Experimental Search for Pentaquarks

Abstract

The experimental evidence for pentaquarks, both old an new, is discussed. Constraints due to $K^{+}N$ scattering data from previous decades is first reviewed, followed by experiments with positive evidence and those with null results. Finally, the problem of the narrow width of the Theta+ pentaquark is discussed, along with theoretical implications.

Review article for Progress in Particle and Nuclear Physics (34 pages)

References in corpus (27)

• Evidence for Narrow S=+1 Baryon Resonance in Photo-production from Neutron
• Diquarks and Exotic Spectroscopy
• Evidence for the positive-strangeness pentaquark ${\Theta }^{+}$ in photoproduction with the SAPHIR detector at ELSA
• Observation of an Exotic S = -2, Q = -2 Baryon Resonance in Proton-Proton Collisions at the CERN SPS
• Observation of an Exotic Baryon with S=+1 in Photoproduction from the Proton
• Evidence for a narrow |S|=1 baryon state at a mass of 1528 MeV in quasi-real photoproduction
• A Diquark-Triquark Model for the KN Pentaquark
• Evidence for a narrow resonance at 1530 MeV/c2 in the K0 p - system of the reaction pp --> Sigma+ K0 p from the COSY-TOF experiment
• Evidence for a Narrow Anti-Charmed Baryon State
• K+ nucleon scattering and exotic S=+1 Baryons
• Experimental Limits on the Width of the Reported Theta(1540)+
• Search for the Pentaquark State in $\psi (2S)$ and $J/\psi$ Decays to $K_S^{0}p{K}^{-}\bar{n}$ and $K_S^0\bar{p}{K}^{+}n$
• A study of pentaquarks on the lattice with overlap fermions
• Influence of a Z+(1540) resonance on K+N scattering
• Limits for the central production of Theta^+ and Xi^{--} pentaquarks in 920 GeV pA collisions
• New results on the limit for the width of the exotic Theta^+ resonance
• The Evidence for a Pentaquark Signal and Kinematic Reflections
• Exotic Theta^+ baryon production induced by a photon and a pion
• The pentaquark in K-plus-d total cross section data
• Cross sections for pentaquark baryon production from protons in reactions induced by hadrons and photons
• High Statistics Search for the Theta+(1.54) Pentaquark State
• Search for a narrow charmed baryonic state decaying to D^*+/- p^-/+ in ep collisions at HERA
• Search for the exotic ${\Xi }^{--}(1860)$ Resonance in 340GeV/c ${\Sigma }^{-}$-Nucleus Interactions
• The narrow width of the Θ^+ - a possible explanation
• Comment on the ${\Theta }^{+}$-production at high energy
• Resonances, and mechanisms of Theta-production
• Comment on The Evidence for a Pentaquark and Kinematic Reflections

Cited by in corpus (64)

• Baryon spectroscopy
• Identifying exotic hidden-charm pentaquarks
• Progress Toward Understanding Baryon Resonances
• New Hadron States
• Photoproduction of Baryons Decaying into N pi and N eta
• Search for the ${\Theta }^{+}$ pentaquark in the reaction $\gamma d\to p{K}^{-}{K}^{+}n$
• The $N^{\ast }(1710)$ as a resonance in the $\pi \pi N$ system
• The Hadronic Final State at HERA
• Study of exotic hadrons in S-wave scatterings induced by chiral interaction in the flavor symmetric limit
• Search for the ${\Theta }^{+}$ pentaquark via the ${\pi }^{-}p\to K^{-}X$ reaction at 1.92 GeV/$c$
• Coherent Theta^+ and Lambda(1520) photoproduction off the deuteron
• Color Non-Singlet Spectroscopy
• Search for the Theta(1540)+ pentaquark using kaon secondary interactions at Belle
• Improvement of the Theta+ width estimation method on the Light Cone
• Observation of a narrow structure in p(gamma,K_s)X via interference with phi-meson production
• A novel interpretation of the "${\Theta }^{+}(1540)$ pentaquark" peak
• Search for Theta+ via K+p -> pi+X reaction with a 1.2 GeV/c K+ beam
• Spin 3/2 Pentaquark Resonance Signature in Lattice QCD
• Spin 3/2 Penta-quarks in anisotropic lattice QCD
• Search for a Narrow Baryonic Resonance Decaying to $K_s^{0}p$ or $K_s^0\bar{p}$ in Deep Inelastic Scattering at HERA
• High-resolution search for the ${\Theta }^{+}$ pentaquark via a pion-induced reaction at J-PARC
• QCD sum rules for the anti-charmed pentaquark
• Study of the $\gamma d\to K^{+}{K}^{-}np$ reaction and an alternative explanation for the "${\Theta }^{+}(1540)$ pentaquark" peak
• Testing the nature of the $\Lambda (1520)$ resonance in proton-induced production
• A QCD sum rule analysis of the pentaquark
• Axial-vector transitions and strong decays of the baryon antidecuplet in the self-consistent SU(3) chiral quark-soliton model
• Pentaquark state in pole-dominated QCD sum rules
• Theta+ formation in inclusive gamma D -> pK- X
• Vector transition form factors of the $N{K}^{\ast }\to {\Theta }^{+}$ and $N{\bar{K}}^{\ast }\to {\Sigma }_{\overline{10}}^{\ast -}$ in the SU(3) chiral quark-soliton model
• Quark spin content of the proton, hyperon semileptonic decays, and the decay width of the ${\Theta }^{+}$ pentaquark
• Photoproduction of the Theta^+ resonance on the nucleon in a Regge model
• Searching for exotic states in the $N\pi K$ system
• A Search for Sigma^0_5, N^0_5 and Theta^++ Pentaquark States
• Search for Baryonic Resonances Decaying to Xi pi in Deep-Inelastic Scattering at HERA
• Anti-charmed pentaquark from B decays
• Phenomenological study of two-meson couplings of Theta+
• Regge Trajectories of Exotic Hadrons in the Flux Tube Model
• Production of pentaquarks in $pA$-collisions
• Spin-3/2 Pentaquark in QCD Sum Rules
• Baryon Spectrum in Large N(C) Chiral Soliton and in Quark Models
• Systematic study of pentaquark states: $qqq-q\bar{q}$ configuration
• Search for Pentaquarks in the Hadronic Decays of the Z Boson with the DELPHI Detector at LEP
• Investigate the pentaquark resonance in the $NK$ system
• Electric properties of the baryon anti-decuplet in the SU(3) chiral quark-soliton model
• Upper limits for the photoproduction cross section for the Phi--(1860) pentaquark state off the deuteron
• Micro-canonical pentaquark production in $\ee$ annihilations
• Search for a narrow baryonic state decaying to $p{K}_S^0$ and $\bar{p}{K}_S^0$ in deep inelastic scattering at HERA
• Testing the bootstrap constraints in the strange sector
• Exploration of charmed pentaquarks
• N K Pi molecular state with I=1 and J(Pi)=3/2-
• Vector and axial-vector structures of the Theta^+
• Multimodal Fragmentation of All-Heavy Pentaquarks: Uncertainty-Aware Predictions for Hadron Colliders
• Pentaquark Theta^+ production via gamma N ->K^*bar Theta^+(3/2^(+-))
• Prediction of the masses and decay processes of strange, charmed and bottomed pentaquarks from the linear molecular crypto-heptaquark model
• Structure and decay width of Θ^+ in a one-gluon exchange model
• Search for an exotic S=-2, Q=-2 baryon resonance in proton-proton interactions at $\sqrt{s_{NN}}$ = 17.3 GeV
• Photoproduction of the Theta^+ and its vector and axial-vector structure
• Stability of the rotating SU(3) Skyrmion
• Search for the S=+1 pentaquarks in quenched lattice QCD
• Photoproduction of Theta^+(1540,1/2^+) reexamined with new theoretical information
• Spectroscopy of Pentaquark Baryons
• Pentaquarks in Chiral Soliton Models; notes and discussion
• Heavy-flavor multimodal fragmentation to $S$-wave pentacharms at next-generation hadron colliders
• Baryon Spectroscopy and the Constituent Quark Model