Difference between revisions of "Mattione Kaon PID Studies phi3(1850)"
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(→Mass Peaks & Kinematic Fitting) |
(→Yield %'s & Signal / Background Ratios) |
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* The analysis (cuts/histing/kinfits) is then performed on each possible track combination (events are only cut if every one of their track combinations is cut): | * The analysis (cuts/histing/kinfits) is then performed on each possible track combination (events are only cut if every one of their track combinations is cut): | ||
** Required 45.0 < Track-Vertex-Z (cm) < 85.0 | ** Required 45.0 < Track-Vertex-Z (cm) < 85.0 | ||
+ | ** EXTREMELY loose mass cuts around each mass peak (typically at the histogram edges): saves time by reducing # of kinematic fits to perform | ||
** Require the combined FOM for PID (χ<sup>2</sup> and NDF of all tracks summed together) be > 1% | ** Require the combined FOM for PID (χ<sup>2</sup> and NDF of all tracks summed together) be > 1% | ||
− | |||
** Where kinematic fit: Require that the confidence level from the kinematic fit be > 1% | ** Where kinematic fit: Require that the confidence level from the kinematic fit be > 1% | ||
+ | ** Mass cuts as illustrated. | ||
− | == Mass Peaks & Kinematic Fitting == | + | == Mass Peaks & Kinematic Fitting : P Missing == |
− | === genr8 φ<sub>3</sub>(1850) Signal === | + | * NOTES: |
+ | ** Plots are shown for "VertexP4 KinFit" only. | ||
+ | ** Mass Plots: Pre-KinFit is Magenta, Post-KinFit is Teal | ||
+ | ** Kinematic Fit Confidence Level is zoomed in: spike at 0 confidence is well off the top of the plot | ||
+ | ** For the genr8 background, It wasn't possible to lineup every mass peak (without generating the recoil proton at a bogus mass), so the missing mass peak is a little off-center. | ||
+ | ** If a cut is shown, then all "Post-KinFit" plots after that cut include it. | ||
+ | {| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;" | ||
+ | !width="75"| Plot | ||
+ | !width="350"| genr8 φ<sub>3</sub>(1850) Signal | ||
+ | !width="350"| genr8 φ<sub>3</sub>(1850) Background | ||
+ | !width="350"| bggen Background | ||
+ | |- | ||
+ | ! Confidence Level | ||
+ | | [[Image:Mattione_Update_09132012_KinFitConLev_MissingP_VertexP4KinFit_Phi1850.png|left|350px]] || [[Image:Mattione_Update_09132012_KinFitConLev_MissingP_VertexP4KinFit_Phi1850bkgnd.png|left|350px]] || [[Image:Mattione_Update_09132012_KinFitConLev_MissingP_VertexP4KinFit_Phi1850bggen.png|left|350px]] | ||
+ | |- | ||
+ | ! Missing Mass | ||
+ | | [[Image:Mattione_Update_09132012_MissingMass_MissingP_VertexP4KinFit_Phi1850.png|left|350px]] || [[Image:Mattione_Update_09132012_MissingMass_MissingP_VertexP4KinFit_Phi1850bkgnd.png|left|350px]] || [[Image:Mattione_Update_09132012_MissingMass_MissingP_VertexP4KinFit_Phi1850bggen.png|left|350px]] | ||
+ | |- | ||
+ | ! φ<sub>3</sub>(1850) Mass | ||
+ | | [[Image:Mattione_Update_09132012_Phi1850Mass_MissingP_VertexP4KinFit_Phi1850.png|left|350px]] || [[Image:Mattione_Update_09132012_Phi1850Mass_MissingP_VertexP4KinFit_Phi1850bkgnd.png|left|350px]] || [[Image:Mattione_Update_09132012_Phi1850Mass_MissingP_VertexP4KinFit_Phi1850bggen.png|left|350px]] | ||
+ | |} | ||
+ | <br style="clear:both;"/> | ||
+ | |||
+ | == Mass Peaks & Kinematic Fitting: No Missing == | ||
+ | |||
+ | * NOTES: | ||
+ | ** Plots are shown for "VertexP4 KinFit" only. | ||
+ | ** Mass Plots: Pre-KinFit is Magenta, Post-KinFit is Teal | ||
+ | ** Kinematic Fit Confidence Level is zoomed in: spike at 0 confidence is well off the top of the plot | ||
+ | ** For the genr8 background, It wasn't possible to lineup every mass peak (without generating the recoil proton at a bogus mass), so the missing mass peak is a little off-center. | ||
+ | ** If a cut is shown, then all "Post-KinFit" plots after that cut include it. | ||
+ | {| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;" | ||
+ | !width="75"| Plot | ||
+ | !width="350"| genr8 φ<sub>3</sub>(1850) Signal | ||
+ | !width="350"| genr8 φ<sub>3</sub>(1850) Background | ||
+ | !width="350"| bggen Background | ||
+ | |- | ||
+ | ! Confidence Level | ||
+ | | [[Image:Mattione_Update_09132012_KinFitConLev_NoMissing_VertexP4KinFit_Phi1850.png|left|350px]] || [[Image:Mattione_Update_09132012_KinFitConLev_NoMissing_VertexP4KinFit_Phi1850bkgnd.png|left|350px]] || [[Image:Mattione_Update_09132012_KinFitConLev_NoMissing_VertexP4KinFit_Phi1850bggen.png|left|350px]] | ||
+ | |- | ||
+ | ! Missing Mass Squared | ||
+ | | [[Image:Mattione_Update_09132012_MissingMass_NoMissing_VertexP4KinFit_Phi1850.png|left|350px]] || [[Image:Mattione_Update_09132012_MissingMass_NoMissing_VertexP4KinFit_Phi1850bkgnd.png|left|350px]] || [[Image:Mattione_Update_09132012_MissingMass_NoMissing_VertexP4KinFit_Phi1850bggen.png|left|350px]] | ||
+ | |- | ||
+ | ! φ<sub>3</sub>(1850) Mass | ||
+ | | [[Image:Mattione_Update_09132012_Phi1850Mass_NoMissing_VertexP4KinFit_Phi1850.png|left|350px]] || [[Image:Mattione_Update_09132012_Phi1850Mass_NoMissing_VertexP4KinFit_Phi1850bkgnd.png|left|350px]] || [[Image:Mattione_Update_09132012_Phi1850Mass_NoMissing_VertexP4KinFit_Phi1850bggen.png|left|350px]] | ||
+ | |} | ||
+ | <br style="clear:both;"/> | ||
+ | |||
+ | == Cherenkov Detector Comparison == | ||
+ | |||
+ | === genr8 φ<sub>3</sub>(1850) Background === | ||
+ | |||
+ | * P vs. θ of π<sup>+</sup>'s as K<sup>+</sup> candidates ("All" means all post-analysis cuts, pre-Cherenkov cuts) | ||
+ | ** π<sup>-</sup>'s as K<sup>-</sup> not shown: identical due to symmetry. | ||
+ | ** Plots are shown for "Missing p, VertexP4 KinFit" only. | ||
+ | {| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;" | ||
+ | !width="75"| Detector | ||
+ | !width="350"| % of Pions That Fail Kaon Cut | ||
+ | !width="350"| Pions That Fail Kaon Cut | ||
+ | !width="350"| Pions That Survive Kaon Cut | ||
+ | |- | ||
+ | ! No CKOV | ||
+ | | [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_All_MissingP_VertexP4KinFit_Phi1850bkgnd.png|left|350px]] || NA || NA | ||
+ | |- | ||
+ | ! He DC | ||
+ | | 39.13% || [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_FailedHeDC_MissingP_VertexP4KinFit_Phi1850bkgnd.png|left|350px]] || [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_PassedHeDC_MissingP_VertexP4KinFit_Phi1850bkgnd.png|left|350px]] | ||
+ | |- | ||
+ | ! Gas Threshold | ||
+ | | 46.58% || [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_FailedGasThresh_MissingP_VertexP4KinFit_Phi1850bkgnd.png|left|350px]] || [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_PassedGasThresh_MissingP_VertexP4KinFit_Phi1850bkgnd.png|left|350px]] | ||
+ | |- | ||
+ | ! HBRICH | ||
+ | | 53.69% || [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_FailedRICH_MissingP_VertexP4KinFit_Phi1850bkgnd.png|left|350px]] || [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_PassedRICH_MissingP_VertexP4KinFit_Phi1850bkgnd.png|left|350px]] | ||
+ | |- | ||
+ | ! LHCb RICH | ||
+ | | <span style="color:blue">88.03%</span> || [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_FailedLHCbRICH_MissingP_VertexP4KinFit_Phi1850bkgnd.png|left|350px]] || [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_PassedLHCbRICH_MissingP_VertexP4KinFit_Phi1850bkgnd.png|left|350px]] | ||
+ | |} | ||
+ | <br style="clear:both;"/> | ||
+ | |||
+ | === bggen Background === | ||
+ | |||
+ | * P vs. θ of π<sup>+</sup>'s as K<sup>+</sup> candidates ("All" means all post-analysis cuts, pre-Cherenkov cuts) | ||
+ | ** π<sup>-</sup>'s as K<sup>-</sup> not shown: identical due to symmetry. | ||
+ | ** Plots are shown for "Missing p, VertexP4 KinFit" only. | ||
+ | {| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;" | ||
+ | !width="75"| Detector | ||
+ | !width="350"| % of Pions That Fail Kaon Cut | ||
+ | !width="350"| Pions That Fail Kaon Cut | ||
+ | !width="350"| Pions That Survive Kaon Cut | ||
+ | |- | ||
+ | ! No CKOV | ||
+ | | [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_All_MissingP_VertexP4KinFit_Phi1850bggen.png|left|350px]] || NA || NA | ||
+ | |- | ||
+ | ! He DC | ||
+ | | 29.32% || [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_FailedHeDC_MissingP_VertexP4KinFit_Phi1850bggen.png|left|350px]] || [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_PassedHeDC_MissingP_VertexP4KinFit_Phi1850bggen.png|left|350px]] | ||
+ | |- | ||
+ | ! Gas Threshold | ||
+ | | 40.64% || [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_FailedGasThresh_MissingP_VertexP4KinFit_Phi1850bggen.png|left|350px]] || [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_PassedGasThresh_MissingP_VertexP4KinFit_Phi1850bggen.png|left|350px]] | ||
+ | |- | ||
+ | ! HBRICH | ||
+ | | 54.70% || [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_FailedRICH_MissingP_VertexP4KinFit_Phi1850bggen.png|left|350px]] || [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_PassedRICH_MissingP_VertexP4KinFit_Phi1850bggen.png|left|350px]] | ||
+ | |- | ||
+ | ! LHCb RICH | ||
+ | | <span style="color:blue">75.50%</span> || [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_FailedLHCbRICH_MissingP_VertexP4KinFit_Phi1850bggen.png|left|350px]] || [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_PassedLHCbRICH_MissingP_VertexP4KinFit_Phi1850bggen.png|left|350px]] | ||
+ | |} | ||
+ | <br style="clear:both;"/> | ||
+ | |||
+ | == Yield %'s & Signal / Background Ratios == | ||
+ | * ALL data are determined from E<sub>γ</sub> = 8.5 - 9.0 GeV | ||
− | * | + | === Yield %'s === |
+ | * % of generated events remaining after all cuts | ||
{| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;" | {| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;" | ||
− | !width=" | + | !width="200"| Detector / PID Cut |
− | !width=" | + | !width="300"| Missing p, No Fit |
− | !width=" | + | !width="300"| Missing p, P4 Fit |
+ | !width="300"| Missing p, VertexP4 Fit | ||
+ | !width="300"| No Missing, No Fit | ||
+ | !width="300"| No Missing, P4 Fit | ||
+ | !width="300"| No Missing, VertexP4 Fit | ||
|- | |- | ||
− | ! | + | ! No CKOV |
− | | | + | | 25.7213% || 29.4203% || 27.1151% || 16.1225% || 12.8963% || 11.6797% |
|- | |- | ||
− | ! | + | ! He DC <br style="clear:both;"/> K: 1 Exclusive |
− | | | + | | 19.1337% || 21.2739% || 19.7511% || 11.7985% || 9.22241% || 8.37895% |
+ | |- | ||
+ | ! Gas Threshold <br style="clear:both;"/> K: 1 Exclusive | ||
+ | | 23.3831% || 26.3302% || 24.3453% || 14.1469% || 11.0374% || 9.99005% | ||
+ | |- | ||
+ | ! HBRICH <br style="clear:both;"/> K: 1 Exclusive | ||
+ | | 25.2832% || 28.441% || 26.3715% || 15.6175% || 12.3001% || 11.1512% | ||
+ | |- | ||
+ | ! LHCb RICH <br style="clear:both;"/> K: 1 Exclusive | ||
+ | | 25.314% || 28.2104% || 26.1134% || 15.397% || 11.9929% || 10.8679% | ||
|} | |} | ||
<br style="clear:both;"/> | <br style="clear:both;"/> | ||
− | * | + | === Exclusive Kaon Cut Signal Yield Loss === |
+ | * % of pre-CKOV signal events LOST due to exclusive Kaon cut | ||
{| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;" | {| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;" | ||
− | !width=" | + | !width="200"| Detector / PID Cut |
− | !width=" | + | !width="300"| Missing p, No Fit |
− | !width=" | + | !width="300"| Missing p, P4 Fit |
− | !width=" | + | !width="300"| Missing p, VertexP4 Fit |
+ | !width="300"| No Missing, No Fit | ||
+ | !width="300"| No Missing, P4 Fit | ||
+ | !width="300"| No Missing, VertexP4 Fit | ||
|- | |- | ||
− | ! | + | ! He DC <br style="clear:both;"/> K: 1 Exclusive |
− | | | + | | 25.6113% || 27.6896% || 27.1582% || 26.8195% || 28.4879% || 28.2606% |
|- | |- | ||
− | ! | + | ! Gas Threshold <br style="clear:both;"/> K: 1 Exclusive |
− | | | + | | 9.09038% || 10.5033% || 10.2149% || 12.2539% || 14.4145% || 14.4665% |
+ | |- | ||
+ | ! HBRICH <br style="clear:both;"/> K: 1 Exclusive | ||
+ | | 1.70343% || 3.32855% || 2.74221% || 3.13199% || 4.62312% || 4.52537% | ||
+ | |- | ||
+ | ! LHCb RICH <br style="clear:both;"/> K: 1 Exclusive | ||
+ | | 1.58339% || 4.11241% || 3.69439% || 4.49982% || 7.00475% || 6.95065% | ||
|} | |} | ||
<br style="clear:both;"/> | <br style="clear:both;"/> | ||
− | + | === Signal / Background Ratios === | |
+ | * Signal / Background Ratios | ||
{| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;" | {| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;" | ||
− | !width=" | + | !width="200"| Detector / PID Cut |
− | !width=" | + | !width="300"| Missing p, No Fit |
− | !width=" | + | !width="300"| Missing p, P4 Fit |
− | !width=" | + | !width="300"| Missing p, VertexP4 Fit |
+ | !width="300"| No Missing, No Fit | ||
+ | !width="300"| No Missing, P4 Fit | ||
+ | !width="300"| No Missing, VertexP4 Fit | ||
|- | |- | ||
− | ! | + | ! No CKOV |
− | | | + | | 0.014492 || 0.00975441 || 0.0195118 || 0.0598644 || 0.658394 || 1.07163 |
|- | |- | ||
− | ! | + | ! He DC <br style="clear:both;"/> K: Inclusive |
− | | | + | | 0.0206374 || 0.0135749 || 0.0331994 || 0.108714 || 0.807195 || 1.13469 |
+ | |- | ||
+ | ! Gas Threshold <br style="clear:both;"/> K: Inclusive | ||
+ | | 0.0242515 || 0.0154948 || 0.0433289 || 0.164763 || 0.903101 || 1.15175 | ||
+ | |- | ||
+ | ! HBRICH <br style="clear:both;"/> K: Inclusive | ||
+ | | 0.0341672 || 0.0207034 || 0.0583342 || 0.246588 || 0.926807 || 1.15841 | ||
+ | |- | ||
+ | ! LHCb RICH <br style="clear:both;"/> K: Inclusive | ||
+ | | 0.0286688 || 0.0179156 || 0.0501617 || 0.211342 || 0.910341 || 1.15521 | ||
+ | |- | ||
+ | ! He DC <br style="clear:both;"/> K: 1 Exclusive | ||
+ | | 0.0570553 || 0.0374778 || 0.0840888 || 0.245871 || 1.05639 || 1.23877 | ||
+ | |- | ||
+ | ! Gas Threshold <br style="clear:both;"/> K: 1 Exclusive | ||
+ | | 0.0704103 || 0.0466157 || 0.115124 || 0.300781 || 1.0219 || 1.11751 | ||
+ | |- | ||
+ | ! HBRICH <br style="clear:both;"/> K: 1 Exclusive | ||
+ | | 0.0968646 || 0.0627223 || 0.154364 || 0.40461 || 1.08359 || 1.14907 | ||
+ | |- | ||
+ | ! LHCb RICH <br style="clear:both;"/> K: 1 Exclusive | ||
+ | | 0.0869476 || 0.0562729 || 0.137432 || 0.379736 || 1.10968 || 1.22991 | ||
|} | |} | ||
<br style="clear:both;"/> | <br style="clear:both;"/> | ||
− | === | + | === Signal / Background Ratios : Improvements Over No CKOV === |
− | + | * Detector Signal / Background Ratio (StBR) DIVIDED BY No CKOV StBR | |
+ | {| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;" | ||
+ | !width="200"| Detector / PID Cut | ||
+ | !width="300"| Missing p, No Fit | ||
+ | !width="300"| Missing p, P4 Fit | ||
+ | !width="300"| Missing p, VertexP4 Fit | ||
+ | !width="300"| No Missing, No Fit | ||
+ | !width="300"| No Missing, P4 Fit | ||
+ | !width="300"| No Missing, VertexP4 Fit | ||
+ | |- | ||
+ | ! He DC <br style="clear:both;"/> K: Inclusive | ||
+ | | 1.42405 || 1.39167 || 1.7015 || 1.816 || 1.22601 || 1.05884 | ||
+ | |- | ||
+ | ! Gas Threshold <br style="clear:both;"/> K: Inclusive | ||
+ | | 1.67344 || 1.5885 || 2.22065 || 2.75227 || 1.37167 || 1.07477 | ||
+ | |- | ||
+ | ! HBRICH <br style="clear:both;"/> K: Inclusive | ||
+ | | 2.35766 || 2.12246 || 2.98968 || 4.11911 || 1.40768 || 1.08098 | ||
+ | |- | ||
+ | ! LHCb RICH <br style="clear:both;"/> K: Inclusive | ||
+ | | 1.97825 || 1.83667 || 2.57083 || 3.53035 || 1.38267 || 1.07799 | ||
+ | |- | ||
+ | ! He DC <br style="clear:both;"/> K: 1 Exclusive | ||
+ | | 3.93702 || 3.84214 || 4.30963 || 4.10714 || 1.6045 || 1.15596 | ||
+ | |- | ||
+ | ! Gas Threshold <br style="clear:both;"/> K: 1 Exclusive | ||
+ | | 4.85856 || 4.77893 || 5.90022 || 5.02437 || 1.55211 || 1.04281 | ||
+ | |- | ||
+ | ! HBRICH <br style="clear:both;"/> K: 1 Exclusive | ||
+ | | 6.684 || 6.43015 || 7.91128 || 6.75878 || 1.6458 || 1.07227 | ||
+ | |- | ||
+ | ! LHCb RICH <br style="clear:both;"/> K: 1 Exclusive | ||
+ | | 5.99969 || 5.76897 || 7.04351 || 6.34328 || 1.68544 || 1.1477 | ||
+ | |} | ||
+ | <br style="clear:both;"/> | ||
− | === bggen Background === | + | <!-- |
+ | == Yields %'s == | ||
+ | * ALL yield %'s are determined in the signal region (track combinations with invariant mass outside of the signal region are ignored) | ||
+ | * NOTE: Yields of "No Missing" (both signal and background) are somewhat inflated (it looks like the proton track uncertainties are too large, causing a spike at 0 in the pulls and 1 in the confidence level) | ||
+ | |||
+ | === genr8 φ<sub>3</sub>(1850) Signal Events === | ||
+ | |||
+ | * % of generated events remaining after all cuts (including a final cut requiring that all tracks have the correct THROWN PID) | ||
+ | {| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;" | ||
+ | !width="350"| Missing p, No KinFit | ||
+ | !width="350"| Missing p, P4 KinFit | ||
+ | !width="350"| Missing p, VertexP4 KinFit | ||
+ | !width="350"| No Missing, No KinFit | ||
+ | !width="350"| No Missing, P4 KinFit | ||
+ | !width="350"| No Missing, VertexP4 KinFit | ||
+ | |- | ||
+ | | || 30.21% || 29.34% || || 10.17% || 9.73% | ||
+ | |} | ||
+ | <br style="clear:both;"/> | ||
+ | |||
+ | * % of BAD reconstructed combos remaining (BAD combo: a combo where at least one track has the wrong THROWN PID) | ||
+ | {| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;" | ||
+ | !width="75"| Detector | ||
+ | !width="350"| Missing p, No KinFit | ||
+ | !width="350"| Missing p, P4 KinFit | ||
+ | !width="350"| Missing p, VertexP4 KinFit | ||
+ | !width="350"| No Missing, No KinFit | ||
+ | !width="350"| No Missing, P4 KinFit | ||
+ | !width="350"| No Missing, VertexP4 KinFit | ||
+ | |- | ||
+ | ! No CKOV | ||
+ | | || <span style="color:red">11.08%</span> || <span style="color:green">6.56%</span> || || 10.04% || 8.11% | ||
+ | |- | ||
+ | ! He DC | ||
+ | | || 10.60% || 6.11% || || 9.90% || 7.98% | ||
+ | |- | ||
+ | ! Gas Thresh. | ||
+ | | || 11.08% || 6.56% || || 10.04% || 8.11% | ||
+ | |- | ||
+ | ! HBRICH | ||
+ | | || 10.59% || 6.10% || || 9.89% || 7.97% | ||
+ | |- | ||
+ | ! LHCb RICH | ||
+ | | || 9.90% || 5.44% || || 9.70% || 7.79% | ||
+ | |} | ||
+ | <br style="clear:both;"/> | ||
+ | |||
+ | === genr8 φ<sub>3</sub>(1850) Background Events === | ||
+ | |||
+ | * % of reconstructed combos remaining | ||
+ | {| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;" | ||
+ | !width="75"| Detector | ||
+ | !width="350"| Missing p, No KinFit | ||
+ | !width="350"| Missing p, P4 KinFit | ||
+ | !width="350"| Missing p, VertexP4 KinFit | ||
+ | !width="350"| No Missing, No KinFit | ||
+ | !width="350"| No Missing, P4 KinFit | ||
+ | !width="350"| No Missing, VertexP4 KinFit | ||
+ | |- | ||
+ | ! No CKOV | ||
+ | | || <span style="color:red">42.99%</span> || <span style="color:red">40.45%</span> || || <span style="color:green">1.01%</span> || <span style="color:green">0.31%</span> | ||
+ | |- | ||
+ | ! He DC | ||
+ | | || 15.47% || 14.28% || || 0.33% || 0.093% | ||
+ | |- | ||
+ | ! Gas Thresh. | ||
+ | | || 4.96% || 4.50% || || 0.12% || 0.045% | ||
+ | |- | ||
+ | ! HBRICH | ||
+ | | || 7.55% || 6.29% || || 0.094% || 0.018% | ||
+ | |- | ||
+ | ! LHCb RICH | ||
+ | | || 0.79% || <span style="color:blue">0.61%</span> || || 0.0062% || <span style="color:blue">0.00062%</span> | ||
+ | |} | ||
+ | <br style="clear:both;"/> | ||
+ | |||
+ | === bggen Background Events === | ||
+ | |||
+ | * % of reconstructed combos remaining | ||
+ | {| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;" | ||
+ | !width="75"| Detector | ||
+ | !width="350"| Missing p, No KinFit | ||
+ | !width="350"| Missing p, P4 KinFit | ||
+ | !width="350"| Missing p, VertexP4 KinFit | ||
+ | !width="350"| No Missing, No KinFit | ||
+ | !width="350"| No Missing, P4 KinFit | ||
+ | !width="350"| No Missing, VertexP4 KinFit | ||
+ | |- | ||
+ | ! No CKOV | ||
+ | | || <span style="color:red">3.56%</span> || <span style="color:green">1.86%</span> || || <span style="color:blue">0.021%</span> || <span style="color:blue">0.012%</span> | ||
+ | |- | ||
+ | ! He DC | ||
+ | | || 2.53% || 1.17% || || 0.017% || 0.011% | ||
+ | |- | ||
+ | ! Gas Thresh. | ||
+ | | || 2.18% || 0.92% || || 0.016% || 0.011% | ||
+ | |- | ||
+ | ! HBRICH | ||
+ | | || 1.61% || 0.72% || || 0.016% || 0.011% | ||
+ | |- | ||
+ | ! LHCb RICH | ||
+ | | || 1.19% || <span style="color:blue">0.44%</span> || || 0.014% || 0.010% | ||
+ | |} | ||
+ | <br style="clear:both;"/> | ||
+ | --> |
Latest revision as of 18:45, 26 September 2012
Contents
Reaction
- γ p → φ3(1850), p
- φ3(1850) → K+, K-
- Final State: p, K+, K-
- Events generated with: Γφ3(1850) = 87 MeV/c2, t-slope = 5.0, 50.0 < Vertex-Z (cm) < 80.0
Analysis Overview
- For each q = +/- particle in the reaction, all detected q = +/- tracks are tested as to whether or not they are that particle
- e.g. If a q = + track has PID FOM > 1% for both the π+ & K+: allow both combinations (DO NOT take the best FOM as true!)
- Maximum of 8 tracks per event (to cut down on memory spikes).
- The analysis (cuts/histing/kinfits) is then performed on each possible track combination (events are only cut if every one of their track combinations is cut):
- Required 45.0 < Track-Vertex-Z (cm) < 85.0
- EXTREMELY loose mass cuts around each mass peak (typically at the histogram edges): saves time by reducing # of kinematic fits to perform
- Require the combined FOM for PID (χ2 and NDF of all tracks summed together) be > 1%
- Where kinematic fit: Require that the confidence level from the kinematic fit be > 1%
- Mass cuts as illustrated.
Mass Peaks & Kinematic Fitting : P Missing
- NOTES:
- Plots are shown for "VertexP4 KinFit" only.
- Mass Plots: Pre-KinFit is Magenta, Post-KinFit is Teal
- Kinematic Fit Confidence Level is zoomed in: spike at 0 confidence is well off the top of the plot
- For the genr8 background, It wasn't possible to lineup every mass peak (without generating the recoil proton at a bogus mass), so the missing mass peak is a little off-center.
- If a cut is shown, then all "Post-KinFit" plots after that cut include it.
Plot | genr8 φ3(1850) Signal | genr8 φ3(1850) Background | bggen Background |
---|---|---|---|
Confidence Level | |||
Missing Mass | |||
φ3(1850) Mass |
Mass Peaks & Kinematic Fitting: No Missing
- NOTES:
- Plots are shown for "VertexP4 KinFit" only.
- Mass Plots: Pre-KinFit is Magenta, Post-KinFit is Teal
- Kinematic Fit Confidence Level is zoomed in: spike at 0 confidence is well off the top of the plot
- For the genr8 background, It wasn't possible to lineup every mass peak (without generating the recoil proton at a bogus mass), so the missing mass peak is a little off-center.
- If a cut is shown, then all "Post-KinFit" plots after that cut include it.
Plot | genr8 φ3(1850) Signal | genr8 φ3(1850) Background | bggen Background |
---|---|---|---|
Confidence Level | |||
Missing Mass Squared | |||
φ3(1850) Mass |
Cherenkov Detector Comparison
genr8 φ3(1850) Background
- P vs. θ of π+'s as K+ candidates ("All" means all post-analysis cuts, pre-Cherenkov cuts)
- π-'s as K- not shown: identical due to symmetry.
- Plots are shown for "Missing p, VertexP4 KinFit" only.
Detector | % of Pions That Fail Kaon Cut | Pions That Fail Kaon Cut | Pions That Survive Kaon Cut |
---|---|---|---|
No CKOV | NA | NA | |
He DC | 39.13% | ||
Gas Threshold | 46.58% | ||
HBRICH | 53.69% | ||
LHCb RICH | 88.03% |
bggen Background
- P vs. θ of π+'s as K+ candidates ("All" means all post-analysis cuts, pre-Cherenkov cuts)
- π-'s as K- not shown: identical due to symmetry.
- Plots are shown for "Missing p, VertexP4 KinFit" only.
Detector | % of Pions That Fail Kaon Cut | Pions That Fail Kaon Cut | Pions That Survive Kaon Cut |
---|---|---|---|
No CKOV | NA | NA | |
He DC | 29.32% | ||
Gas Threshold | 40.64% | ||
HBRICH | 54.70% | ||
LHCb RICH | 75.50% |
Yield %'s & Signal / Background Ratios
- ALL data are determined from Eγ = 8.5 - 9.0 GeV
Yield %'s
- % of generated events remaining after all cuts
Detector / PID Cut | Missing p, No Fit | Missing p, P4 Fit | Missing p, VertexP4 Fit | No Missing, No Fit | No Missing, P4 Fit | No Missing, VertexP4 Fit |
---|---|---|---|---|---|---|
No CKOV | 25.7213% | 29.4203% | 27.1151% | 16.1225% | 12.8963% | 11.6797% |
He DC K: 1 Exclusive |
19.1337% | 21.2739% | 19.7511% | 11.7985% | 9.22241% | 8.37895% |
Gas Threshold K: 1 Exclusive |
23.3831% | 26.3302% | 24.3453% | 14.1469% | 11.0374% | 9.99005% |
HBRICH K: 1 Exclusive |
25.2832% | 28.441% | 26.3715% | 15.6175% | 12.3001% | 11.1512% |
LHCb RICH K: 1 Exclusive |
25.314% | 28.2104% | 26.1134% | 15.397% | 11.9929% | 10.8679% |
Exclusive Kaon Cut Signal Yield Loss
- % of pre-CKOV signal events LOST due to exclusive Kaon cut
Detector / PID Cut | Missing p, No Fit | Missing p, P4 Fit | Missing p, VertexP4 Fit | No Missing, No Fit | No Missing, P4 Fit | No Missing, VertexP4 Fit |
---|---|---|---|---|---|---|
He DC K: 1 Exclusive |
25.6113% | 27.6896% | 27.1582% | 26.8195% | 28.4879% | 28.2606% |
Gas Threshold K: 1 Exclusive |
9.09038% | 10.5033% | 10.2149% | 12.2539% | 14.4145% | 14.4665% |
HBRICH K: 1 Exclusive |
1.70343% | 3.32855% | 2.74221% | 3.13199% | 4.62312% | 4.52537% |
LHCb RICH K: 1 Exclusive |
1.58339% | 4.11241% | 3.69439% | 4.49982% | 7.00475% | 6.95065% |
Signal / Background Ratios
- Signal / Background Ratios
Detector / PID Cut | Missing p, No Fit | Missing p, P4 Fit | Missing p, VertexP4 Fit | No Missing, No Fit | No Missing, P4 Fit | No Missing, VertexP4 Fit |
---|---|---|---|---|---|---|
No CKOV | 0.014492 | 0.00975441 | 0.0195118 | 0.0598644 | 0.658394 | 1.07163 |
He DC K: Inclusive |
0.0206374 | 0.0135749 | 0.0331994 | 0.108714 | 0.807195 | 1.13469 |
Gas Threshold K: Inclusive |
0.0242515 | 0.0154948 | 0.0433289 | 0.164763 | 0.903101 | 1.15175 |
HBRICH K: Inclusive |
0.0341672 | 0.0207034 | 0.0583342 | 0.246588 | 0.926807 | 1.15841 |
LHCb RICH K: Inclusive |
0.0286688 | 0.0179156 | 0.0501617 | 0.211342 | 0.910341 | 1.15521 |
He DC K: 1 Exclusive |
0.0570553 | 0.0374778 | 0.0840888 | 0.245871 | 1.05639 | 1.23877 |
Gas Threshold K: 1 Exclusive |
0.0704103 | 0.0466157 | 0.115124 | 0.300781 | 1.0219 | 1.11751 |
HBRICH K: 1 Exclusive |
0.0968646 | 0.0627223 | 0.154364 | 0.40461 | 1.08359 | 1.14907 |
LHCb RICH K: 1 Exclusive |
0.0869476 | 0.0562729 | 0.137432 | 0.379736 | 1.10968 | 1.22991 |
Signal / Background Ratios : Improvements Over No CKOV
- Detector Signal / Background Ratio (StBR) DIVIDED BY No CKOV StBR
Detector / PID Cut | Missing p, No Fit | Missing p, P4 Fit | Missing p, VertexP4 Fit | No Missing, No Fit | No Missing, P4 Fit | No Missing, VertexP4 Fit |
---|---|---|---|---|---|---|
He DC K: Inclusive |
1.42405 | 1.39167 | 1.7015 | 1.816 | 1.22601 | 1.05884 |
Gas Threshold K: Inclusive |
1.67344 | 1.5885 | 2.22065 | 2.75227 | 1.37167 | 1.07477 |
HBRICH K: Inclusive |
2.35766 | 2.12246 | 2.98968 | 4.11911 | 1.40768 | 1.08098 |
LHCb RICH K: Inclusive |
1.97825 | 1.83667 | 2.57083 | 3.53035 | 1.38267 | 1.07799 |
He DC K: 1 Exclusive |
3.93702 | 3.84214 | 4.30963 | 4.10714 | 1.6045 | 1.15596 |
Gas Threshold K: 1 Exclusive |
4.85856 | 4.77893 | 5.90022 | 5.02437 | 1.55211 | 1.04281 |
HBRICH K: 1 Exclusive |
6.684 | 6.43015 | 7.91128 | 6.75878 | 1.6458 | 1.07227 |
LHCb RICH K: 1 Exclusive |
5.99969 | 5.76897 | 7.04351 | 6.34328 | 1.68544 | 1.1477 |