A triangle singularity and the LHCb pentaquarks

Abstract

In this article, a possible interpretation of the pentaquark candidates recently observed at LHCb is given. We show that the reaction dynamics and the peculare kinematics situation can produce the peak in the spectrum and the sharp phase motion. The mechanism called triangle singularity likely causes the appearance of the new pentaquarks candidates.

4 pages, 3 figure

Cited by in corpus (15)

• Observation of a narrow pentaquark state, $P_c(4312{)}^{+}$, and of two-peak structure of the $P_c(4450{)}^{+}$
• Exotics: Heavy Pentaquarks and Tetraquarks
• Analysis of the $P_c(4380)$ and $P_c(4450)$ as pentaquark states in the diquark model with QCD sum rules
• Formation of hidden-charm pentaquarks in photon-nucleon collisions
• Exotic Hadrons from Heavy Ion Collisions
• Evidence for exotic hadron contributions to ${\Lambda }_b^0\to J/\psi p{\pi }^{-}$ decays
• Some Predictions of Diquark Model for Hidden Charm Pentaquark Discovered at the LHCb
• Non-strange and strange pentaquarks with hidden charm
• Analysis of the ${\frac{1}{2}}^{\pm }$ pentaquark states in the diquark-diquark-antiquark model with QCD sum rules
• Hidden-charm molecular pentaquarks and their charm-strange partners
• Observation of the decays ${\Lambda }_b^0\to {\chi }_{c1}p{K}^{-}$ and ${\Lambda }_b^0\to {\chi }_{c2}p{K}^{-}$
• Exotic pentaquark states with the $qqQQ\bar{Q}$ configuration
• Pentaquarks and strange tetraquark mesons
• First observation of the decay ${\Lambda }_b^0\to {\eta }_c(1S)p{K}^{-}$
• Pentaquark states with hidden charm