Reaction Plane Calibration

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Presentation transcript:

Reaction Plane Calibration 21th Jul 2012 Maki KUROSAWA for VTX

<cos nY> and <sin nY> Reaction Plane Calibration Status Currently, calibration parameters were generated aggregated run by run and segment by segment. 1) Run-by-run : calibration parameters were generated from segment number 9000. This calibration parameter set was applied for other segment files. 2) Seg-by-seg : calibration parameters were generated segment by segment. Each segment file has own calibration parameters. Checked <cos nY> and <sin nY> of segment number dependency in both case. Status <cos nY> and <sin nY> Raw v2 and v2 run-by-run (case 1) Seg. Dependence unstable seg-by-seg (case 2) Seg. Dependence stable

QA : Segment Dependence of <cos nY>, <sin nY> (SVX-SN) Use calibration parameters that are created by using segment 9000. v2 0.2 Run349667 <cos(2(YSVX(SN)))> -0.2 9000 9002 9004 v3 9006 9008 cos term <cos(3(YSVX(SN)))> v2 <sin(2(YSVX(SN)))> sin term v3 <sin(3(YSVX(SN)))> segment number

QA : Segment Dependence of <cos nY>, <sin nY> (SVX-SN) Use calibration parameters that are created by using segment 9000. v2 0.2 Run349667 <cos(2(YSVX(SN)))> -0.2 9000 9002 9004 v3 9006 9008 cos term <cos(3(YSVX(SN)))> Ncluster_egap2 segment number

QA : ZVTX Dependence of Q_weight (number of clusters for SVX) counts counts counts -10cm 10cm cm

Raw V2 and Corrected V2 Distribution (Run349667) Use calibration parameters that are created by using segment 9000. Reaction plane : SVX-SN Egap-2 Track : CNT 2 < pT GeV/c < 3 9000 9001 9002 9003 9004 9005 9006 9007 9008 9009 centrality centrality Raw v2 for each segment are unstable.

QA : Segment Dependence of <cos nY>, <sin nY> (BBC-SN) Use calibration parameters that are created by using segment 9000 (~360k events). v2 0.2 Run349667 <cos(2(YSVX(SN)))> -0.2 9000 9002 9004 v3 9006 9008 cos term <cos(3(YSVX(SN)))> v2 <sin(2(YSVX(SN)))> sin term v3 <sin(3(YSVX(SN)))> segment number

Raw V2 and Corrected V2 Distribution (Run349667) Use calibration parameters that are created by using segment 9000. Reaction plane : BBC-SN Track : CNT 2 < pT GeV/c < 3 9000 9001 9002 9003 9004 9005 9006 9007 9008 9009 centrality centrality Raw v2 for each segment are stable.

QA : Segment Dependence of <cos nY>, <sin nY> (SVX-SN) Use calibration parameters that are created by using segment 9000-0 (36k events). v2 0.2 Run349667 <cos(2(YSVX(SN)))> -0.2 9000-0 9000-2 9000-4 9000-6 9000-8 cos term <cos(3(YSVX(SN)))> v2 <sin(2(YSVX(SN)))> sin term v3 <sin(3(YSVX(SN)))> segment number

QA : Segment Dependence of <cos nY>, <sin nY> (SVX-SN) Use calibration parameters that are created by using segment 9000-0. v2 0.2 Run349667 <cos(2(YSVX(SN)))> -0.2 9000-0 9000-2 9000-4 9000-6 9000-8 cos term <cos(3(YSVX(SN)))> v2 Ncluster_egap2 segment number

Segment by Segment

QA : Segment Dependence of <cos nY>, <sin nY> (SVX-SN) Useed calibration parameters that are created segment by segment. v2 0.2 Run349679 <cos(2(YSVX(SN)))> -0.2 9000 9002 9004 v3 9006 9008 cos term <cos(3(YSVX(SN)))> v2 <sin(2(YSVX(SN)))> sin term v3 <sin(3(YSVX(SN)))> segment number

Raw V2 and Corrected V2 Distribution (Run349667) Use calibration parameters that are created for each segment Reaction plane : SVX-SN Egap-2 Track : CNT 2 < pT GeV/c < 3 9000 9001 9002 9003 9004 9005 9006 9007 9008 9009 centrality centrality Raw v2 for each segment are stable.

Raw V2 and Corrected V2 Distribution (Run349667) Use calibration parameters that are created for each segment. Reaction plane : BBC-SN Track : CNT 2 < pT GeV/c < 3 9000 9001 9002 9003 9004 9005 9006 9007 9008 9009 centrality centrality Raw v2 for each segment are stable.

BACKUP SLIDES

Reaction Plane Class cos Totally 39 class for Flattening calibration South North eta region -3<=eta<-2.5 -2.5<=eta<-2 -2<=eta<-1.5 -1.5<=eta<-1 -1<=eta<-0.5 -0.5<=eta<0 0<=eta<0.5 0.5<=eta<1 1<=eta<1.5 1.5<=eta<2 2<=eta<2.5 2.5<=eta<3 all eta SVX 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 north south north + south MPC 25 26 27 BBC 28 29 30 SMD 31 32 33 subsample1 subsample2 subsample3 subsample4 total CNT 34 35 36 37 38 cos Totally 39 class for Flattening calibration  generate 39 reaction planes

Y Correlation for SVX, MPC and BBC (RUN 349667 360K Events) Resolution is 25% at 20% centrality between SVX(SN) and BBC(SN) SVX (SN) Vs BBC (SN) SVX (S) SVX (N) MPC (S) MPC (N) BBC (S) BBC (N) <cos(2(YA - YB))> <sin(2(YA - YB))>