Abstract
A neutrino factory has unparalleled physics reach for the discovery and measurement of $CP$ violation in the neutrino sector. A far detector for a neutrino factory must have good charge identification with excellent background rejection and a large mass. An elegant solution is to construct a magnetized iron neutrino detector (MIND) along the lines of MINOS, where iron plates provide a toroidal magnetic field and scintillator planes provide 3D space points. In this paper, the current status of a simulation of a toroidal MIND for a neutrino factory is discussed in light of the recent measurements of large ${\ensuremath{\theta}}_{13}$. The response and performance using the 10 GeV neutrino factory configuration are presented. It is shown that this setup has equivalent ${\ensuremath{\delta}}_{CP}$ reach to a MIND with a dipole field and is sensitive to the discovery of $CP$ violation over 85% of the values of ${\ensuremath{\delta}}_{CP}$.
Highlights
The neutrino factory is a new type of accelerator facility in which a neutrino beam is created from the decay of muons in flight in a storage ring
The e ! oscillation [2], identified through the so-called ‘‘golden channel’’ in which the charged current interactions of the produce muons of the opposite charge to those stored in the storage ring [3], is the most promising channel to explore CP violation at a neutrino factory
Mass hierarchy discovery potential is achieved for all values of 13 in which sin2213 > 10À4, a neutrino factory will be sensitive to the mass hierarchy for the currently measured value of 13
Summary
The neutrino factory is a new type of accelerator facility in which a neutrino beam is created from the decay of muons in flight in a storage ring. This facility can be used to study neutrino oscillations in a variety of oscillation channels [1] and can be used to determine the neutrino mass hierarchy, whether the mass squared difference between neutrino mass eigenstates Ám213 is positive or negative (inverted or normal mass hierarchy), and CP violation in the neutrino sector. The far detector at a neutrino factory [6] requires excellent reconstruction and charge detection efficiency These capabilities are best encompassed using a large magnetized iron neutrino detector (MIND). The MIND is optimized to exploit the golden channel oscillation as this has an identified signal; a muon with a sign opposite to that in the muon storage ring.
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