To see the exotic Theta^+ baryon from interference

Abstract

Since all couplings of the exotic ${\Theta }^{+}$ baryon to normal hadrons seem to be small it is hard to reveal it in standard resonance searching. We suggest to look for the ${\Theta }^{+}$ production in interference with a known resonance yielding the same final state but having a high production rate. The interference process is linear in the ${\Theta }^{+}$ couplings whereas the non-interference process is quadratic. That gives an obvious gain if the couplings are small. Moreover, employing the peculiar oscillating nature of the interference processes one can reduce considerably the parasitic background and determine the ${\Theta }^{+}$ resonance parameters.

9 pages

References in corpus (27)

• Evidence for Narrow S=+1 Baryon Resonance in Photo-production from Neutron
• Exotic Anti-Decuplet of Baryons: Prediction from Chiral Solitons
• Observation of a baryon resonance with positive strangeness in K+ collisions with Xe nuclei
• K+ nucleon scattering and exotic S=+1 Baryons
• Diffractive $\varphi$-meson photoproduction on proton near threshold
• Experimental Limits on the Width of the Reported Theta(1540)+
• Search for the ${\Theta }^{+}$ pentaquark in the reaction $\gamma d\to p{K}^{-}{K}^{+}n$
• On photoexcitation of baryon antidecuplet
• New results on the limit for the width of the exotic Theta^+ resonance
• Search for the ${\Theta }^{+}$ pentaquark in the reactions $\gamma p\to {\bar{K}}^0{K}^{+}n$ and $\gamma p\to {\bar{K}}^0{K}^{0}p$
• Further evidence for formation of a narrow baryon resonance with positive strangeness in K+ collisions with Xe nuclei
• Extraction of radiative decay width for the non-strange partner of Theta^+
• Exotic and nonexotic magnetic transitions in the context of the SELEX and GRAAL experiments
• Search for the Theta+ pentaquark in the gamma d -> Lambda n K+ reaction measured with CLAS
• Bound State versus Collective Coordinate Approaches in Chiral Soliton Models and the Width of the ${\Theta }^{+}$ Pentaquark
• Coherent Theta^+ and Lambda(1520) photoproduction off the deuteron
• Improvement of the Theta+ width estimation method on the Light Cone
• Estimate of the Theta+ width in the Relativistic Mean Field Approximation
• SU(3) Baryon Resonance Multiplets in Large N_c QCD
• 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
• Theta+ formation in inclusive gamma D -> pK- X
• Photoproduction of the Theta^+ resonance on the nucleon in a Regge model
• Production of Theta+ in gamma + D -> Lambda + Theta+ and gamma + D -> Sigma + Theta+ reactions
• Axial current matrix elements and pentaquark decay widths in chiral soliton models
• K*-couplings for the antidecuplet excitation
• Small size pentaquark width: calculation in QCD sum rules

Cited by in corpus (9)

• Observation of a narrow structure in p(gamma,K_s)X via interference with phi-meson production
• CP violation and chiral symmetry breaking in hot and dense quark matter in presence of magnetic field
• Evidence for narrow resonant structures at $W\approx 1.68$ and $W\approx 1.72$ GeV in real Compton scattering off the proton
• Quantum interference of particles and resonances
• Strong CP violation and chiral symmetry breaking in hot and dense quark matter
• On strange SU(3) partners of Theta+
• Evidence for a narrow N(1685) resonance in eta photoproduction off the nucleon
• On Narrow Nucleon Excitation N*(1685)
• Justifying the exotic Theta+ pentaquark