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Updated fit to three neutrino mixing: status of leptonic CP violation
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
Number of Authors: 32014 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 11, article id 052Article in journal (Refereed) Published
Abstract [en]

We present a global analysis of solar, atmospheric, reactor and accelerator neutrino data in the framework of three-neutrino oscillations based on data available in summer 2014. We provide the allowed ranges of the six oscillation parameters and show that their determination is stable with respect to uncertainties related to reactor neutrino and solar neutrino flux predictions. We find that the maximal possible value of the Jarlskog invariant in the lepton sector is 0.033 +/- 0.010 (+/- 0.027) at the l sigma (3 sigma) level and we use leptonic unitarity triangles to illustrate the ability of global oscillation data to obtain information on CP violation. We discuss tendencies and tensions of the global fit related to the octant of theta 23 as well as the CP violating phase delta cp. The favored values of (delta cp are around 3 pi/2 while values around pi/2 are disfavored at about Delta chi(2) similar or equal to 6 . We comment on the non-trivial task to assign a confidence level to this Delta chi(2) value by performing a Monte Carlo study of T2K data.

Place, publisher, year, edition, pages
2014. no 11, article id 052
Keywords [en]
Neutrino Physics, Solar and Atmospheric Neutrinos
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-160577DOI: 10.1007/JHEP11(2014)052ISI: 000345086500001OAI: oai:DiVA.org:su-160577DiVA, id: diva2:1254155
Available from: 2018-10-08 Created: 2018-10-08 Last updated: 2018-10-08Bibliographically approved

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Matoni, MicheleSchwetz, Thomas
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