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Neutrino Factory/Muon Collider Document 301-v1

Neutrino Factory and Beta Beam Experiments and Development

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MuCool Note
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John Urish
Updated by:
John Urish
Document Created:
10 Nov 2004, 12:00
Contents Revised:
10 Nov 2004, 12:00
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10 Nov 2004, 12:00
Actually Revised:
14 Sep 2006, 13:35
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Neutrino Factory and Beta Beam Experiments and Development

C.~Albright, V.~Barger, J.~Beacom, J.S.~Berg, E.~Black,
A.~Blondel, S.~Brice, S.~Caspi, W.~Chou, M.~Cummings,
R.~Fernow,D.~Finley, J.~Gallardo, S.~Geer,
A.~Jansson,C.~Johnstone,S.~Kahn, D.~Kaplan,
H.~Kirk, T.~Kobilarcik, M.~Lindner, K.~McDonald,
O.~Mena, D.~Neuffer, V.~Palladino, R.~Palmer, K.~Paul,
P.~Rapidis, N.~Solomey, P.~Spampinato, Y.~Torun,
K.~Whisnant, W.~Winter, M.~Zisman
The Neutrino Factory and Muon Collider Collaboration.

The long-term prospects for fully exploring three-flavor mixing in the neutrino sector depend upon an ongoing and increased investment in the appropriate accelerator R\&D. Two new concepts have been proposed that would revolutionize neutrino experiments, namely the Neutrino Factory and the Beta Beam facility.
These new facilities would dramatically improve our ability to test the three-flavor mixing framework, measure \textsl{CP} violation in
the lepton sector, and perhaps determine the neutrino mass hierarchy, and,
if necessary, probe extremely small values of the mixing angle $\theta_{13}$.
The stunning sensitivity that could be achieved with a Neutrino Factory is
described, together with our present understanding of the corresponding
sensitivity that might be achieved with a Beta Beam facility. In the Beta Beam case,
additional study is required to better understand the optimum Beta Beam
energy, and the achievable sensitivity. Neither a Neutrino Factory nor
a Beta Beam facility could be built without significant R\&D. An impressive Neutrino
Factory R\&D effort has been ongoing in the U.S. and elsewhere over the
last few years and significant progress has been made towards optimizing
the design, developing and testing the required accelerator components,
and significantly reducing the cost. The recent progress is described here.
There has been no corresponding activity in the U.S. on Beta Beam facility design and,
given the very limited resources, there is little prospect of starting
a significant U.S. Beta Beam R\&D effort in the near future. However, the
Beta Beam concept is interesting, and progress on its development in Europe should be followed. The Neutrino Factory R\&D program has reached a critical stage in which support is required for two crucial international experiments
and a third-generation international design study. If this support is
forthcoming, a Neutrino Factory could be added to the Neutrino Community's
road map in about a decade.
Revised version:
Additional references has been added in section 4.
Minore typos have been corrected.

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The Neutrino Factory and Muon Collider Collaboration and additional collaborators
Publication Information:
Report of the Neutrino Factory and Beta Beam Experiments and Development Working Group, part of the DNP/DPF/DAP/DPB Joint Study on the Future of Neutrino Physics. (2004)
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