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Fig 1: The lambda correction factors obtained in this analysis without TOF cuts, compared with those obtained in Sean's earlier DDC lambda analysis. While the operating systems, analysis shell, and algorithms used in the two acceptance calculations differ, we find excellent agreement between the present and previous correction factors in all rapidity bins.
Fig 2: These plots compare the lambda correction factors including TOF cuts and corrections with those obtained without the TOF cuts. For lower rapidities, and at lower pT, introducing the TOF cuts and corrections tends to reduce the correction factors. This shows that the TOF-identified backgrounds to the lambdas reconstructed in E896 are most prominent at the lowest rapidities in the acceptance.
Fig 3: The correction factors (TOF cuts and corrections included) for lambda and Ks in the regions of (y,pT) where the DDC+TOF acceptances overlap.
Fig 4: A plot of the differential yield versus transverse mass for corrected lambdas in E896, without TOF cuts. The markers represent the data from this analysis; the solid lines denote the Boltzmann fit results. The dotted lines represent the fits to the produced lambda distribution from the analysis described in Sean's Thesis. Error bars reflect a 20 percent ``bin-leakage'' systemmatic error; statistical errors are smaller than the marker size.
Fig 5: Plots of the lambda differential yields versus transverse mass for produced lambdas in this analysis, with TOF cuts (markers and solid lines) and without TOF cuts (dotted lines). TOF's removal of background at lower rapidities is evident in this plot.
Fig 6: For this plot of lambda differential yield versus transverse mass, the markers and solid lines represent corrected lambda spectra obtained using TOF cuts and corrections. The dotted lines are the fits to the lambda spectra from RQMD, b < 4 fm.
Fig 7: A comparison of the Ks transverse mass spectra obtained from this analysis with TOF cuts included (markers and solid lines), and from RQMD (dotted lines).
Fig 8: Transverse mass spectra for lambdas, TOF cuts included, for four different rapidity bins. For each rapidity bin, the fit is performed over the mT range covered by the DDC+TOF detector acceptance.
Fig 9: Transverse mass spectra for lambdas from RQMD, b < 4 fm, for four different rapidity bins. For the two highest rapidity bins (lower frames), the temperatures agree well with those obtained from the E896 TOF analysis (Fig 8).
Fig 10: A plot of the lambda inverse slope parameter versus rapidity, for the E896 TOF-cut data, RQMD, E891, E877, and the E896 SDDA data. E896 TOF's acceptance in rapidity overlaps with E891 and E877; at these higher rapidities, the trends in inverse slope parameter with rapidity are in reasonable agreement.
Fig 11: The transverse mass plots and Boltzmann fits for Ks obtained from the E896 TOF analysis.
Fig 12: The transverse mass plots and Boltzmann fits for Ks obtained from RQMD, b < 4 fm.
Fig 13: A plot of the Ks inverse slope parameter versus rapidity, for Ks from the E896 TOF analysis and from RQMD.
Fig 14: A plot of the ``intercept parameter'' (the point on the mT - m0 = 0 axis crossed by the fitted Boltzmann curve) versus rapidity, for lambdas from the E896 TOF analysis and from RQMD.
For Figures 15 and 16 below, E896 TOF lambda intercept parameters, to compare with the intercepts reported by E891 and E877, were obtained in the following manner. The transverse mass spectra for E896 TOF lambdas were re-plotted using the same vertical-axis definition as was used for the E891 or E877 plot. The fit function that was used in the E891 or E877 distribution was then applied to the re-plotted E896 TOF lambda distribution, and the intercept was determined.
Fig 15: A plot of the intercept parameter versus rapidity, for lambdas from the E896 TOF analysis and from E891.
Fig 16: A plot of the intercept parameter versus rapidity, for lambdas from the E896 TOF analysis and from E877. The error bars for the E896 TOF intercepts are smaller than the marker size.
Fig 17: The intercept parameter versus rapidity for Ks from the E896 TOF analysis and from RQMD.