1. April-June 2007

3. 1)Oscillations: 2)Kinematics in weak decays: 3) 0 double beta decay: ?

4. solar Kamland Kamland + solar

5. Favored channel:

6. Global fit to all existing data atmospheric, reactors (SBL) solar accelerators accelerators reactors (LBL)

7. To improve on T 12 0 and : need large source mass lower background, better event signature

8. beta decay: For more information: Commins and Bucksbaum, Weak interaction of leptons and quarks

12. Integral electrostatic spectrometer

13. Mainz frozen T 2 source,  E=4.8 eV Troitsk gaseous T2 source,  E=3.5 eV Reported anomaly most likely experimental artifact

14. Katrin (Karlsruhe) 23 m in final version

15. T 2 injection (27 K) 10 m start data taking 2010

16. Katrin, main spectrometer transport

17. Thermistor R(T) measure heat pulse Stopping particle (ionizing or non ionizing) phonons heat sink ( 8 mK) crystal i Wide choice of materials Good energy resolution Cryogenic detectors (bolometers)

18. 187 Re 187 Os + e - + e E 0 =2.5 keV, 43 Gyr, abundance 62.8 % Milano: 10 AgReO4 crystals (250-300  g each) as cryogenic bolometers (T=10 mK)  E(FWHM)=28 eV at 2.5 keV m  < 15 eV at 90 % CL (complication: ‘’ forbidden ’’ transition)

19. Next version: MARE (Microcalorimeter Array for a Rhenium Experiment) 1)300 calorimeters of a few 100  g, with  E=10-20 eV in progress, start data taking in 2010 for a few years 2)R&D for new thermistors goal 5x10 4 calorimeters with  E< 5 eV Like KATRIN, but with completely different systematics!

20. Global fit to all existing data atmospheric, reactors (SBL) solar accelerators accelerators reactors (LBL)