Phenomenological predictions for pentaquark masses from fits to baryon masses

Abstract

We investigate the mass spectra of exotic hadrons known as pentaquarks. We extend a simple phenomenological model based on the Gürsey-Radicati mass formula for hadrons to include both charmed and bottom baryons as well as to be able to predict masses of pentaquark states including both charm and bottom quark-antiquark pairs. In particular, we perform numerical fits of this model, which includes seven free parameters, to masses of 21 baryons. We find that the model can be well fitted to the experimental values of the baryon masses and observe that the predicted value of about 4400 MeV for the mass of the pentaquark $P_c(4380{)}^{+}$ lies within the experimental range reported by the LHCb experiment. In addition, the predicted value of about 4500 MeV for the mass of the pentaquark $P_c(4450{)}^{+}$ is close to the experimental value. Finally, in the future, other predicted values for masses of additional pentaquarks could be shown to agree with upcoming experimental results.

6 pages, 2 figures. Final version published in Phys. Lett. B

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Cited by in corpus (10)

• Molecular Interpretation of the $P_c(4440)$ and $P_c(4457)$ States
• Partial decay widths of $P_c(4312)$ as a $\bar{D}{\Sigma }_c$ molecular state
• Tetraquark Masses by using extension of Gursey-Radicati Mass Formula
• Hidden-Bottom Pentaquarks: Mass Spectrum, Magnetic Moments and Partial Widths
• Spectroscopic Analysis of Hidden-Charm Pentaquarks
• Phenomenological Analysis of Triply Heavy Pentaquarks with configurations $q\Bar{q}QQQ$ and $qqQQ\Bar{Q}$
• Masses and Magnetic Moments of Singly Heavy Pentaquarks
• Study of Fully heavy Pentaquarks using extended Gursey-Radicati formalism
• Compact $N$-quark Hadron Mass Dependence on $N^4$: A Classical Field Picture
• Phenomenological mass model for exotic hadrons and predictions for masses of non-strange dibaryons as hexaquarks