Bologna Report M. Pozzato on behalf of Bologna Group Cetara Meeting – 13/09/2010

Summary Lab status Lab status Scanning Plan Scanning Plan Quality of CS predictions Quality of CS predictions Vertex Location + Decay Search Vertex Location + Decay Search 2 13/09/2010

Lab Status Software (Cuba Libre Edition): Software (Cuba Libre Edition):  SySal.NET 2.6_  SySal.NET 2.6_  SySal-ScanGrid 2.6_  SySal-ScanGrid 2.6_  SySal _  SySal _ Scanning resources used up to now: Scanning resources used up to now: - 1 Standard ESS equipped with Plate Changer (glued setup); - 1 Standard ESS equipped with Plate Changer (glued setup); - 2 Standard ESS - 2 Standard ESS Not available for scanning (R&D in progress): Not available for scanning (R&D in progress): - 1 Standard ESS equipped with Plate Changer (not-glued setup); - 1 Standard ESS equipped with Plate Changer (not-glued setup); - 1 Custom ESS equipped with 100x - 1 Custom ESS equipped with 100x Human resources: slightly affected by shifts at LNGS and vacation. 3 13/09/2010

Bologna Scanning Plan HW: The R&D on “not-glued setup” is coming to a successfully conclusion and the microscope is operative. One more plate changer is being installed and will be available within a few weeks. The custom ESS has been equipped with a revolver to host both 100x and 40x objectives in order to be used for standard scanning Final scanning resources available : 2 ESS+PC (not glued) 1 ESS+PC (glued) 1 ESS 1 custom ESS with 100X and 40X SW: Scan-back supervised has been recently substituted by not-supervised track-follow. A lot of manual check is not necessary anymore. We will complete the R&D on on-line filtering of microtracks by the end of the year. We foresee the this could speed up our CS-to-brick connection. These improvements plus other minor changes and an improved organization will increase our scanning speed. Manpower (devoted to scanning, development and scanning station): 4 physicists at least (staff, postdoc, Phd Student), 2 technicians for scanning, 1 technician for full-time PlateChanger supporting, 1 technician for computing, For 2011 we foresee to complete at least 8-10 bricks/week. for /09/2010

Quality of CS Predictions 2008 : CC: ~80%  ~70% with muon  ~59% convergence pattern  ~30% no muon  ~65% convergence pattern NC: ~20%  ~77% convergence pattern 2009 : CC: ~77%  ~84% with muon  ~47% convergence pattern  ~16% no muon  ~100% convergence pattern NC: ~23%  ~65% convergence pattern convergence pattern defined as: - at least 2 tracks converging inside the brick - IP <1000 (showers are included….not all converging patterns lead to primary vertex) Info downloaded from OPITA (includes also NOT delivered bricks) 5 13/09/2010

Event – brick /09/ predictions delivered by LNGS, only one track connected BUT vetoed. Very Poor Hits Filtered data: empty walls - Dubna Algorithm cannot find the wall.

Event – brick /09/ Muon passing….seems to be passing also by eledet

Vertex Location & Decay Search 13/09/ RUN2008 ALL CC NC Received Scanning Connected Loc_DM_PT Localized Dead Material PT BrickDump: 9 DECAY SEARCH: 40 CC +9 NC

Run 2009 RUN 2009 ALL CC NC Received Scanning Connected Completed Localized Dead Material PT /09/2010 Total Scan done. Vertex to be confirmed ~12 Wait LNGS interaction: 9 Scanned but need further analysis: ~10 Brick-Dump (Fog > 15) : 4 Tentative connection done before dumping… 1 brick out of 5 localized DECAY SEARCH: 18 CC + 1 NC

Slope 2008 Run 13/09/

Slope Run /09/

Multiplicity 13/09/

13/09/

Backup- old 13/09/

X Y Z X Brick , charm candidate Interesting events from 2008 decay search

idIPidIP µ µ µ µ µ id IPIP_D µ idIPIP_D µ µ /09/2010

id IPidIP µ primary = ( , , ) secondary = ( , , ) 2 3 µ 4 ΔZ = µm flight lenght = µm φ = 73.5 ° SX = SY = low momentum track, P = 0.33; 0.22; 0.64; 0.90 gamma ΔZΔZ Z X Hypothesis /09/2010

idIPD_IP id IPD_IP idIPD_IP idIPD_IP idIPD_IP Vertice tra le tracce Vtx ( , , ) (pl 47.8, ~ bottom 48) IP = 0.7 Vtx2 ( , , ) Vtx1( , , ) ΔZ=270.1 µm vtx2 46 vtx1 ΔZΔZ 41 SX = SY = Fligth Length = µm φ = 58.9° 18 13/09/2010

19 13/09/2010

Plate Changer 1 – plate changer (glued emu) 1 – plate changer (not glued emu) Equiped with bigger suction cap Emulsions are easily detached from the stage Space allocated for one more plate changer: will be set-up in August by Luigi Modified air compressed circuit to give higher pressure to detach emulsions  broken two oil-filters  some pressure reductors not installed yet /09/2010

Charm Event From Naples Fog: 6  7 Fog: 6  7 Predictions: 28 predictions Predictions: 28 predictions Matched: 16  SB Matched: 16  SB Time for Location: 1 day (SB + TS) Time for Location: 1 day (SB + TS) PRELIMINARY 21 13/09/2010

Eledet Display 22 13/09/2010

ID TX TY IP ID TX TY IP ID TX TY IP (~130 um) Primary vertex: , , (between PL 28 and PL 29) 23 13/09/2010

Secondary vertex: , , (between PL 31 and PL 32) 1 parent (id 7 in the previous slide) 1 charged daughter (TX: 0.210, TY: 0.021) 4 gammas Manual measurement at 100x objective to estimate e+e- angular aperture and accurate pointing direction in progress… 24 13/09/2010