Absolute neutrino masses
• Neutrinoless double beta decay: m ee = ∑ i U 2 ei m i < ∼ 1.0 eV
(=0.1-0.9 eV)? (Klapdor-Kleingrothaus et al. 2004)
→ test by next generation experiments
d
d
W
Uei
ν=ν
U
ei
W
P
L
u
e
m i +q
q
2−m P
e
u
2 L
i
Summary: neutrino mass spectrum
m 1 = 0 - 0.3 eV
m 2 = 0.007 - 0.3 eV
m 3 = 0.01 - 0.3 eV
(0.1-0.3 eV)
(0.1-0.3 eV)
(0.1-0.3 eV)
H.V. Klapdor-Kleingrothaus, H. Päs, A.Y. Smirnov Phys. Rev. D 63 (2001) 073005
H. Päs, T.J. Weiler, Phys. Rev. D 63 (2001) 113015
Heinrich Päs (TU Dortmund) Neutrinos & new physics Oxford 2008
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