The mass-hierarchy and CP-violation discovery reach of the LBNO long-baseline neutrino experiment
LAGUNA-LBNO Collaboration. (2014). The mass-hierarchy and CP-violation discovery reach of the LBNO long-baseline neutrino experiment. Journal of High Energy Physics, 94(5), Article 094. https://doi.org/10.1007/JHEP05(2014)094
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Journal of High Energy PhysicsAuthors
Date
2014Copyright
© The Authors. Article funded by SCOAP3
The next generation neutrino observatory proposed by the LBNO collaboration
will address fundamental questions in particle and astroparticle physics. The experiment
consists of a far detector, in its first stage a 20 kt LAr double phase TPC and a magnetised
iron calorimeter, situated at 2300 km from CERN and a near detector based on a highpressure
argon gas TPC. The long baseline provides a unique opportunity to study neutrino
flavour oscillations over their 1st and 2nd oscillation maxima exploring the L/E behaviour,
and distinguishing effects arising from CP and matter.
In this paper we have reevaluated the physics potential of this setup for determining the
mass hierarchy (MH) and discovering CP-violation (CPV), using a conventional neutrino
beam from the CERN SPS with a power of 750 kW. We use conservative assumptions on
the knowledge of oscillation parameter priors and systematic uncertainties. The impact
of each systematic error and the precision of oscillation prior is shown. We demonstrate
that the first stage of LBNO can determine unambiguously the MH to > 5 C.L. over the
whole phase space. We show that the statistical treatment of the experiment is of very high
importance, resulting in the conclusion that LBNO has 100% probability to determine
the MH in at most 4-5 years of running. Since the knowledge of MH is indispensable to
extract CP from the data, the first LBNO phase can convincingly give evidence for CPV
on the 3 C.L. using today’s knowledge on oscillation parameters and realistic assumptions
on the systematic uncertainties.
...
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SpringerISSN Search the Publication Forum
1126-6708
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http://link.springer.com/article/10.1007%2FJHEP05%282014%29094Publication in research information system
https://converis.jyu.fi/converis/portal/detail/Publication/23838784
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