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Radiative corrections to the leptonic Dirac CP-violating phase

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons31207

Zhang,  He
Werner Rodejohann - ERC Starting Grant, Junior Research Groups, MPI for Nuclear Physics, Max Planck Society;

Externe Ressourcen
Volltexte (frei zugänglich)

1211.3153
(Preprint), 683KB

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Zitation

Ohlsson, T., Zhang, H., & Zhou, S. (2013). Radiative corrections to the leptonic Dirac CP-violating phase. Physical Review D, 87(1): 013012, pp. 1-12. doi:10.1103/PhysRevD.87.013012.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000E-F541-4
Zusammenfassung
Since the smallest leptonic mixing angle theta_{13} has been measured to be relatively large, it is quite promising to constrain or determine the leptonic Dirac CP-violating phase delta in future neutrino oscillation experiments. Given some typical values of delta = pi/2, pi, and 3pi/2 at the low-energy scale, as well as current experimental results of the other neutrino parameters, we perform a systematic study of the radiative corrections to delta by using the one-loop renormalization group equations in the minimal supersymmetric standard model and the universal extra-dimensional model. It turns out that delta is rather stable against radiative corrections in both models, except for the minimal supersymmetric standard model with a very large value of tan beta. Both cases of Majorana and Dirac neutrinos are discussed. In addition, we use the preliminary indication of delta = (1.08^{+0.28}_{-0.31}) pi or delta = (1.67^{+0.37}_{-0.77}) pi from the latest global-fit analyses of data from neutrino oscillation experiments to illustrate how it will be modified by radiative corrections.