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Analysis report H.Yim (6/22/2006)
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2 Table of contents 1. TC cut selection region 2. Spectrum comparison after bug fixing on 1/beta - At previous, was used for 1/β. It just gave a worse resolution. - Now, is used. 3. E471 neutron momentum spectra for a comparison with present analysis. 4. neutron momentum spectra with 7 MeVee 5. neutron momentum spectra with 10 MeVee 6. neutron momentum spectra with 7 MeVee for L-arm -- L-arm have relatively good resolution than R-arm’s one as previously reported. 7. neutron momentum spectra with 7MeVee for R-arm 8. neutron momentum spectra with 10MeVee for L-arm 9. neutron momentum spectra with 10MeVee for R-arm 10. neutron momentum spectra with VcaVn cut -- VcaVn cut is applied with fast-π selection on TC. Two different region selection of VcaVn is compared on the same figure. 11. 1/β quality checking I --,, 12. 1/β quality checking II --,, 13. 1/β quality checking III --, 14. 1/β quality checking IV -- *In all neutron momentum spectra, the unit of Y-axis is counts/(10MeV/c) as same as reference figure.
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3 1. TC cut selection region on dE/dx E471 α – proton selection δ – slow pion selection ζ – fast pion selection E549 Top
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4 2. Spectrum comparison after bug fixing on 1/beta Top
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5 3. E471 neutron momentum spectra for comparison (from Suzuki-san’s thesis) Semi-inclusive proton Fast-pion Slow pion Top
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6 4. Neutron momentum spectra with 7 MeVee threshold Top
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7 5. Neutron momentum spectra with 10 MeVee threshold Top
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8 6. Neutron momentum spectra with 7 MeVee threshold (L-arm) Top
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9 7. Neutron momentum spectra with 7 MeVee threshold (R-arm) Top
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10 8. Neutron momentum spectra with 10 MeVee threshold (L-arm) Top
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11 9. Neutron momentum spectra with 10 MeVee threshold (R-arm) Top
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12 10. Neutron momentum spectra with VcaVn cut ( black line is for -25<VcaVn<-5 ) ( red line is for -60<VcaVn<-25 or -5<VcaVn<-2 ) 10 MeVee threshold 7 MeVee threshold 10 MeVee threshold Top
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13 11. 1/β quality checking I Top
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14 12. 1/β quality checking II Top Typical one in L-armTypical one in R-arm All counters show bending structure.
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15 13. 1/β quality checking III Top L-armR-arm Later part of layers should have better resolution, but left figure doesn’t show that tendency. So, performance of each layer has checked. The result is following two figures.
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16 14. 1/β quality checking IV Top
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