Comparison between ūu and d̄d productions by the γp → π{sup −}Δ{sup ++} and π{sup +}Δ{sup 0} reactions at forward π angles at E{sub γ} = 1.5–3.0 GeV
Journal Article
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· Physics of Particles and Nuclei
Photoproduction reactions are dominated by isospin rules. In the case of πΔ photoproduction on the proton at forward π angles, the exchange of isospin = 1 meson(π or ρ) in the t-channel is the most dominant reaction mechanism, which is considered to give a cross section ratio σ(π{sup +}Δ{sup 0})/σ(π{sup −}Δ{sup ++}) of 1/3. The cross section ratio has not been measured precisely experimentally. We present preliminary results for the cross section ratio at E{sub γ} = 1.5–3.0 GeV. Larger ratios than 1/3 measured by our experiment at LEPS/SPring-8 suggest that the d̄d productions are enhanced compared with the ūu productions in the photoproduction reactions on the proton.
- OSTI ID:
- 22979510
- Journal Information:
- Physics of Particles and Nuclei, Journal Name: Physics of Particles and Nuclei Journal Issue: 1 Vol. 48; ISSN 1063-7796
- Country of Publication:
- United States
- Language:
- English
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