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Precision Measurement of sin² theta_W at a Reactor

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arxiv hep-ex/0403048 v4 pith:XGLSE4ZW submitted 2004-03-29 hep-ex

Precision Measurement of sin² theta_W at a Reactor

classification hep-ex
keywords thetaerrormeasurementreactor-basedabsoluteachievedantineutrinoantineutrinos
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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This paper presents a strategy for measuring sin^2 theta_W to ~1% at a reactor-based experiment, using antineutrinos electron elastic scattering. This error is comparable to the NuTeV, SLAC E158, and APV results on sin^2 theta_W, but with substantially different contributions to the systematics. An improved method for identifying antineutrino proton events, which serve both as a background and as a normalization sample, is described. The measurement can be performed using the near detector of the presently proposed reactor-based oscillation experiments. We conclude that an absolute error of delta(sin^2 theta_W)=0.0019 may be achieved.

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