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T0 EventPlane study

T0 EventPlane study. 2013. 2. 5. Ko -ALICE Meeting Myunggeun 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 Method.

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T0 EventPlane study

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  1. T0 EventPlane study 2013. 2. 5. Ko-ALICE Meeting Myunggeun Song

  2. T0 config ( z= 373cm , -65 cm )

  3. Multiplicity over All events from AMPT

  4. True RP A-C side • True RP : use all tracks in |eta| > 1 from AMTP

  5. True RP Aside

  6. True RP Cside

  7. 8Sector Method Merge 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.

  8. 8Sector method Aside

  9. 8Sector method Cside

  10. True RP A – All sector A • All Sector : • Use All cells to Evaluate Event plane • No correction

  11. All Sector Aside Modulation in Psi distribution. Be able to be expected analytically However, Good resolution and no better idea yet

  12. True RP C – All sector C

  13. All Sector Cside

  14. All Sector Cside

  15. All sector A – All sector C

  16. 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 )

  17. 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.

  18. Furtherstudy

  19. Furtherstudy

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