Oscillation physics at the Neutrino Factory

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Oscillation physics at the Neutrino Factory

• Contribution of this working group to the ECFA
  Neutrino Factory Yellow Report

Mario Campanelli-Geneva
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The context

• This working group, like others, has been
  established under a two-year mandate from ECFA to
  establish the feasibility and the impact of a
  Neutrino Factory as a future machine for CERN. A
  large consensus emerged among the groups that the
  results of the study should result in a
  publication as CERN yellow report, as already
  happened for
• Perspective study of muon storage rings at CERN
• CERN 99-02
• ECFA 99-197

• This work contained three parts
• Step 1 Neutrino Factory
• Step 2 Higgs Factory
• Step 3 High-energy frontier

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The old yellow report

• Looked with present eyes, the 99 YR (written
  before NuFact 99 in Lyon!) looks really
  outdated. The Neutrino Factory section was 30
  pages long, including oscillation-and non
  oscillation physics.
• In the oscillation section, very few topics are
  presented, there is no serious analysis of matter
  effects nor CP violation (only general
  asymmetries given), no study of SuperBeams etc.
• Since then, we had 4 NuFact conferences, and
  hundreds of papers on this topic, a good fraction
  of them originated in the context of this working
  group.
• All this work had to be summarized and collected
  to show the existence of a very active community
  in the field

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Other working groups
We know that many physics studies can benefit
from a Neutrino Factory several working groups
were created to work around specific topics.

• Almost all other groups have completed their
  studies
• The Study of a Eutopean Neutrino Factory at CERN
  (still a draft) http//nicewww.cern.ch/molat/neut
  rino/nf103.pdf CERN Nufact note 103
• Physics with Low-Energy Muons at a Neutrino
  Factory Complex J. Aysto et al, hep-ph/0109217
  http//xxx.lanl.gov/pdf/hep-ph/0109217
• High intensity neutrino physics Physics at the
  front-end of a neutrino factory a quantitative
  appraisal M. Mangano et al, CERN-TH/2001-131,
  hep-ph/0105155
• http//arXiv.org/abs/hep-ph/0105155
• Kaon physics with a high-intensity proton driver
  G. Buchalla et al, hep-ph/0107046
  http//arXiv.org/ps/hep-ph/0107046
• Physics Opportunities at mumu- Higgs Factories
  C. Blochinger et al, hep-ph/0202199
  http//xxx.lanl.gov/pdf/hep-ph/0202199

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What about us?

• The work on this document started after Easter,
  putting together work done by various people. A
  first draft was ready and announced before
  NuFact02, then new ideas coming from that
  conference were also included.

Three weeks ago, a final draft was circulated,
with call for comments and authors
We want to close the paper by today! I.e., I will
send it to hep-ph after this meeting!
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Main goals of the document

• Serve as reference point for neutrino oscillation
  formulae in our region of interest
• Provide updated experimental results and
  theoretical models for neutrino oscillations
• Illustrate potentialities and limits of
  SuperBeams, with emphasis on updated SPL-gtFrejus
  option
• Describe machine aspects and physics of
  BetaBeams, and Beta-SuperBeam combination
• Assess the critical points of the Neutrino
  Factory machine from the point of view of the
  physics
• Treat in a logical and complete way the physics
  capabilities of the Neutrino Factory, with
  emphasis on oscillation studies performed in this
  group

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Organization of the document

• Introduction
• Theory (oscillations and beyond), present
  experimental results
• Neutrino beams from pion decay
• Beta-beams
• Neutrino Factory
• Conclusions

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Index
J.Ellis, A.deGouvea, M.Lola
M.Campanelli
M.Campanelli, JJ. Gomez, M.Velasco
M.Mezzetto, M.Campanelli, M.Fechner
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Index
P.Zucchelli, M.Mezzetto D.Casper

• A.Blondel

A.Cervera, M.Bonesini, S.Navas, P.Migliozzi
M.Campanelli
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Index
M.Campanelli, M.Laveder

• J.Ellis, A.Blondel

Thanks to JJ. Gomez and J.Ellis for careful
reading
Authorlist has been open not only to those who
provided a written contribution, but also to all
members of the working group
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Location

• The paper has been developed in a public area
• /afs/cern.ch/user/m/mcampan/public/tex/yrep
• with final files main.ps and main.pdf
• Also accessible from
• http//www.cern.ch/campanel

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Conclusions

• Finally, we have a document summarizing the work
  done in the last years about the main physics
  motivations to build a Neutrino Factory
• It ended up being a collection of studies about a
  large spectrum of new neutrino experiments,
  including a detailed discussion of Super- and
  Beta- Beams
• Many thanks to all who made this work possible
  with their contributions, comments etc.

• I hope this effort will help in making our case
  stronger, show the vitality of the community, and
  improve the understanding of the importance of
  this machine