π^0 π^0 Production in Proton-Proton Collisions at Tp=1.4 GeV

Abstract

The reaction pp->pppi0pi0 has been investigated at a beam energy of 1.4 GeV using the WASA-at-COSY facility. The total cross section is found to be (324 +- 21_systematic +- 58_normalization) mub. In order to to study the production mechanism, differential kinematical distributions have been evaluated. The differential distributions indicate that both initial state protons are excited into intermediate Delta(1232) resonances, each decaying into a proton and a single pion, thereby producing the pion pair in the final state. No significant contribution of the Roper resonance N*(1440) via its decay into a proton and two pions is found

Submitted to PLB

References in corpus (8)

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• Measurement of the $np\to np{\pi }^0{\pi }^0$ Reaction in Search for the Recently Observed $d^{\ast }(2380)$ Resonance
• System Size and Energy Dependence of Dilepton Production in Heavy-Ion Collisions at SIS Energies
• ABC Effect and Resonance Structure in the Double-Pionic Fusion to ${}^3$He
• ABC Resonance Structure in the Double-Pionic Fusion to 4He
• Study of the quasi-free $np\to np{\pi }^{+}{\pi }^{-}$ reaction with a deuterium beam at 1.25 GeV/nucleon
• On a Possible Explanation of the DLS-Puzzle
• Measurement of the $\vec{n}p\to d{\pi }^0{\pi }^0$ Reaction with Polarized Beam in the Region of the $d^{\ast }(2380)$ Resonance
• Nature of $\mathbf{S}$-wave $\mathbf{NN}$ interaction and dibaryon production at nucleonic resonance thresholds
• An Isotensor Dibaryon in the $pp\to pp{\pi }^{+}{\pi }^{-}$ Reaction?
• From CELSIUS to COSY: on the observation of a dibaryon resonance
• On the Production of an Isotensor Dibaryon in the $pp\to pp{\pi }^{+}{\pi }^{-}$ Reaction
• Dibaryons at COSY