1. Liming CHEN, Bo LI, Emmanuel MONNIER, Lian-You SHAN, Chengguang ZHU FCPPL5, Mar 21, Orsay ( Many thanks to the organizers )

2. + Introduction + W polarization measurement – Semi-lepton channel – Di-lepton channel + Top spin correlation measurement + Summary Saclay, Mar 23, 2012L.Y. SHAN @ W&top polarization2

3. + “top property group” in ATLAS – CPPM, SDU, IHEP in competing with  Gottingen, LIP, + 1.04/fb 2011 data analyzed – Note prepared + 4.7/fb analysis in progress – spin correlation in preparation Saclay, Mar 23, 2012L.Y. SHAN @ W&top polarization3

4. Saclay, Mar 23, 2012L.Y. SHAN @ W&top polarization4

5. EF_e20_medium/EF_mu18 EF_e22vh_medium1 EF_mu18_medium The angle between lepton direction in W ( top ) rest frame and W ( top ) direction in top ( ttbar ) rest frame Saclay, Mar 23, 2012L.Y. SHAN @ W&top polarization5 t w

6. Saclay, Mar 23, 2012L.Y. SHAN @ W&top polarization6

7. Saclay, Mar 23, 2012L.Y. SHAN @ W&top polarization7 elemuo + W+jet : 2-b tag MC-effi multiplied to DD scale + Mjets : DD-extracted faking multiplied to loose-control + Others : MC simulation

8. Saclay, Mar 23, 2012L.Y. SHAN @ W&top polarization8

9. uncertF0 emFL emF0 muFL muF0 combFL comb ISR/FSR0.0540.0300.0330.0190.0400.018 JER0.0450.020 0.0250.0350.011 Btag0.0280.0140.0240.0150.0300.022 JES0.0220.0030.0190.0070.0170.005 LHC ?0.0360.0160.013 0.0320.018 LRE0.0160.0070.0290.0060.0270.028 Saclay, Mar 23, 2012L.Y. SHAN @ W&top polarization9 SM 0.695 0.304 Dominant uncertainty In addition to ATLAS-Conf notes, The Editor Board has approved the paper draft on 1/fb result

10. Saclay, Mar 23, 2012L.Y. SHAN @ W&top polarization10

11. Saclay, Mar 23, 2012L.Y. SHAN @ W&top polarization11

12. Saclay, Mar 23, 2012L.Y. SHAN @ W&top polarization12 Systematics in progress, many thanks to Liming CHEN 380/3139/1045 events in ee/em/mm channel

13. Saclay, Mar 23, 2012L.Y. SHAN @ W&top polarization13

14. + C = 0.42 ( SM 0.32 ) + Systematics ongoing, many thanks to Bo LI Saclay, Mar 23, 2012L.Y. SHAN @ W&top polarization14 About 3500 ele eventsAbout 500 Muo events

15. + Good progress + Work more for better precision – Thanks ! Saclay, Mar 23, 2012L.Y. SHAN @ W&top polarization15