Sterile neutrino oscillations in MINOS and hadron production in pC collisions Page: 54 of 237
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2.4 Experimental evidence
and the CP (violating) phase 6. In particular there are two classes of experiments. The
first type are reactor experiments: Double Chooz , Daya Bay  and Reno , whose
goal is to measure or constrain 013 through the survival probability for F,. The second class
of experiments are off-axis beam long baseline experiments: T2K and NovA. By moving
the far detector to be slightly away from the centre of the beam, neutrino energies are less
dependent on the parent pion momentum, limiting the impact of the uncertainty in the
secondary hadron production. The T2K experiment, which will employ SK as far detector,
will have a baseline of 295 km and mean neutrino energy of 600 MeV. The experiment will
have two near detectors: one on-axis and one off-axis. The goal is to extract flux information
and background information (mainly r0 produced in NC interactions that can fake signal
v6). The two near detectors are significantly different in characteristics with SK; however
the off-axis near detector will have a water target to extract ir0 production cross section
in water. Apart from improving the atmospheric neutrino oscillation parameters sin2 023
and IAm321 by looking at v, -- v1, processes, T2K will primarily look at the sub-dominant
oscillations v1, -- v,.
The NOvA experiment is designed to pursue the same physics program as T2K, but it
is also more sensitive to matter effects, given the longer baseline of 810 km. NOvA will use
two functionally identical tracking liquid scintillator calorimeters as near and far detector.
NOvA will look at v1, disappearance and at v1, -- v, results. Following the arguments
in , experiments like T2K and NOvA will experience two competing effects in the
probability P(v, -- v,): the presence of the CP violating phase (arising from the three-
flavour oscillation probability) and the matter effects that can mimic one another. Some
information from external experiments needs to be introduced to resolve the ambiguity
between the apparent CP phase measured and matter effects. Far future experiments, like
DUSEL or T2KK (still at the design stage), will have an even longer baseline in order to
reach the second maximum of the oscillation probability where the effect of 6 and matter
effects can be disentangled.
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Tinti, Gemma Maria & U., /Oxford. Sterile neutrino oscillations in MINOS and hadron production in pC collisions, thesis or dissertation, July 1, 2010; Batavia, Illinois. (https://digital.library.unt.edu/ark:/67531/metadc1015233/m1/54/: accessed April 26, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.