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10-15 August 2015
Centro Brasileiro de Pesquisas Físicas
Brazil/East timezone

Constraining Majorana CP Phase in Precision Era of Cosmology and Double Beta Decay Experiment

Not scheduled
Ministro João Alberto Lins de Barros auditorium (Centro Brasileiro de Pesquisas Físicas)

Ministro João Alberto Lins de Barros auditorium

Centro Brasileiro de Pesquisas Físicas

Rua Dr. Xavier Sigaud 150 Urca - Rio de Janeiro - RJ BRAZIL
Poster Working group 1: Neutrino Oscillation Physics


Dr Alexander Quiroga (PUC-Rio)


We show that precision measurement of sum of neutrino masses by cosmological observation and efective neutrino mass by neutrinoless double beta decay, together with beta decay experiments, have a synergy which allows us to get information on the Majorana phase of neutrinos. In order to quantify this information, we use, in addition to the allowed region plots, the CP exclusion fraction function as a complementary tool. This function shows how much fraction of the CP phase parameter space can be excluded for a given set of assumed inputs parameters. We find that one of the two CP neutrino phases can be constrained by excluding 10-50% of the phase space at 3σ CL for the lowest neutrino mass of 0.1eV. We also consider if the nuclear matrix element can be constrained by consistency of such measurements.

Primary author

Dr Alexander Quiroga (PUC-Rio)


Dr Hiroshi Nunokawa (Department of Physics, Pontificia Universidade Catolica do Rio de Janeiro) Dr Hisakazu Minakata (University of São Paulo)

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