Weekly Report Maya SHIMOMURA Run dependent check for VTX alignment 12/04/23 RIKEN VTX Meeting

Check run dependent of Alignment. Steps and status. Find good runs and transfer PRDFF files from HPSS. Produce DST form one PRDFF for each run, and measure the beam center. Re-produce corresponding zero-field DST files with recent geometry file and geometry offsets. Get new geometry offsets between CNT and DSTs. Check the alignment of new run with new offsets. Since we want to check the period after the central arm was moved, we need step 1 to 3. We need to be done this check by production. 12/04/23 RIKEN VTX Meeting

Run 346977(zero-filed) beam center of VTX west xoffset 1st0.00947036 +- 2.04026e-05 cm west yoffset 1st0.00457261 +- 1.70822e-05 cm west xoffset 2nd0.00932958 +- 1.8664e-05 cm west yoffset 2nd0.00452636 +- 1.53377e-05 cm west sigma of DCA 0.0154155 cm east xoffset 1st0.00353536 +- 5.46031e-05 cm east yoffset 1st0.00317136 +- 3.23536e-05 cm east xoffset 2nd0.00341359 +- 5.02465e-05 cm east yoffset 2nd0.00321458 +- 2.9526e-05 cm east sigma of DCA 0.0160936 cm Offsets are very small mostly less than 100 microns. This means the Central Arm position returned to the position which is very close to the original, since I used previous offsets to obtained these values. --- I used “OffsetVtxToCnt :(-0.169,-0.122,0.) “ 12/04/23 RIKEN VTX Meeting

DCA for WEST (Zero field ) run346977 12/04/23 RIKEN VTX Meeting

DCA for EAST (Zero field ) run346977 12/04/23 RIKEN VTX Meeting

DCA for EAST (Zero field ) run346977 There is some strange structures on DCA 12/04/23 RIKEN VTX Meeting

Run 347148(zero-filed) beam center of VTX west xoffset 1st 0.00793747 +- 2.06514e-05 cm west yoffset 1st 0.0103243 +- 1.74468e-05 cm west xoffset 2nd 0.00779426 +- 1.93322e-05 cm west yoffset 2nd 0.0102824 +- 1.58632e-05 cm west sigma of DCA 0.0139616 cm east xoffset 1st 0.0016782 +- 5.68433e-05 cm east yoffset 1st 0.00886769 +- 3.75067e-05 cm east xoffset 2nd 0.000921433 +- 4.15905e-05 cm east yoffset 2nd 0.00857972 +- 2.37594e-05 cm east sigma of DCA 0.0146129 cm 12/04/23 RIKEN VTX Meeting

WEST (run347148) DCA for WEST (Zero field ) DCA ϕ DCA DCA DCA ϕ ϕ 12/04/23 ϕ RIKEN VTX Meeting ϕ

East (run347148) DCA for EAST (Zero field ) DCA ϕ DCA DCA DCA ϕ ϕ 12/04/23 RIKEN VTX Meeting

Run 347797 (zero-field) west xoffset 1st0.00929465 +- 1.55312e-05 cm west yoffset 1st-0.00192074 +- 1.17158e-05 cm west xoffset 2nd0.00900747 +- 1.34553e-05 cm west yoffset 2nd-0.00197225 +- 9.89384e-06 cm west sigma of DCA 0.013033 cm east xoffset 1st0.00270905 +- 3.28148e-05 cm east yoffset 1st-0.00538631 +- 1.72307e-05 cm east xoffset 2nd0.00296992 +- 2.97747e-05 cm east yoffset 2nd-0.00559033 +- 1.51476e-05 cm east sigma of DCA 0.0138631 cm 12/04/23 RIKEN VTX Meeting

West (run347797) DCA for West (Zero field ) DCA DCA ϕ DCA DCA ϕ ϕ 12/04/23 RIKEN VTX Meeting

East (run347797) DCA for EAST (Zero field ) DCA ϕ DCA DCA DCA ϕ ϕ 12/04/23 RIKEN VTX Meeting

Run 349006 (zero-field) west xoffset 1st0.00152661 +- 2.04441e-05 cm west yoffset 1st0.0120213 +- 1.42823e-05 cm west xoffset 2nd0.00135035 +- 1.85949e-05 cm west yoffset 2nd0.0121247 +- 1.25095e-05 cm west sigma of DCA 0.0140814 cm east xoffset 1st-0.000552777 +- 4.94218e-05 cm east yoffset 1st0.010846 +- 2.72888e-05 cm east xoffset 2nd-0.000342648 +- 4.63409e-05 cm east yoffset 2nd0.0108198 +- 2.48255e-05 cm east sigma of DCA 0.0147744 cm 12/04/23 RIKEN VTX Meeting

Peak position vs. ladder number No significant differences are seen. 12/04/23 RIKEN VTX Meeting

Peak σ vs. ladder numbers Systematically East and West are different. 12/04/23 RIKEN VTX Meeting

Summary I checked run dependence for all periods after June 1st, before and after central arm was moved several times. 4 data sets are compared. No significant difference are seen. Ready for production. The codes for QA histograms are also ready. 12/04/23 RIKEN VTX Meeting

Both run#349369 and run#349679 are in this period. Zero field run 346977 Zero field run 347148, 347149 Zero field run 347796, 347797 Zero field run 349005, 349006,349007 Both run#349369 and run#349679 are in this period. 12/04/23 RIKEN VTX Meeting

Back Up 12/04/23 RIKEN VTX Meeting

Run 349006 (zero-field test) west xoffset 1st0.00775837 +- 2.8371e-05 cm west yoffset 1st0.0139822 +- 1.91746e-05 cm west xoffset 2nd0.00861924 +- 2.67066e-05 cm west yoffset 2nd0.0143985 +- 1.77441e-05 cm east xoffset 1st-0.000265845 +- 5.93975e-05 cm east yoffset 1st0.0105705 +- 3.59323e-05 cm east xoffset 2nd3.14745e-05 +- 5.73626e-05 cm east yoffset 2nd0.0103684 +- 3.20768e-05 cm east sigma of DCA 0.0202502 cm 12/04/23 RIKEN VTX Meeting

run347141 x- beam center :0.0562326 y- beam center :-0.0587112 12/04/23 RIKEN VTX Meeting

Summary of beam offset old(hidemitsu) vtx_west dch_west vtx_east dch_east 346977 (0.226,0.056) (0.048,-0.039) (0.093,0.076) (0.030,-0.036) 347148 (0.227,0.071) (0.068,-0.044) (0.091,0.079) (0.084,-0.025) 347797 (0.225,0.049) (0.035,-0.023) (0.087,0.064) (0.046,-0.020) 349006 (0.220,0.069) (0.056,-0.044) (0.084,0.086) (0.029,-0.047) (vtx-dch)west (vtx-dch)east dch(west-east) 346977 (0.176,0.095) (0.063,0.112) (0.018,-0.003) 347148 (0,159,0.115) (0.007,0.104) (-0.016,-0.019) 347797 (0.190,0.072) (0,041,0.084) (-0.011,-0.003) 349006 (0.164,0.113) (0.055,0.133) (0.027,0.003) 12/04/23 RIKEN VTX Meeting

Beam offset measured by DCH vs VTX What I did ? -I calculated… Beam offset measured by VTX Beam offset measured by DCH Last week I reported the result of run346977 VTX Beam offset WEST ( 0.226cm,0.056cm) EAST ( 0.093cm,0.076cm) DCH Beam offset WEST (0.048cm,-0.039cm) EAST (0.030cm,-0.036cm) Should we move VTX coordinate ? Before that, I will check another zero field run . “(VTX Beam offset )–(DCH Beam offset) is stable ?” Zero filed run list Jun 1 ………. VTX 4th repair Jun 2 ........ 5:50 zero-field run (346977) Jun 4 ........ 1:45 zero-field run (347148,347149) Jun 7 ........ 18:20 zero-field run (347796, 347797) Jun 16 ........ 3:00 zero-field run (349005, 349006, 349007) Jun 20 ........ 8:00 end of 200GeV Au+Au 12/04/23 RIKEN VTX Meeting

Beam offset measured by DCH Thanks to Ciprian and Okada-san 　α R: average radius of the DCH R= 224cm (dx,dy) : beam offset >Plot α　vs　φ >Fit with [0]*sin(φ)+[1]*cos(φ) Where [0] = dx/R,[1]= -dy/R [0] = dx/R, [1]= dy/R ref : AN923 12/04/23 RIKEN VTX Meeting

DCH analysis Date: (June 7th) --Cut-- -10 < BBC <200 -Track quality 63 or 31 63:(PC1 found unique hit, UV found unique hit, x1 and x2 used) 31:(PC1 found ambiguous hits , UV found with one best choice, x1 and x2 used) West -0.012<emcdphi<0.008 rad -8cm<emcdz<5cm ecore >0.3GeV |pc3dphi| < 0.03 rad EAST -0.007<emcdphi<0.010 rad -9cm < emcdz < 3cm 12/04/23 RIKEN VTX Meeting

How to calculate the beam offset X Y Beam center (xoffset,yoffset) (x0,y0) hit at L0 (pixel) (x1,y1) hit at L1 (pixel) φb:angle of track in XY -plane   DCA = yoffset*cosφb - xoffset*sinφb fit function vtxy: intersection point at x=0) L0 L1 DCA from (0,0) (This is calculated in VTX internal coordinate) 12/04/23 RIKEN VTX Meeting