Photoproduction of the Theta^+ resonance on the nucleon in a Regge model

Abstract

We estimate the reaction mechanisms for the photoproduction of the Theta^+(1540) resonance on the nucleon, through K and K^* Regge exchanges. We compare the size of the cross sections for the gamma n -> K^- Theta^+ and gamma p -> K^0 bar Theta^+ reactions, and investigate their sensitivity to the spin-parity assignments J^P = 1/2^\pm, 3/2^\pm for the Theta^+ resonance. The model allows to estimate the cross sections corresponding with a given upper bound on the width of the Theta^+. Within this model, the cross sections on the neutron are found to be around a factor 5 larger than the ones on the proton, due to the presence of charged K exchange for the reaction on a neutron target. Furthermore, the photon asymmetry is found to display a pronounced sensitivity to the parity of the Theta^+, making it a very promising observable to help determining the quantum numbers of the Theta^+ resonance.

arXiv comment29 pages, 15 figures. A few corrections in introduction and acknowledgment, typo corrections and added reference

References in corpus (50)

• Evidence for Narrow S=+1 Baryon Resonance in Photo-production from Neutron
• Diquarks and Exotic Spectroscopy
• Exotic Anti-Decuplet of Baryons: Prediction from Chiral Solitons
• Observation of an Exotic $S=+1$ Baryon in Exclusive Photoproduction from the Deuteron
• Observation of a baryon resonance with positive strangeness in K+ collisions with Xe nuclei
• 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
• Evidence for a narrow baryonic state decaying to K0s-p and K0s-pbar in deep inelastic scattering at HERA
• 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 formation of a narrow pKshort resonance with mass near 1533 MeV in neutrino interactions
• Experimental Limits on the Width of the Reported Theta(1540)+
• Stable $uudd\bar{s}$ pentaquarks in the constituent quark model
• Search for the Pentaquark State in $\psi (2S)$ and $J/\psi$ Decays to $K_S^{0}p{K}^{-}\bar{n}$ and $K_S^0\bar{p}{K}^{+}n$
• Pentaquark in the Skyrme Model
• Experimental Search for Pentaquarks
• Phenomenology of the Pentaquark Antidecuplet
• Z^* Resonances: Phenomenology and Models
• Interpretation of the Theta+ as an isotensor pentaquark with weakly decaying partners
• Radial excitations of low--lying baryons and the $Z^{+}$ penta--quark
• Limits for the central production of Theta^+ and Xi^{--} pentaquarks in 920 GeV pA collisions
• Pentaquark states in a chiral potential
• Exotic baryon states in topological soliton models
• Chiral soliton models, large N_c consistency and the Theta^+ exotic baryon
• Search for Theta(1540)^+ in exclusive proton-induced reaction p+C(N) \to Theta^+ \bar{K}^0 + C(N) at the energy of 70 GeV
• Search for the ${\bar{\Theta }}^{-}\to$ K${}^{-}$ $\bar{n}$ with PHENIX
• Photoproduction of Theta baryon from the neutron
• Exotic Theta^+ baryon production induced by a photon and a pion
• Positive Parity Pentaquarks Pragmatically Predicted
• 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
• Electroproduction of strangeness above the resonance region
• Pentaquark Searches at CDF
• A Naturally Narrow Positive Parity Theta^+
• Exclusive electromagnetic production of strangeness on the nucleon : review of recent data in a Regge approach
• The $J=3/2$ ${\Theta }^{\ast }$ partner to the $\Theta (1540)$ baryon
• Search for the exotic ${\Xi }^{--}(1860)$ Resonance in 340GeV/c ${\Sigma }^{-}$-Nucleus Interactions
• Determination of the ${\Theta }^{+}$ parity from $\gamma n\to K^{-}{K}^{+}n$
• Study the exotic ${\Theta }^{+}$ with polarized photon beams
• Are there S=-2 Pentaquarks?
• Pentaquark Searches in Electron-Positron Annihilations and Two-Photon Collisions at LEP
• Double polarization asymmetry as a possible filter for ${\Theta }^{+}$'s parity
• Spin observables and the determination of the parity of ${\Theta }^{+}$ in photoproduction reactions
• Photoproduction of ${\Theta }^{+}$ and other pentaquark states
• Probing the partonic structure of pentaquarks in hard electroproduction
• A Phenomenological Lagrangian Approach to Two Kaon Photoproduction and Pentaquark Searches
• Pentaquark baryon production from photon-neuteron reactions
• Photoproduction of Pentaquark in Feynman and Regge Theories
• Production of the pentaquark ${\Theta }^{+}$ in $np$ scattering

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• An explanation why the Theta+ is seen in some experiments and not in others
• A possible explanation why the Theta+ is seen in some experiments and not in others
• Axial-vector transitions and strong decays of the baryon antidecuplet in the self-consistent SU(3) chiral quark-soliton model
• 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
• Search for ${\Theta }^{++}$ Pentaquarks in the Exclusive Reaction $\gamma p\to K^{+}{K}^{-}p$
• Pentaquark, cusp and rescattering in single kaon photoproduction off deuterium
• To see the exotic Theta^+ baryon from interference
• A Search for Sigma^0_5, N^0_5 and Theta^++ Pentaquark States
• K*-couplings for the antidecuplet excitation
• Vector and axial-vector structures of the Theta^+
• Photoproduction of the Theta^+ and its vector and axial-vector structure
• Photoproduction of Theta^+(1540,1/2^+) reexamined with new theoretical information