The Role of the LHC in US HEP

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The Role of the LHC in US HEP

• Dan Green
• US CMS Program Manager
• January 28, 2003

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Outline

• US LHC - Physics and Technology
• US Construction Projects - Leadership
• US LHC Planning for the Physics The Research
  Program (RP)
• SoftWare and Computing (SWC)
• Maintenance and Operations (MO)
• LHC Long Term Program LHC Upgrades and Physics
  Reach.

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LHC Physics - Priority
HEPAP Subpanel on Long Range Planning Report puts
a high priority on the Physics of the LHC (all
quotes in this talk are from the Subpanel Report).
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LHC - SM Higgs
The LHC detectors are designed to find the SM
Higgs. Low mass is covered by ??, ttH(bb),
qqH(WW,??). A low mass Higgs has many
accessible decay modes ? couplings measured.
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LHC - SUSY
HEPAP Subpanel Report recognizes the importance
of the SUSY search at LHC. Mass coverage up to
3 TeV -gt either prove or disprove SUSY
hypothesis. Energy matters! One month at 1/10
design luminosity extends mass reach by a
lot. LHC experiments must be ready on week one
for new Physics.
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LHC Computing Grids
The IT tools developed for LHC physics analysis
are and will be vital to the advancement of
global science. Grid computing will make a major
impact in many areas of business and commerce.
The leading role of LHC was recognized in the
HEPAP Subpanel Report.
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US and the LHC Accelerator
HEPAP Subpanel Report recognizes that LHC
accelerator work in the US (BNL, FNAL, and LBNL)
sustains the enabling technology of future
accelerators.
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US LHC Education and Outreach
US LHC is very active in Education and Outreach
work. Examples are Research Experience for
Undergraduates (REU), Research Experience for
Teachers (RET) , and Quarknet (third year, 36
centers in the US)
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US Role in the LHC Program

• The US is investing 531 M, plus the efforts of
  many talented HEP physicists, in the LHC. The NP
  community may soon join.
• US physicists have achieved leadership roles in
  detector construction (e.g. R. Loveless CMS
  ME), software and computing (e.g. D. Stickland
  CMS SWC), and high- field superconducting
  quadrupole construction.
• It is essential to capitalize on that investment
  by ensuring that US physicists also play a
  leadership role in the analysis and publication
  of LHC data.

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US Leadership in ATLAS, CMS
HEPAP Subpanel Report recognizes US leadership
and the need to sustain it during the Research
program.
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US LHC Construction Projects
The 531 M investment has been wisely used. The
Projects are on schedule (for 2005 completion)
and on budget. The US LHC Projects are
progressing steadily toward completion.
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U.S. ATLAS Institutions
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Scientific Effort on ATLAS
US ATLAS effort will ramp up by a factor 2 by
FY07 in anticipation of first LHC beam
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US CMS387 Members from 38 Institutions
The US community is about 20 of the entire LHC
collaborations and is the largest single country
within the collaborations. The US LHC
collaborations are large and will continue to
grow as the time for first beam approaches.
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US LHC and the RP
US CMS has made a survey of intent. It appears US
CMS will grow by a factor 2 by FY07. In
addition, new groups will join before first beam.
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LHC and US Demographics
There are 2000 HEP physicists (DOENSF), 1500
experimenters. US LHC is presently 300 and
would need to redirect to 600 grad students
postdocs faculty. The US LHC community will be
a substantial fraction of US HEP accelerator
based experimenters by first beam.
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Planning for the Physics

• The LHC schedule has slipped 2 years. The US
  has maintained its schedule to complete in
  2005.
• SWC has already begun because U.S. physicists
  contribute to insure participation in the
  physics. The involvement is driven by the desire
  to do physics on day 1. In addition, considerable
  time is required to create and deploy the new,
  absolutely necessary Grid architecture.
• MO has begun as needed in order to commission
  detector and accelerator systems built and
  delivered by the US. Again, we want to
  commission the detector to be ready for physics
  (for example a SUSY search) immediately after
  beam arrives.

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LHC Physics in the US
In US CMS, planning is in place for a
collaboratory or virtual laboratory. Elements
are Virtual Control Room (commissioning, shifts)
and Physics Analysis Center ( teleconf, analysis
groups). This support goes directly and solely to
US HEP physicists.
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US CMS MO Estimated Personnel Needs
Note the roll off of construction and the ramp up
of MO starting in FY05.
BaBar Reality check eng techs
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US ATLAS - Tier 1 Facility Staffing
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US LHC AcceleratorBNL FNAL - LBNL
The Construction Project is completing. The
collaboration proposes to apply their expertise
to LHC machine commissioning. Also they propose
to develop Upgrades to extend the performance and
physics reach of the LHC. These efforts give
forefront research opportunities to US
accelerator physicists and possibilities to
extend US leadership in state-of-the art-
accelerator technology, e.g. SC magnets.
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US LHC Accelerator Research Program (RP)

• The US national labs have made a significant
  investment in and are making a significant
  contribution to the construction of the LHC.
• Leadership in IR design and construction
• Boost to accelerator technology at US labs.
• We should exploit and extend this investment by
  continuing the collaboration with CERN into
  commissioning, operating, and doing RD for
  upgrades for the LHC program.

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US LHC Accelerator RP

• The RP includes design of new IR for a high
  luminosity upgrade of LHC.
• The US labs are uniquely positioned to take an
  early lead in RD for high performance Nb3Sn
  quads.
• The quads to be delivered in 2005 were designed
  in 1995. For a 2015 installation, design and RD
  should begin no later than 2005 and be complete
  by 2011.

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U.S. ATLAS Research Program
US ATLAS has made resource loaded schedules for
MO, SWC, and Upgrade RD. That planning leads to
the US ATLAS RP Needs shown. The current cost
estimates exceed the funding guidance or budget
authority - from DOE and NSF (BA) shown for
comparison.
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Cost Estimates for the RP
The US LHC community has carefully estimated and
scrubbed the costs for the Research Program. The
US ATLAS US CMS Accelerator community
estimate that more than 80 M support is needed
in FY07 and beyond. Present planning within the
guidance provided in the Budget Authority delays
RD for upgrades, slows the SWC ramp up, and
reduces the contingency fund to a level which
limits management agility.
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HEP Funding
DOE HEP funding is constant at 700 AY M. The
US LHC community, a large fraction of all US HEP
accelerator based physicists, requests of DOE
25 25 10 AYM for US ATLAS, US CMS and the
LHC Accelerator RP. From NSF the estimate is 10
10 0 AYM. Clearly the LHC is a great bargain.
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Research Program - Upgrades
HEPAP Subpanel Report gives strong support to LHC
Upgrades. The present Budget Authority makes
strong Upgrade RD impossible in a timely
fashion. Note that an upgrade is a very cost
effective way to maximize the Physics output of
the pre-existing LHC complex
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LHC Upgrades
The guidance or Budget Authority - on RP
funding means we must delay Upgrade RD.
Additional U.S. funds will also be needed after
the RD to upgrade the LHC and its detectors if
the U.S. is to provide its appropriate share.
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P5 and the LHC RP
Construction Projects
Research Program
P5
RD in support of Upgrades
Prepare TDR for major Upgrade of LHC and/or
detectors
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LHC Physics and Upgrade
In general mass reach is increased by 1.5 TeV
(25 ) for Z, heavy SUSY squarks or gluinos or
extra dimension mass scales. A 20 measurement
of the HHH coupling is possible for Higgs masses
from 150 to 200 GeV. However, to realize these
improvements we need to launch the necessary
accelerator RD and maintain the capabilities of
the LHC detectors by upgrading them in a modest
fashion.
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Summary

• The Physics program available at the LHC is
  absolutely first class with discovery potential
  and precision measurements possible.
• The technical edge given by advanced detectors,
  high field magnets and grid computing enables the
  LHC program and its US participants to stay on
  the frontier of our science.
• US physicists are in leadership positions in the
  LHC. This is made possible by the DOE/NSF
  investment.
• The gains realized from US investment are, and
  will continue to be, a great bargain.
• In order to realize that benefit, there must be
  sustained attention to the Research Program.
  Strong participation in the Physics analysis and
  Upgrades are crucial if the US is to maintain its
  leadership.