American LC Physics/Detector Studies

Jim Brau, Prague, November 17, 2002

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Jim BrauUniv. of Oregon

November 17, 2002

American LC Physics/Detector Studies

• 2002 has been a very active year for LC physics and detector studies in North America

• Plans for invigorated R&D effort with hardware development, including LC accelerator R&D at the universities


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US LC Steering Group established

• Establishment recommended by the HEPAP Subpanel on Long Range Planning.

• membership:– Dorfan (chair), Tigner, Witherell … lab directors– Brau, Oreglia … ALCPG– D. Burke (SLAC), S. Holmes (FNAL), G. Dugan(Cornell) …

machine– J. Bagger, S. Dawson … outreach– J. Friedman, Y-K. Kim, D. Marlow

CHARTER (1st paragraph)

• The U.S. Linear Collider Steering Group leads universities and national laboratories working toward U.S. participation in an international high-energy, high-luminosity, electron-positron linear collider wherever it is built and preparing elements of a bid to host the project in the U.S.


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Reorganization of Physics and Detectors Working

Groups• HEPAP report inspired new energy in North American Linear

Collider effort

• Charlie Baltay and Paul Grannis stepped down after several years

of excellent leadership – Jim Brau, Mark Oreglia co-chairing ALCPG, Executive Ctte:

– Ed Blucher (Chicago) Dave Gerdes (Michigan)– Lawrence Gibbons (Cornell) Dean Karlen (Victoria)– Young-Kee Kim (Berkeley) Jeff Richman (UCSB)– Rick Van Kooten (Indiana) Hitoshi Murayama (Berkeley)

• The “old” NA WGs were reviewed • minor changes in leadership• establish LHC/LC study group (following ECFA/DESY)• liaison to accelerator R&D


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New

Working Groups

Detector and Physics Simulations: N. Graf/M. Peskin

Vertex Detector: J. Brau /N. Roe

Tracking:B. Schumm/D. Karlen/K. Riles

Particle I.D.:B. Wilson

Calorimetry:R. Frey/A. Turcot/D. Chakraborty

Muon Detector: G. Fisk

DAcq, Magnet, and Infrastructure:(inactive)

Interaction Regions, Backgrounds: T. Markiewicz/S. Hertzbach

IP Beam Instrumentation: M. Woods /E. Torrence/D. Cinabro

Higgs: R. Van Kooten/M. Carena/H. Haber

SUSY: U. Nauenberg/J. Feng /F. Paige

New Physics at the TeV Scale and Beyond:J. Hewett/D. Strom/S. Tkaczyk

Radiative Corrections (Loopverein): U. Baur/S. Dawson/D. Wackeroth

Top Physics, QCD, and Two Photon: Lynne Orr/Dave GerdesPrecision Electroweak:

Graham Wilson/Bill Marciano

gamma-gamma, e-gamma Options: Jeff Gronberg/Mayda Velasco

e-e-: Clem Heusch

LHC/LC Study Group - chaired by H. Schellman/F. Paige

Liaison to accel. R&DT. Himel, D. Finley, J. Rogers

http:blueox.uoregon.edu/~lc/alcpg

New

New

Split

Merged

Merged

Co-chairs: Jim Brau and Mark Oreglia

UCLC and LCRDD. Amidei, G. Dugan, G. Gollin, J. Jaros, A. Kronfeld, U. Mallik,R. Patterson, J. Rogers

New

Global Detector NetworkM. Hildreth/R. Van Kooten

New


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First Coordinated Study ofALCPG Working Groups

PHYSICSWhat are the value, priority, and

importance to the physics program of the LC performance options. We are considering issues such as:

initial and eventual energy reach integrated luminosity positron polarization how much is needed/useful gamma-gamma collisions electron-gamma collisions electron-electron collisions

More detailed issues energy luminosity spectrum beam bunch structure

other collider parameters

DETECTORSWhat are the impact of the

accelerator parameters on detector performance?

Investigating luminosity backgrounds beam bunch structure calibration (Z peak

running) other relevant collider

parameters

Specify priorities for R&D. Study requested by USLCSG

Draft report in November


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Recent Meetings and Workshops

• Regional R&D MeetingsFermilab (Apr 5) Cornell (Apr 19) SLAC (May 31)

• LoopVerein BNL May 9-10• IP Beam Inst. SLAC June 26• ALCPG Santa Cruz June 27-

29• LCDsoft NIU Nov 7-9• collider

workshop SLAC Nov 21-22• LHC/LC Fermilab Dec 12-13• ALCPG U Tex-ArlingtonJan 9-11

(Int’l R&D reports -vxd and intmd-trk -Jan 8)


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Santa Cruz Goals

– First meeting since reorganization• 132 registrants

– 7 from Europe– 4 from Asia

Physics and Detector Working Groups had very busy program of talks and discussions

Fourth day was devoted to planning for R&D proposals (UCLC and LCRD)


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IP Beam Instrumentation WG

• New working group to concentrate on IP beam instrumentation– luminosity– energy – polarization

• Workshop at SLAC, June 26th


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LCDsoft


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Workshop on Low Energy Photon Collider Facilities

November 21 -22, 2002 at SLAC

• A workshop to examine the possibility and readiness of photon collider testbed facilities and evaluate their timescale and utility for the International LC project baseline definition.

http://www-conf.slac.stanford.edu/lepcf/

Photon Collider physics at a future LC

The potential for a low energy photon collider demonstration

Detailed discussions on the requirements for a photon collider demonstration at SLC

The possibility of photon collider experiments at sub-LC energies.


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Photon Collider Testbed Hardware

Tom Markiewicz

NLC - The Nex t Linear Co ll ider Projec t

Photon Collider Testbed Hardware ½ Scale prototype of optics / alignment system is currently

under construction

Beampipe

Alignment System


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The LHC/LC Study Group• ECFA/DESY Study established study group

• The aim of the LHC / LC Study Group is to investigate how analyses at the LHC could profit from results obtained at a LC and vice versa. It is furthermore studied how informations obtained at both machines can most effectively be put together in order to explore the mechanism of electroweak symmetry breaking, the underlying structure of SUSY theories, etc.

• First meeting at the ECFA/DESY LC Workshop, St. Malo, 12 - 15 April, 2002

• American working group led by Heidi Schellman & Frank Paige

• First meeting in N. American: December 12-13, Fermilab


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The Growth in R&D Plans & Proposals

• In January at the Chicago Workshop: – lots of new faces– New university interest in machine development!!!

• In the following weeks:– New groups formed to tie-in with labs, educate

themselves about opportunities and areas of need, join existing effort, and create proposals

– NSF precipitated the notion of consortium proposals (modelled on the muon collider R&D)

• Three regional meetings were held – Fermilab (Apr 5), Cornell (Apr 19), SLAC (May 31)


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US R&D Proposals• Regional meetings initiated proposal preparation

for an invigorated R&D effort (UCLC and LCRD)April 5 - Fermilab April 19 - Cornell May 31 - SLAC

• A single, combined proposal was developed over the summer and sent to DOE and NSF (October 24)

A University Program of Accelerator and Detector Research for the Linear Collider

– about 2 M$ next year (increasing in out years)– very strong accelerator R&D component

• (roughly 1/2 of total funding)

• International Detector R&D Committee report provided guidance for detector projects

• http://blueox.uoregon.edu/~lc/randd.html


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Linear Collider Accelerator R&D

• Many in the American university community are interested in linear collider accelerator R&D

• In response to this, the LC accelerator physicists prepared a list of R&D projects and the community developed proposals to address some

http://www-conf.slac.stanford.edu/lcprojectlist/projectlist/intro.htm

• 31 accelerator project proposals were submitted October 24

• The US funding agencies are expected to support many of these projects


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A University Program of Accelerator and Detector Research for the Linear Collider

2002 ProposalProposed

BudgetNo.

projects

Accelerator Physics $1,003,783 33Luminosity, Energy, Polarization $171,541 9Vertex Detector $119,100 3Tracking $395,662 11Calorimetry $514,540 12Muon system and Particle ID $148,899 3

TOTAL $2,353,525 71

In addition strong R&D effort continues in Canada

http://www.hep.uiuc.edu/LCRD/html_files/proposal.html


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ALCPG plan for reports

• Evaluate LC machine parameters and options (mentioned earlier) - high priority - draft soon

• White paper on Physics and Detector R&D– Int’l Detector R&D report

http://blueox.uoregon.edu/~lc/randd.html– working with Int’l comm. to complete web of links to WW

efforts

• White paper on the role of the LC during the LHC era (work of the LHC/LC study group)

• Physics and Detector “design manual” - what we know about the options, tradeoffs, performance– about summer 2004?– will this be world-wide?

Plan for “design manual” still being developed

done


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Future Meetings of the ALCPG• Plans are underway for the

next two ALCPG meetings during 2003– Next winter ( January 9-11)

• U Texas-Arlington (http://alcworkshop.uta.edu/index.php)– Jan 8 - Int’l review of VXD and intmed track– first discussion on GDN (M. Hildreth/R. VanKooten)

– Next summer• Cornell

• More frequent meetings of working groups between bi-annual ALCPG meetings

• Monthly continental televideo/teleconferences ten per year (begin December 12)


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IEEE Nuclear Science SymposiumPortland, Oregon Oct 19-24, 2003

• Conference series with long tradition for reports on high energy physics instrumentation

• papers published in IEEE Trans. on Nucl. Science

• Abstract and summaries due May 16, 2003http://www.nss-mic.org/2003/nsshome2003.html


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Conclusions American LC Physics and Detector

R&D

• There has been a significant spurt of activity in the N. American community during 2002

• We expect increased support for R&D in the coming year, making possible much increased detector hardware efforts


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Topics to be discussed include:

• Photon Collider physics at a future LC

• The potential for a low energy photon collider demonstration to increase confidence in the technical feasability of a photon collider facility at a future LC.

• Detailed discussions on the requirements for a photon collider demonstration at SLC including:

– Laser and Optics hardware.– Current status of SLC and requirements for its revival.– Observation of gamma-gamma luminosity using SLD or other detectors.

• A roundtable discussion of the timescales for decisions about the project scope of a future LC and whether a photon collider test facility can have an impact on those decisions.

• The possibility of photon collider experiments at sub-LC energies.

Workshop on Low Energy Photon Collider Facilities

November 21 -22, 2002


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Radiative Corrections (Loopverein)

• In recognition of the unprecedented level of precision at the Linear Collider, theoretical predictions will require the highest level of precision

• The American group hosted a meeting at Brookhaven, May 9-10

• Work to ensure our measurements are not unnecessarily limited by theory is well under way

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American LC Physics/Detector Studies