First measurement of coherent double neutral-pion photoproduction on the deuteron at incident energies below 0.9 GeV

Abstract

The total cross sections were measured for coherent double neutral-pion photoproduction on the deuteron at incident energies below 0.9 GeV for the first time. No clear resonance-like behavior is observed in the excitation function for $W_{\gamma d}=2.38$--2.61 GeV, where the $d^{\ast }(2380)$ dibaryon resonance observed at COSY is expected to appear. The measured excitation function is consistent with the existing theoretical calculation for this reaction. The upper limit of the total cross section is found to be $0.034$~$\mu$b for the dibaryon resonance at $W_{\gamma d}=2.37$~GeV (90\% confidence level) in the $\gamma d\to {\pi }^0{\pi }^{0}d$ reaction.

arXiv commentsubmitted to Physics Letters B

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Cited by in corpus (14)

• Non-strange Dibaryon Resonances Observed in the $\gamma d\to {\pi }^0{\pi }^{0}d$ Reaction
• The $d^{\ast }(2380)$ in neutron stars - a new degree of freedom?
• Dibaryons: Molecular versus Compact Hexaquarks
• Deuteron photodisintegration by polarized photons in the region of the $d^{\ast }(2380)$
• Evidence of a dibaryon spectrum in coherent ${\pi }^0{\pi }^{0}d$ photoproduction at forward deuteron angles
• $\omega N$ scattering length from $\omega$ photoproduction on the proton near the threshold
• Resonance-like structure near the $\eta d$ threshold in the $\gamma d${$\to$}${\pi }^0\eta d$ reaction
• Sequential single pion production explaining the dibaryon "$d^{\ast }(2380)$" peak
• Reply to "Comment on Sequential Single-pion Production Explaining the dibaryon $d^{\ast }(2380)$ peak''
• Photo-absorption on deuteron contributed by d^*(2380) resonance
• Differential Cross Sections for Neutron-Proton Scattering in the Region of the $d^{\ast }(2380)$ Dibaryon Resonance
• Coherent photoproduction of the neutral pion and eta meson on the deuteron at incident energies below 1.15 GeV
• Possible dibaryon production at $\bar{\mathrm{P}}$anda with a Lagrangian approach
• Structure and Width of the d*(2380) Dibaryon