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ALICE at LBNL

This document highlights the significant contributions made by the RNC in heavy ion physics through the ALICE and STAR collaborations at RHIC and LHC. It discusses key accomplishments like the discovery of jet quenching and collective flow, alongside advancements in detector technologies such as the EMCAL and timing projection chambers. The roles of senior and staff scientists in guiding these projects are detailed, along with future workforce projections and how RNC's participation will evolve over time. Noteworthy publications from STAR showcase the impact of these research efforts.

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ALICE at LBNL

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  1. ALICE at LBNL Peter Jacobs • RNC accomplishments in heavy ion physics • Jet quenching at RHIC and LHC • RNC in ALICE: Physics, EMCal project, PDSF • Workforce projections

  2. RNC accomplishments in heavy ion physics • Development of the Time Projection Chamber for heavy ion physics: EOS → STAR • Development and leadership of STAR at RHIC • Discovery of collective flow at the Bevalac, CERN SPS, and RHIC • Co-discovery and detailed elucidation of jet quenching at RHIC • Development of a new generation of ultra-high precision vertex detectors

  3. RNC accomplishments cont’d • STAR publications with SPIRES TOPCITE 250+: • Elliptic flow at RHICK.H. Ackermann et al. (STAR), Phys. Rev. Lett. 86:402 (2001). • Jet quenching@130 GeV C. Adler et al. (STAR), Phys. Rev. Lett. 89:202301 (2002). • Back-to-back hadron suppressionC. Adler et al. (STAR), Phys. Rev. Lett. 90:082302 (2003). • Jet quenching @ 200 GeV J. Adams et al. (STAR), Phys. Rev. Lett. 91:172302 (2003). • d+Au: J. Adams et al. (STAR), Phys. Rev. Lett. 91:072304 (2003). • STAR White Paper J. Adams et al. (STAR), Nucl.Phys. A757:102 (2005). • All six papers have primary authors from the RNC • RNC is among the world’s leading heavy ion research groups

  4. Photons (color-neutral) Jet fragments (color-charged) pTassoc > 2 GeV pTassoc > 0.15 GeV cos(Df) STAR, Phys Rev Lett 91, 072304 STAR, Phys Rev Lett 95, 152301 Jet quenching at RHIC

  5. Yield per trigger pTtrigger>8 GeV/c STAR, PRL 97, 162301 (2006) Jet quenching: the deeper we dig, the more we find… Jet quenching will be as central to the LHC heavy ion program…

  6. Casalderrey-Solana and Wang arXiv:0705.11352 Jet quenching in ALICE • Consider jet quenching similar to DIS • jet energy variation probes QGP at varying length scales…

  7. EMCal kinematic reach 175 GeV jets in ALICE acceptance Ratio of purple/red ALICE+EMCal enables world-class jet quenching measurements Jet quenching Dashed line = no jet quenching

  8. LBNL Personnel on ALICE • RNC Senior Staff Scientists • P. Jacobs • H.-G. Ritter • T. J. M. Symons • RNC Staff Scientists: • S. Klein • G. Odyniec • M. van Leeuwen (term) • RNC Postdocs: • J. Putschke • LBNL Engineering Division (EMCal Project Funds): • J. Rasson • D. Peterson

  9. Physics Activities 2008 In addition: 0.5-1.0 FTE for PDSF

  10. Physics Activities 2010 In addition: 0.5-1.0 FTE for PDSF

  11. EMCal Project Participation RNC: P. Jacobs (Deputy Contract Project Manager) S. Klein G. Odyniec J. Putschke H. Ritter J. Symons M. van Leeuwen LBNL Engineering: J. Rason (Deputy Contract Project Manager) D. Peterson • LBNL responsibilities: • Project management • Mechanical engineering oversight • Trigger • Software and computing (PDSF) • Physics leadership

  12. PDSF • PDSF at NERSC: • cost effective platform for large scale NP/HEP experimental computing • plays essential role in STAR • RNC contributes 1.5 FTE • PDSF in ALICE: Costs and implementation: see Ron Soltz’s talk NSD contributes 0.5-1.0 FTE for ALICE

  13. Impact of ALICE participation on STAR

  14. Summary of RNC at STAR and ALICE • ALICE: • EMCal project provides unique opportunity for highly visible, high impact new program that is fully consistent with RNC physics accomplishments and interests •  targeted, limited effort focused on EMCal and its related physics • STAR:RNC participation will evolve in next ~3 years: • Expanded effort on STAR tracking upgrades • Correspondingly reduced STAR analysis effort • Current high pT group will migrate to ALICE by 2008 • STAR jet physics and hard process analyses will be carried out by the existing “Soft Physics” group

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