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RQMD: p+C γ X at T=5.13 GeV 2-arms FLINT at 300 cm. S.Kiselev, ITEP. Input info. RQMD4.12 generator 10 6 min. bias (b<R C =2.5 fm) p+C events as at T= 5.13 GeV
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RQMD: p+C γ X at T=5.13 GeV 2-arms FLINT at 300 cm S.Kiselev, ITEP ITEP meeting S.Kiselev
Input info • RQMD4.12 generator • 106 min. bias (b<RC =2.5 fm) p+C events as at T=5.13 GeV • Two arms FLINT: 80x80 cm2 at 300 cmfrom the target, arm centers: (X,Y)=(45,0) and (=-45,0) θ = 10 - 160 • Only γ from π0 will be analyzed • Low momentum cut: 400 MeV/c. • Energy resolution: 6%/√E • Space resolution: cell size 10x10 cm2 momentum is matched to the center of a cell • Trigger: pγ> 0.4 GeV/c, i.e. without a trigger ITEP meeting S.Kiselev
γ multiplicity 1 arm 2 arms 2 arms ~ 2 times larger events with photons ITEP meeting S.Kiselev
π0 spectra 1 arm 2 arms 2 arms ~3 times larger π0 larger p and smaller θ ITEP meeting S.Kiselev
ΔRγγ from π0 vs P 1 arm 2 arms 2 arms a bit larger ΔR ITEP meeting S.Kiselev
pt dependence 1 arms No pt dependence of the Mγγ width ↓ ~ 2 times ↓~ 4 times 2 arms pairs of photons from different arms have mainly low pt larger background ITEP meeting S.Kiselev
2 arms • pairs of photons • from different arms ITEP meeting S.Kiselev
Summary • 106 RQMD p+C events at T=5.14 GeV • two arm FLINT at 300 cm • 2 arms ~2 times larger events with γ • 2 arms ~3 times larger number of π0 • No pt dependence of the Mγγ width • 2 arms pairs of photons from different arms have mainly low pt • 2 arms larger background, but still small S/(S+B) ~ 84% ITEP meeting S.Kiselev