Exotic Hadrons
Measurement of $\chi_{c1}(3872)$ production in proton-proton collisions at $\sqrt{s} = 8$ and 13 TeV
R. Aaij et al. (the LHCb collaboration), 16/09/2021. LHCb-PAPER-2021-026. arXiv:2109.07360 [hep-ex]. JHEP 01 (2022) 131.Observation of $J/\psi p$ resonances consistent with pentaquark states in $\Lambda_b^0\to J/\psi pK^-$ decays
R. Aaij et al. (the LHCb collaboration), 13/07/2015. LHCb-PAPER-2015-029. arXiv:1507.03414 [hep-ex]. Phys. Rev. Lett. 115 (2015) 072001.Observation of the $\Lambda_b^0 \to J/\psi p \pi^-$ decay
R. Aaij et al. (the LHCb collaboration), 03/06/2014. LHCb-PAPER-2014-020. arXiv:1406.0755 [hep-ex]. JHEP 07 (2014) 103.