High-energy On-site Accelerator Based Options

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High-energy On-site Accelerator Based Options

• Bruce Schumm
• UC Santa Cruz
• July 11 2003 SLUO Meeting

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Z FACTORY OPTIONS
Very rough

• SOME NOTES
• ALR statistics saturate at 100 MZ with- out
  positron polarization and mt from the LC
• Some of B physics program is unique
• Significant second-tier physics program

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Z-Factory Considerations
Giga-Z Pros
Giga-Z Cons

• Not cheap (?1B)
• Been there, done that
• ALR saturates at 100 MZ
• Inefficient use of overall LC resources

• sin2?W to .00005 (no posipol), 0.000015 if
  posipol
• Improve Ab(x20) Rb (x6) address current
  anomaly
• LC testbed if warm technology is chosen
• Potential interim LC com- munity project
• Some unique contributions in B physics

• What about 2x1032 (50 MZ/yr)?
• Full reduction of sin2?W error
• Ab better by x5-10, Rb by x5
• Bs mixing, other special B topics (?)
• A bargain at 0.1B - 0.25B

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Higgs Shoppe

• Good Things
• Its the HIGGS!!
• Loop involves anything charged that couples to
  Higgs
• Testbed for ??

2x1033 ? 20 fb-1 yr-1 (Geometric
Luminosity) Translates to 1K-2K ???H yr-1

• Not-so Good Things
• Cost roughly 1B
• When do we find out if Higgs is really there?
• Demands high gradient (80 vs. 65 MeV/m for
  mH160
• Limited electroweak sample for other physics

??? to ? 5-25 depending on MH, running time
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Note Studies for CLICHE, 20x SLAC ??H Luminosity
1-2 ?
4-5 ?
LHC WEDGE
???(meas)/ ???(SM)
?WW(meas)/ ?WW(SM)
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Low-Energy ?? Option

• For 0.3B
• Premier ?? facility two-? x-section, photon
  structure, B physics, had-ronic physics,
  polarized charm pro-duction
• Interest in nuclear physics com-munity?
• For 0.01B
• Demonstrate some aspects of ?? technology

Would be premier ?? facility 2010