Exotic hadron spectroscopy at the LHCb experiment

Abstract

The LHCb experiment is designed to study the decays and properties of heavy flavoured hadrons produced in the forward region from proton-proton collisions at the CERN Large Hadron Collider. During Run 1, it has recorded the world's largest data sample of beauty and charm hadrons, enabling precise studies into the spectroscopy of such particles, including discoveries of new states and measurements of their masses, widths and quantum numbers. An overview of recent LHCb results in the area of exotic hadron spectroscopy is presented, focussing on the discovery of the first pentaquark states in the ${\Lambda }_b^0\to J/\psi p{K}^{-}$ channel and a search for them in the related ${\Lambda }_b^0\to J/\psi p{\pi }^{-}$ mode. The LHCb non-confirmation of the D0 tetraquark candidate in the $B_s^0{\pi }^{+}$ invariant mass spectrum is presented.

arXiv comment4 pages, 8 figures, proceedings for Rencontres de Blois 2016

References in corpus (9)

• Observation of $J/\psi p$ resonances consistent with pentaquark states in ${\Lambda }_b^0\to J/\psi K^{-}p$ decays
• Observation of a new charged charmoniumlike state in B -> J/psi K pi decays
• Search for the Z(4430)^- at BABAR
• Evidence for a $B_s^0{\pi }^{\pm }$ State
• Model-independent evidence for $J/\psi p$ contributions to ${\Lambda }_b^0\to J/\psi p{K}^{-}$ decays
• Evidence for exotic hadron contributions to ${\Lambda }_b^0\to J/\psi p{\pi }^{-}$ decays
• Search for structure in the $B_s^0{\pi }^{\pm }$ invariant mass spectrum
• A hidden-charm pentaquark state in ${\Lambda }_b^0\to J/\psi p{\pi }^{-}$ decay
• Bottom Baryon Decays to Pseudoscalar Meson and Pentaquark