T0 EventPlane study
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Transcript of T0 EventPlane study
T0 EventPlane study
2013. 2. 5.Ko-ALICE MeetingMyunggeun Song
T0 config ( z= 373cm , -65 cm )
Multiplicity over All events from AMPT
True RP A-C side
• True RP : use all tracks in |eta| > 1 from AMTP
True RP Aside
True RP Cside
8Sector MethodMerge cells into colored 8 sectors.Evaluate EP with those 8 sectors.
Problem : Geometrical mean phi of sector is being used.( No consideration on Geometrical asymmetry and multiplicity in each cells )
Even weighted phi will not have geometrical symmetry.
8Sector method Aside
8Sector method Cside
True RP A – All sector A
• All Sector : – Use All cells to Evaluate Event plane– No correction
All Sector Aside
Modulation in Psi distribution.Be able to be expected analytically
However, Good resolution and no better idea yet
True RP C – All sector C
All Sector Cside
All Sector Cside
All sector A – All sector C
Resolution
• TrueRP A & TruRP C = 0.7523 ( 0.867 )• TrueRP A & AllSector A = 0.5437• TrueRP C & AllSector C = 0.7475• AllSector A & AllSector C = 0.3469 ( 0.589 )
Summary
• With AllSector method, resolution can be reached to 0.8(Cside) 0.6(Aside), 0.9(Full)– Not BAD!!
• Some other idea,– More Analytical development – Cut some cells which are at the outside of ideal
circle and phi equalize for the circle.
Further study
Further study