1. Update 2 on Noise Clusters Hardeep Bansil University of Birmingham 23/04/2013

2. Noise Clusters 2 Difference from Soft Diffractive analysis in way treatment of clusters for gap algorithm Previously checked that clusters not affected by noise but currently no way to check this with D3PDs (until new moment added in) In mean time look at RNDM stream with EMPTY triggers to see if clusters pass significance cuts in empty events – look at 2010 Period B specifically for runs in GRL – as some Period A already studied GRL, pass LAr cut, pass EMPTY trigger – look at hadronically and electromagnetically calibrated clusters Modified code so only cells with positive significances contribute to cluster maps Eta-phi maps use 128 bins in phi, 196 bins in eta

3. Noise Clusters (HAD) 3 Run 153565 – 843427 events, 101629 passing all cuts, 1077 clusters above cuts Far more activity on C side of detector across all runs Strip of activity on C side not observed on A side Block of activity localised on A side

4. Noise Clusters (HAD) 4 Run 155073 – 141318 events, 35328 passing all cuts - 459 clusters above cuts Observe blocks of cluster activity in this run along with general features

5. Noise Clusters (HAD) 5 Run 155112 - 843427 events, 101629 passing all cuts, 419 clusters above cuts

6. Noise Clusters (HAD) 6 Run 155116 – 50264 events, 8390 passing all cuts - 71 clusters above cuts

7. Noise Clusters (HAD) 7 Run 155160 – 210099 events, 28545 passing all cuts - 270 clusters above cuts

8. Noise Clusters (EM) 8 Run 153565 – 843427 events, 101629 passing all cuts, 602 clusters above cuts Fewer clusters passing the cuts compared to HAD calibration but similar patterns as expected 10 most triggered items for run 153565 1: L1_RD1_FILLED 2: L1_RD0_FIRSTEMPTY 3: L1_RD0_EMPTY 4: L1_RD0_FILLED 5: L1_ZB_4MBTS_A 6: L1_RD0_UNPAIRED 7: L1_MBTS_2 8: L1_MBTS_1 9: L1_ZDC 10: L1_EM2

9. Noise Clusters (EM) 9 Run 155073 – 141318 events, 35328 passing all cuts - 295 clusters above cuts 10 most triggered items for run 155073 1: L1_RD0_UNPAIRED 2: L1_RD0_EMPTY 3: L1_RD0_FILLED 4: L1_RD0_FIRSTEMPTY 5: L1_MBTS_2 6: L1_MBTS_2_UNPAIRED 7: L1_MBTS_1_1_UNPAIRED 8: L1_MBTS_4_4_UNPAIRED 9: L1_MBTS_2_UNPAIRED2 10: L1_MBTS_2_UNPAIRED1

10. Noise Clusters (EM) 10 Run 155112 - 843427 events, 101629 passing all cuts, 219 clusters above cuts 10 most triggered items for run 155112 1: L1_RD0_UNPAIRED 2: L1_RD0_EMPTY 3: L1_RD0_FILLED 4: L1_RD0_FIRSTEMPTY 5: L1_MBTS_2 6: L1_MBTS_2_UNPAIRED 7: L1_MBTS_1_1_UNPAIRED 8: L1_EM2 9: L1_MBTS_2_UNPAIRED2 10: L1_MBTS_1

11. Noise Clusters (EM) 11 Run 155116 – 50264 events, 8390 passing all cuts - 35 clusters above cuts 10 most triggered items for run 155116 1: L1_RD0_UNPAIRED 2: L1_RD0_EMPTY 3: L1_RD0_FILLED 4: L1_RD0_FIRSTEMPTY 5: L1_MBTS_2 6: L1_MBTS_2_UNPAIRED 7: L1_MBTS_1 8: L1_MBTS_1_1_UNPAIRED 9: L1_EM2 10: L1_MBTS_4_4_UNPAIRED

12. Noise Clusters (EM) 12 Run 155160 – 210099 events, 28545 passing all cuts - 150 clusters above cuts 10 most triggered items for run 155160 1: L1_RD0_UNPAIRED 2: L1_RD0_EMPTY 3: L1_RD0_FILLED 4: L1_RD0_FIRSTEMPTY 5: L1_MBTS_2 6: L1_MBTS_2_UNPAIRED 7: L1_EM2 8: L1_MBTS_1 9: L1_MBTS_1_1_UNPAIRED 10: L1_MBTS_2_UNPAIRED2