1. BNL Director’s Review - 17-Jan-2006 Baker 1 USATLASHI: Collaboration & Plans Mark D. Baker Brookhaven National Laboratory Executive summary: Great physics opportunity Great physics opportunity We were challenged by DOE to: We were challenged by DOE to: Get our act together (collaboration & plan) Get our act together (collaboration & plan) Work with “redirected” money Work with “redirected” money Successes: Successes: We have people and a plan We have people and a plan Best physics & Least new money @ LHC-HI Best physics & Least new money @ LHC-HI

2. BNL Director’s Review - 17-Jan-2006 Baker 2 Status of the field The matter produced at RHIC is VERY black Detailed studies are needed to disentangle RHIC physics Really high p T jets at the LHC should clarify the physics The ATLAS detector is DESIGNED to study jets I. Tserruya, QM05 Summary

3. BNL Director’s Review - 17-Jan-2006 Baker 3 Status of the field The matter produced at RHIC is VERY black Detailed studies are needed to disentangle RHIC physics Really high p T jets at the LHC should clarify the physics The ATLAS detector is DESIGNED to study jets Heavy quarks are flowing Study them carefully at RHIC with PHENIX/STAR upgrades Study them at the LHC where they are copiously produced Multiplicity (CGC!), flow & R AA also very interesting... Day 1 @ LHC-HI should be as exciting as it was at RHIC

4. BNL Director’s Review - 17-Jan-2006 Baker 4 Focus for US-ATLAS-HI Day 1 physics Improve/adapt global event algorithms High p T, jet & heavy flavor physics Improve/adapt algorithms for basic triggering Improve/adapt jet & flavor-tagging algorithms BNL as center of US-ATLAS-HI Computing & Data Analysis Heavy Ion Theory ZDC for ATLAS

5. BNL Director’s Review - 17-Jan-2006 Baker 5 Synergy with RHIC/BNL: Intellectual center Almost all HI experimentalists and many theorists visit every year. Active ongoing experiments Do we want to retain or abdicate this leadership in Heavy Ions & QCD in the LHC era? World-leading and still growing experience in High p T physics analyses (PHENIX) Multi-level triggering (PHENIX) Zero-Degree Calorimetry (S. White) Strong U.S. universities active on ATLAS & RHIC Colorado, Columbia, Iowa State, Stony Brook

6. BNL Director’s Review - 17-Jan-2006 Baker 6 Synergy with US-ATLAS/ACF: USATLAS “Tier 1” Computing Facility Overlap with the RCF Known and smooth working relationships Natural & expected place to put ATLAS-HI Tier 1 DOE-HE-funded Atlas (+ACF) people 25-30 FTEs now, should grow to ~45 FTEs 12 FTE physicists playing a central USATLAS analysis role Int’l-HI & US-HE connections ATLAS-HI co-convened by Helio Takai. Cracow group has a close connection to BNL-Chem. IHEP-Protvino, & LBNL(HE) & Yale to White.

7. BNL Director’s Review - 17-Jan-2006 Baker 7 Status of USATLASHI (9/2005) Messages from DOE visit Physics and cost-effectiveness sound (too) good Plans are vague & therefore not credible Collaborator commitment not clearly identified Technical tasks not spelled out Need resource-loaded schedule No money until FY08 or FY09. People & ZDC must be redirected from base. Computing discussion was largely tabled. FY06 budget roller coaster hampered planning

8. BNL Director’s Review - 17-Jan-2006 Baker 8 Progress in last 4 months Several Decisions Taken Use new standard “ATHENA” code in ATLAS Detailed task-lists / timetables prepared Clear manpower commitments/plans from Columbia, Iowa State, SBU-Chemistry, SBU-Physics BNL manpower commitments/plans: Held up by budget crisis & pending this review Real workers coming on shell

9. BNL Director’s Review - 17-Jan-2006 Baker 9 Use Standard ATHENA code Letter of Intent simulations did not use ATHENA Switching over is time-consuming Dedicated effort required (ATHENA/HIJING) Oct. 22-23, 2005: Tutorial: Srini Rajagopalan et al. Nov. 2005 - now : Work by Olszewski (Krakow) & Leltchouk, Cole (Columbia) Jan. 23-27, 2006: ATHENA/HI-Simulation week @BNL Most efficient in the long run Access to official up-to-date code BNL support – Srini R., Ketevi A., Hong Ma

10. BNL Director’s Review - 17-Jan-2006 Baker 10Milestones Feb. 2006: “Healthy” HI events simulated and reconstructed in ATHENA. Apr. 2006: ZDC prototype module complete. May 2006: “CSC” – mock data challenge Oct. 2006: Physics Performance Report June 2007: pp pilot run (possible PbPb day??) Nov. 2008: PbPb run May 2009: Ready to publish?

11. BNL Director’s Review - 17-Jan-2006 Baker 11 Software Tasks (through May 2009) 220 individual tasks for 31.5 person-years ATHENA/Simulations 1.5 person-year (starting now) Day 1 Readiness + Physics results 3 person-years + 1.5 person-year Quarkonia + Publication 1.5 person-year + 0.5 person-year Tracking 1.5 person-years Jet finding/reconstruction – Main Physics Focus 19 person-years Project Management 3 person-years

12. BNL Director’s Review - 17-Jan-2006 Baker 12 Task Example: Tracking Six subtasks (19 person-months) Reevaluate existing software in ATHENA (4 mo.) Modify xkalman to use a single primary vtx (1 mo.) Track extrapolation to Calorimeter (2 mo.) Tune tracking algorithms (3 mo.) TRT-specific trackfinding (6 mo.) Impact parameter measurement in ATHENA (3 mo.)

13. BNL Director’s Review - 17-Jan-2006 Baker 13 Task Example: Jets Seven Subtasks (19 person-years total): Jet finding, jet core algorithm (33 mos.) Jet finding, sliding window algorithm (33 mos.) Jet finding, likelihood kt algorithm (40 mos.) Jet energy flow (36 mos.) Sub-jet analysis, sliding window (30 mos.) Sub-jet analysis, kt algorithm (24 mos.) Charged particle fragmentation function (30 mos.)

14. BNL Director’s Review - 17-Jan-2006 Baker 14 SubTask Example: Jets Jet finding, likelihood kt algorithm (40 mos.) Develop v0 using only calorimeter (6) Measure v0 performance w/ flow & normal jets (3) Measure v0 performance w/ flow & modified jets (2) Develop v1 using v1 inner tracking (3) Measure v1 performance w/ flow & normal jets (3) Measure v1 performance w/ flow & mod. jets (2) Measure v1 performance alt. HI events & mod. jets (1) Produce production version (2) Evaluate using pp data (4) Test on HI data (6) Final tune for HI data (2)

15. BNL Director’s Review - 17-Jan-2006 Baker 15 Atlas Heavy Ions (1/2006) Non-US International LHEP U. Bern CERN MEPhI, JINR INFN IPNP - Prague UF -Rio de Janeiro U. Geneva INP - Cracow (PHOBOS) United States BNL Chemistry BNL Physics (NP+HEP) Colorado Columbia Iowa State SBU Chemistry SBU Physics

16. BNL Director’s Review - 17-Jan-2006 Baker 16 Committed Manpower Columbia: 2.5 FTEs now, up to 4.5 Cole(0.5), Grau(0.5), Leltchouk, student(0.5) FY07: Add 1 student FY08: Add 1 student (4.5 FTEs total) Iowa State – 1.1 FTEs ++ Rosati (60%), Lebedev (50%), Hill (20%) New faculty in ~ FY08 Students in FY07 or FY08? Stony Brook Chemistry: 1.5 up to 4+ Lacey(0.5), postdoc(0.5), postdoc(0.5) FY07: 2 students FY07: Possible joint faculty (0.5) + more students?

17. BNL Director’s Review - 17-Jan-2006 Baker 17 Planned Manpower BNL 4.3 FTEs up to 5.8 FTEs Baker (0.5), Debbe(0.5), Moraes, Nevski (0.3), Steinberg(0.5), Takai(0.5), Videbaek(0.5), White(0.5) Future (FY07 and/or FY08): Increased % of Baker, Steinberg? Lee(0.5), Nouicer(0.5) Stony Brook (Physics) Under discussion

18. BNL Director’s Review - 17-Jan-2006 Baker 18 FTE plot by quarter (lower limit) CY06Q1 CY07Q1CY08Q1 CY09Q1 10 U.S. FTE-years (Feb. 2006-May 2009): 42

19. BNL Director’s Review - 17-Jan-2006 Baker 19 Bottom-up costing

20. BNL Director’s Review - 17-Jan-2006 Baker 20 Committed labor cost estimate University $700k/yr ($450k from DOE) committed spring ‘06. Should grow by > x2 by startup. BNL – NP ~$600k now (2.5 FTE x $250k)

21. BNL Director’s Review - 17-Jan-2006 Baker 21 Non-US declared FTEs (lower limit) 6.5 FTEs total. No growth plan indicated. Krakow – 5 heads, 3 FTEs Wosiek(0.5), Olszewski(0.5), Toczek(1), Trzupek(0.5), Wozniak(0.5) Geneva – 1 head, 1 FTE Rosselet (1) Prague – 2 heads, 1.5 FTE Dolejsi(0.5), Spousta(1) MEPhI – 2 heads, 1 FTE Pozdnyakov(0.5), Timoshenko(0.5)

22. BNL Director’s Review - 17-Jan-2006 Baker 22 FTE plot by quarter (lower limit) CY06Q1 CY07Q1CY08Q1 CY09Q1 10 U.S. Europe FTE-years (Feb. 2006-May 2009): 42 + 21

23. BNL Director’s Review - 17-Jan-2006 Baker 23ZDC Multipurpose Heavy Ion centrality & event selection “Deep” Ultraperipheral collisions Structure @ low x, high “Q” – CGC etc. Critical for instrumentation Something to “own” Needs to get official ATLAS approval Peter Jenni: [The ZDC] “would be a welcome further step” Needs to be financed first (!) Needs to be compatible with LHCf + ATLAS plans Next step clear: (SW+MDB+HG, March Workshop)

24. BNL Director’s Review - 17-Jan-2006 Baker 24ZDC Proposal: Use BNL-NP baseline capital Complete project plan available 75 350 75 500 Old numbers:

25. BNL Director’s Review - 17-Jan-2006 Baker 25 Summary of “Project” Plan No actual DOE MIE project requested. Research Operations funding requested Recurring capital computing expense requested ZDC proposed as a small capital project funded through BNL-NP baseline capital Ideal high-payback project under DOE rules of engagement Great physics & visibility Small capital investment

26. BNL Director’s Review - 17-Jan-2006 Baker 26 CERN view of ATLAS-HI LHCC (LHC Committee): “encourages the ATLAS Collaboration to continue their studies for heavy ion physics with a view to submitting a Physics Performance Report.” - May 2004 Hermann Schmickler, CERN-AB-BDI-GL w/ S. White: “On the Potential Use of Zero-Degree Calorimetry for LHC Luminosity Monitoring”, LARP Meeting, Port Jefferson, NY - April 2005 Glossary: AB = Accelerators and Beams Dept. BDI= Beam Diagnostics & Instrumentation GL = Group Leader LARP = U.S. LHC Accelerator Research Program

27. BNL Director’s Review - 17-Jan-2006 Baker 27 ATLAS HI Summary ATLAS is ideal for studying jets & heavy flavor high granularity of the calorimeter external muon spectrometer Si vertex detector availability on day 1 Very leveraged investment Collaboration requirements on DOE-NP are minimal Strong U.S.ATLAS (HEP) group in proximity to RHIC Maintains BNL as Intellectual Center of HI/QCD Physics U.S. ATLAS-HI Collaboration is healthy and growing Lots of work & great physics ahead!