Convener: Yori Nagashima OU

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Organization of Physics Working Group
Convener Yori Nagashima (OU) Council members
Debbie Harris (FNAL), Pilar Hernandez (UV),
Manfred Lindner (TUM), William Marciano (BNL),
Mauro Mezzetto (INFN), Liason w/ Detector Group
Hitoshi Murayama (LBL), Kenzo Nakamura (KEK)
Subgroup conveners S.King(USH)
Theoretical O.Yasuda(TMU) Phenomenological
K.Long(ICL) Experimental L.Roberts(UB)
Slow Muon
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• Neutrino factory is a Major facility
• close to LHC and ILC
• In its scale.
• Is the physics case equally strong?

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Mission of the theoretical subgroup Issue a
message to global community

• Describe the impact of the neutrino and related
  researches
• towards the understanding of the matter
  unification, the synergy of particle physics,
  astro-physics and cosmology.

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The neutrino opens the way to
many new frontiers
Super Beam
n factory
Courtesy Brian Foster NuFact02 Manfred Lindner
ISSWS05
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Mission of the phenomenological and
experimental subgroups

• 1st step
• Critical review of physics performance of future
  options
• Superbeam (SB)
• Beta beam (BB)
• Neutrino Factory (NF)
• On common base.
• Define strengths and weaknesses of each facility
• Perform critical comparisons

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NF always outperforms SB except for very large
values of sin22q13 gt0.01 (large uncertainties
from matter effect)

P.Huber et al., hep-ph/0412199
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Indicator for risk minimization of CP precision
measurement
P.Huber et al., hep-ph/0412199
CP coverage is a range of fitted values of dCP
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• 2nd Step
• Towards a consensus
• Identify the need for complementary measurement
• Make a scenario w/wo staging approach to achieve
  scientific goals
• Establish the physics case for (or against! ) a
  NF
• Outstanding questions
• Can we achieve precision to go beyond the
  standard 3-flavor oscillation scheme? ?Unitarity
  issue
• Is a NF needed if sin22q13 is large ?
• What is the minimum NF energy that will deliver
  the physics (cost issue)?

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Slow Muon Physics
Sensitive probe for SUSY
Muon facility Pre-requiste for NF. Should be
considered as one package
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SHEDULE

• Plenary Meetings and workshops
• 1 CERN September 23-25 (done)
• Phys. Workshop 1 Nov. 14-21 _at_ICL
• 2 KEK 23-25 January 2006
• Phys. Workshop 2 March 4-12(tbc)_at_Boston
• 3 RAL 27-29 April 2006
• 4 Irvine 21-23 August 2006 (just before
  NuFact06)

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