Interference effect between $\varphi$ and $\Lambda (1520)$ production channels in the $\gamma p\to K^{+}{K}^{-}p$ reaction near threshold

Abstract

The $\varphi$-$\Lambda (1520)$ interference effect in the $\gamma p\to K^{+}{K}^{-}p$ reaction has been measured for the first time in the energy range from 1.673 to 2.173 GeV. The relative phases between $\varphi$ and $\Lambda (1520)$ production amplitudes were obtained in the kinematic region where the two resonances overlap. The measurement results support strong constructive interference when $K^{+}{K}^{-}$ pairs are observed at forward angles, but destructive interference for proton emission at forward angles. Furthermore, the observed interference effect does not account for the $\sqrt{s}=2.1$ GeV bump structure in forward differential cross sections for $\varphi$ photoproduction. This fact suggests possible exotic structures such as a hidden-strangeness pentaquark state, a new Pomeron exchange and rescattering processes via other hyperon states.

References in corpus (15)

• Big-Bang Nucleosynthesis
• Observation of $J/\psi p$ resonances consistent with pentaquark states in ${\Lambda }_b^0\to J/\psi K^{-}p$ decays
• Diffractive $\varphi$-meson photoproduction on proton near threshold
• Photoproduction of Vector Mesons at Large Transfer
• Data analysis techniques, differential cross sections, and spin density matrix elements for the reaction $\gamma p\to \varphi p$
• Phi-meson photoproduction from nuclei
• Near-threshold Lambda(1520) production by the gamma p -> K+Lambda(1520) reaction at forward K+ angles
• Development of High Intensity Laser-Electron Photon Beams up to 2.9 GeV at the SPring-8 LEPS Beamline
• $\varphi$-meson photoproduction on Hydrogen in the neutral decay mode
• $\varphi$ photoprodution with coupled-channel effects
• Is the nonmonotonic behavior in the cross section of phi photoproduction near threshold a signature of a resonance?
• Measurement of Spin-Density Matrix Elements for $\varphi$-Meson Photoproduction from Protons and Deuterons Near Threshold
• Vector Meson Dominance
• A coupled-channel analysis for phi-photoproduction with Lambda(1520)
• Quantum interference of particles and resonances

Cited by in corpus (8)

• $\varphi$ meson self-energy in nuclear matter from $\varphi N$ resonant interactions
• Photoproduction of $\Lambda (1405)$ with the $N^{\ast }$ and $t$-channel Regge contributions
• $\varphi$ meson transparency in nuclei from $\varphi N$ resonant interactions
• First measurement of coherent $\varphi$-meson photoproduction from helium-4 near threshold
• $\varphi$ photoproduction on the proton at $E_{\gamma }$ = 1.5 - 2.9 GeV
• Pomeron, nucleon-resonance, and $(0^{+},0^{-},1^{+})$-meson contributions in $\varphi$-meson photoproduction
• Monitoring the build-up of hydrogen polarization for polarized Hydrogen-Deuteride (HD) targets with NMR at 17 Tesla
• Studies on photo- and electro-productions of $\Lambda (1405)$ via ${\gamma }^{(\ast )}p\to K^{\ast +}{\pi }^0{\Sigma }^0$