Is the nonmonotonic behavior in the cross section of phi photoproduction near threshold a signature of a resonance?

Abstract

We study whether the nonmonotonic behavior found in the differential cross section of the phi-meson photoproduction near threshold can be described by a resonance. Namely, we add a resonance to a model consisting of Pomeron and (pi,eta) exchange by fiat and see if, with a suitable assignment of spin and parity, mass and width, as well as the coupling constants, one would be able to obtain a good description to all the data reported by the LEPS collaboration in the low-energy region. The resonant contribution is evaluated by using an effective Lagrangian approach. We find that, with the assumption of a J^P=3/2^- resonance with mass of 2.10 +- 0.03 GeV and width of 0.465 +- 0.141 GeV, LEPS data can indeed be well described. The ratio of the helicity amplitudes A_(1/2)/A_(3/2) calculated from the resulting coupling constants differs in sign from that of the known D13(2080). We further find that the addition of this postulated resonance can substantially improve the agreement between the existing theoretical predictions and the recent omega photoproduction data if a large value of the OZI evading parameter x_OZI = 12 is assumed for the resonance.

References in corpus (22)

• Quasi-Two-Body Decays of Nonstrange Baryons
• Electromagnetic excitation of the Delta(1232)-resonance
• Photon- and meson-induced reactions on the nucleon
• Vector meson production and nucleon resonance analysis in a coupled-channel approach for energies m_N < sqrt(s) < 2 GeV I: pion-induced results and hadronic parameters
• A unitary model for meson-nucleon scattering
• Vector meson production and nucleon resonance analysis in a coupled-channel approach for energies m_N < sqrt(s) < 2 GeV II: photon-induced results
• Diffractive $\varphi$-meson photoproduction on proton near threshold
• A coupled-channel analysis of $K\Lambda$ production in the nucleon resonance region
• Nucleon resonances in omega photoproduction
• Photoproduction of phi(1020) mesons on the proton at large momentum transfer
• Differential cross sections and spin density matrix elements for the reaction gamma p -> p omega
• Photoproduction of phi mesons from the proton: Polarization observables and strangeness in the nucleon
• Polarization Observables in Phi Meson Photoproduction and the Strangeness Content of the Proton
• Spin effects and baryon resonance dynamics in phi-meson photoproduction at few GeV
• Magnetic dipole moment of the S11(1535) from the γp \to γηp reaction
• Electromagnetic Couplings of Nucleon Resonances
• A coupled-channel analysis for phi-photoproduction with Lambda(1520)
• Nucleonic resonance effects in the $\varphi$ meson photoproduction
• Photoproduction of phi meson off deuteron near threshold
• Non-diffractive mechanisms in the $\varphi$ meson photoproduction on nucleons
• Asymmetries in phi photoproduction and the OZI violation
• Probing nucleon strangeness in phi electroproduction

Cited by in corpus (20)

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• Nucleon resonances $N(1875)$ and $N(2100)$ as strange partners of LHCb pentaquarks
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• Triangular singularity and a possible $\varphi p$ resonance in the ${\Lambda }_c^{+}\to {\pi }^0\varphi p$ decay
• $\varphi$ photoprodution with coupled-channel effects
• Photoproduction of hidden-bottom pentaquark and related topics
• Measurement of Spin-Density Matrix Elements for $\varphi$-Meson Photoproduction from Protons and Deuterons Near Threshold
• Decay behavior of the strange and beauty partners of $P_c$ hadronic molecules
• On the near-threshold peak structure in the differential cross section of ϕ-meson photoproduction: indication of a missing resonance with non-negligible strangeness content
• Interference effect between $\varphi$ and $\Lambda (1520)$ production channels in the $\gamma p\to K^{+}{K}^{-}p$ reaction near threshold
• $P_c$-like pentaquarks in hidden strange sector
• $\varphi$ photoproduction on the proton at $E_{\gamma }$ = 1.5 - 2.9 GeV
• Searching for the odderon in $pp\to pp{K}^{+}{K}^{-}$ and $pp\to pp{\mu }^{+}{\mu }^{-}$ reactions in the $\varphi (1020)$ resonance region at the LHC
• Photo- and electro-production of narrow exotic states: from light quarks to charm and up to bottom
• Pomeron, nucleon-resonance, and $(0^{+},0^{-},1^{+})$-meson contributions in $\varphi$-meson photoproduction
• On the near-threshold incoherent $\varphi$ photoproduction on the deuteron: any trace of a resonance?
• Decay patterns of low-lying $N_{s\bar{s}}$ states to the strangeness channels
• Studies on the $K^{\ast }\Sigma$ bound-state via $K^{+}p\to K^{+}\varphi p$
• Incoherent photoproduction of $\varphi$-meson from deuteron at low energies
• $\varphi N$ photoproduction coupled with the $K{\Lambda }^{\ast }$ channel