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Determination of the neutrino mass ordering by combining PINGU and Daya Bay II

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons73449

Blennow,  Mattias
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons31026

Schwetz-Mangold,  Thomas
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

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Volltexte (frei zugänglich)

1306.3988.pdf
(Preprint), 271KB

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Zitation

Blennow, M., & Schwetz-Mangold, T. (2013). Determination of the neutrino mass ordering by combining PINGU and Daya Bay II. Journal of high energy physics: JHEP, 2013(9): 89. doi:10.1007/JHEP09(2013)089.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0014-76CC-0
Zusammenfassung
The relatively large measured value of theta_13 has opened various possiblities to determine the neutrino mass ordering, among them using PINGU, the low-energy extention of the IceCube neutrino telescope, to observe matter effects in atmospheric neutrinos, or a high statistics measurment of the neutrino energy spectrum at a reactor neutrino experiment with a baseline of around 60 km, such as the Daya Bay II project. In this work we point out a synergy between these two approaches based on the fact that when data are analysed with the wrong neutrino mass ordering the best fit occurs at different values of |Delta m^2_31| for PINGU and Daya Bay II. Hence, the wrong mass ordering can be excluded by a mismatch of the values inferred for |Delta m^2_31|, thanks to the excellent accuracy for Delta m^2_31 of both experiments. We perform numerical studies of PINGU and Daya Bay II sensitivities and show that the synergy effect may lead to a high significance determination of the mass ordering even in situations where the individual experiments obtain only poor sensitivity.