Difference between revisions of "Analysis"

Latest revision as of 18:49, 13 January 2009

Particle Identification
Quality Checks

EG1_Teleconferences_DeltaDoverD

[Back to Delta_D_over_D]

phi angle in CM frame for different runs

some things

@@ Line 1: / Line 1: @@
-=Particle Identification=
+[[Particle Identification]]<br>
-==Electron==
+[[Quality Checks]]<br>
-=== Cuts ===
+[[EG1_Teleconferences_DeltaDoverD]]
-==== Calorimeter based cuts====
+[[http://wiki.iac.isu.edu/index.php/Delta_D_over_D Back to Delta_D_over_D]]
-The distributions below represent two types of cuts applied to improve the electron particle identification (PID) using a 4 GeV electron beam incident on an NH3 target.  The electron calorimeter is segmented into an inner<math>EC_{inner}</math> and an outer<math>EC_{outer}</math> region.  The total energy absorbed by the calorimeter system is recorded in the variable <math>EC_{tot}</math>.  The momentum (<math>P</math>) is calculated using the reconstructed track and the known torus magnetic field.  The distributions of <math>EC_{tot}</math> and <math>EC_{inner}</math> are shown below where both have been divided by the electron momentum and no cuts have been applied.
+[[ phi angle in CM frame for different runs]]<br>
-=====<math>EC_{tot}>0.2*p</math>=====
+[[some things]]
-Without any cuts we have 181018 entries. After using the following cut <math>EC_{tot}>0.2*p</math> we are getting 127719 entries, which is about 70.55% of 181018. <br>
-[[Image:Etotal_P_using_tot_cut.gif | 400 px|left]] [[Image:Einner_P_using_tot_cut.gif | 400 px|right]]<br>
-=====<math>EC_{inner}>0.08*p</math>=====
-[[Image:Etotal_P_using_inner_cut.gif | 400 px|left]] [[Image:Einner_P_using_inner_cut.gif | 400 px|right]]<br>
-[[Image:Etotal_P_using_both_cuts.gif | 400 px|left]] [[Image:Einner_P_using_both_cuts.gif | 400 px|right]]<br>
-After the cut on the energy deposited into inner part of electron calorimeter, number of entries decreases by 22%.<br>
-[[Image:Einner_over_P_using_inner_cut.gif | 200 px]]<br>
- Both cuts are applied<br>
-[[Image:Etotal_over_P_using_both_cuts.gif | 200 px]]<br>
-In case of using the cuts of the total deposited energy and the energy deposited into inner calorimeter number of entries decreases ~36% <br>
-[[Image:Einner_over_P_using_both_cuts.gif | 200 px]]<br>
-====summary table====
-{|border="3"
-!Beam Energy||Torus Current||Begin Run||End Run
-|-
-|1606||1500||25488||25559
-|-
-|1606||1946||25560||25609
-|-
-|1606||1500||25669||25732
-|}
-==Pion==
-=Quality Checks=
-==Rates==
-==Asymmetries==

Difference between revisions of "Analysis"

Latest revision as of 18:49, 13 January 2009

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