigma_c^+\bar{D}^{0}$ and $\Sigma_c^+\bar{D}^{*0}$ thresholds to the observed narrow peaks suggests that they play an important role in the dynamics of these states.

Table 1

Fig. 1; supplementary material Fig. CDS3a

10.17182/hepdata.89271.v1/t1

Distribution of $(J/\psi p)$ system invariant mass from the decay of $\Lambda_{b}^{0}$ candidates in the channel $\Lambda_{b}^{0} \to J/\psi p...
https://www.hepdata.net/record/data/418627yaml https://www.hepdata.net/record/data/418627/csvcsv
Table 2

Fig. 3; supplementary material Fig. CDS3b

10.17182/hepdata.89271.v1/t2

Distribution of $(J/\psi p)$ system invariant mass from the decay of $\Lambda_{b}^{0}$ candidates in the channel $\Lambda_{b}^{0} \to J/\psi p...
https://www.hepdata.net/record/data/418628yaml https://www.hepdata.net/record/data/418628/csvcsv
Table 3

Fig. 6; supplementary material Fig. CDS3c

10.17182/hepdata.89271.v1/t3

$\cos \theta_{P_c}$-weighted ditribution of $(J/\psi p)$ system invariant mass from the decay of $\Lambda_{b}^{0}$ candidates in the channel $\Lambda_{b}^{0} \to...
https://www.hepdata.net/record/data/418629yaml https://www.hepdata.net/record/data/418629/csvcsv
Table 4

Fig. 4; supplementary material Fig. CDS5

10.17182/hepdata.89271.v1/t4

Spline interpolation of the weight function (depending of $\cos \theta_{P_c}$) applied to $\Lambda_{b}^{0}$ candidates. The weight function is determined as...
https://www.hepdata.net/record/data/418630yaml https://www.hepdata.net/record/data/418630/csvcsv

Table 1

Table 2

Table 3

Table 4

JSON

YAML

YODA

ROOT

CSV

Visualize

Table 1

Table 2

Table 3

Table 4

Ask a Question

Table 1

Table 2

Table 3

Table 4

JSON YAML YODA ROOT CSV

Visualize

Ask a Question

JSON

YAML

YODA

ROOT

CSV