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The mass-hierarchy and CP-violation discovery reach of the LBNO long-baseline neutrino experiment

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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
Published in
Journal of High Energy Physics
Authors
LAGUNA-LBNO Collaboration
Date
2014
Discipline
FysiikkaPhysics
Copyright
© 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. ...
Publisher
Springer
ISSN Search the Publication Forum
1126-6708
Keywords
oscillation neutrino detectors CP violation kaukoputket ja teleskoopit

Original source
http://link.springer.com/article/10.1007%2FJHEP05%282014%29094

DOI
https://doi.org/10.1007/JHEP05(2014)094
URI

http://urn.fi/URN:NBN:fi:jyu-201409172807

Publication in research information system

https://converis.jyu.fi/converis/portal/detail/Publication/23838784

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