Production of pentaquarks in $pA$-collisions

Abstract

We argue that a hidden-charm pentaquark recently observed in weak decays of ${\Lambda }_b$ can be produced in proton-nucleus collisions without electroweak intermediaries. We analyze the production cross-section for several scenarios of internal structure and find that a cross-section is sizable. This process can be studied both in collider as well as in fixed-target experiments. In the former case, the pentaquarks are produced at very forward rapidities, whereas in the latter case, pentaquarks are produced with relatively small rapidities and can be easily detected via invariant mass distribution of a forward $J/\psi$ and a comoving proton. Additionally, the suggested process allows to check the existence of a neutral pentaquark $P_c^0$ (an isospin partner of $P_c^{+}$) predicted in several models. The rapidity and transverse momentum distributions of pentaquarks could provide comprehensive information about the $\bar{c}c$ component of this exotic baryon.

15 pages, 8 Figures

References in corpus (14)

• Heavy quarkonium: progress, puzzles, and opportunities
• Momentum sharing in imbalanced Fermi systems
• Evidence for the Strong Dominance of Proton-Neutron Correlations in Nuclei
• Analysis of combined HERA data in the Impact-Parameter dependent Saturation model
• New limits on intrinsic charm in the nucleon from global analysis of parton distributions
• Narrow Nucleon-$\psi (2S)$ Bound State and LHCb Pentaquarks
• Issues and Opportunities in Exotic Hadrons
• Measurement of the ratio of prompt ${\chi }_c$ to $J/\psi$ production in $pp$ collisions at $\sqrt{s}=7$ TeV
• Quarkonium Physics at a Fixed-Target Experiment using the LHC Beams
• Inclusive production of $J/\psi$ meson in proton-proton collisions at BNL RHIC
• Improvement of the Theta+ width estimation method on the Light Cone
• Strong decay patterns of the hidden-charm pentaquark states $P_c(4380)$ and $P_c(4450)$
• Nucleon-nucleon momentum correlation function as a probe of the density distribution of valence neutron in neutron-rich nucleus
• Effects of Ground-State Correlations on High Energy Scattering off Nuclei: the Case of the Total Neutron-Nucleus Cross Section

Cited by in corpus (6)

• Pentaquark and Tetraquark states
• Remarks on the $P_c$ structures and triangle singularities
• Coupled channel analysis of molecule picture of $P_c(4380)$
• Hidden-charm pentaquarks and their hidden-bottom and $B_c$-like partner states
• A Fixed-Target Programme at the LHC: Physics Case and Projected Performances for Heavy-Ion, Hadron, Spin and Astroparticle Studies
• Hidden-charm Pentaquark Production at $e^{+}{e}^{-}$ Colliders