Physics with near detectors at a neutrino factory

Details Physics with near detectors at a neutrino factory Physics with near detectors at a neutrino factory

2009-03-18

arxiv.org/abs/0903.3039v2

Phys.Rev.D80:053001,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

32 pages, 13 figures, 4 tables. Minor changes, clarifications added. Version to appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.80.053001

We discuss the impact of near detectors at a neutrino factory both on standard oscillation and non-standard interaction measurements. Our systematics treatment includes cross section errors, flux errors, and background uncertainties, and our near detector fluxes include the geometry of the neutrino source and the detector. Instead of a specific detector concept, we introduce qualitatively different classes of near detectors with different characteristics, such as near detectors catching the whole neutrino flux (near detector limit) versus near detectors observing a spectrum similar to that of the far detector (far detector limit). We include the low energy neutrino factory in the discussion. We illustrate for which measurements near detectors are required, discuss how many are needed, and what the role of the flux monitoring is. For instance, we demonstrate that near detectors are mandatory for the leading atmospheric parameter measurements if the neutrino factory has only one baseline, whereas systematical errors partially cancel if the neutrino factory complex includes the magic baseline. Finally, near detectors with nu_tau detection are shown to be useful for non-standard interactions.

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