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Etudes des proprietes des neutrinos dans les contextes ...

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tel-00450051, version 1 - 25 Jan 2010<br />

3.1.2 The neutrino fluxes and the neutrino spheres . . . . . . . . 55<br />

3.2 Our supernova model . . . . . . . . . . . . . . . . . . . . . . . . . 58<br />

3.2.1 The density profile . . . . . . . . . . . . . . . . . . . . . . 58<br />

3.2.2 The neutrino fluxes at the neutrino spheres . . . . . . . . . 59<br />

3.2.3 R-process nucleosynthesis . . . . . . . . . . . . . . . . . . 60<br />

III Neutrino properties and supernovae 65<br />

4 CP-violation and supernova <strong>neutrinos</strong> 67<br />

4.1 CP effects with neutrino interactions at tree level . . . . . . . . . 68<br />

4.1.1 Exact analytical formulas . . . . . . . . . . . . . . . . . . 68<br />

4.1.2 Numerical results . . . . . . . . . . . . . . . . . . . . . . . 74<br />

4.2 CP effects including one loop corrections . . . . . . . . . . . . . . 79<br />

4.2.1 Theoretical framework . . . . . . . . . . . . . . . . . . . . 79<br />

4.2.2 Explicit CP-violation phase dependence . . . . . . . . . . 85<br />

5 Neutrino-neutrino interactions 89<br />

5.1 Theoretical framework . . . . . . . . . . . . . . . . . . . . . . . . 89<br />

5.1.1 The effective interaction Hamiltonian . . . . . . . . . . . . 89<br />

5.1.2 The Neutrino Bulb Model . . . . . . . . . . . . . . . . . . 91<br />

5.2 The different collective behaviours . . . . . . . . . . . . . . . . . . 95<br />

5.2.1 The synchronized regime . . . . . . . . . . . . . . . . . . . 96<br />

5.2.2 The bipolar regime . . . . . . . . . . . . . . . . . . . . . . 98<br />

5.2.3 The spectral splits . . . . . . . . . . . . . . . . . . . . . . 104<br />

5.2.4 Phenomenological implications on the fluxes . . . . . . . . 108<br />

6 Collective neutrino oscillations in supernovae and CP-violation111<br />

6.1 Analytical results . . . . . . . . . . . . . . . . . . . . . . . . . . . 111<br />

6.2 General condition for CP-violation in supernovae . . . . . . . . . 114<br />

6.3 Numerical results . . . . . . . . . . . . . . . . . . . . . . . . . . . 115<br />

7 A dynamical collective calculation of supernova neutrino signals121<br />

7.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121<br />

7.1.1 A dynamic supernova density profile . . . . . . . . . . . . 121<br />

7.1.2 Multiple resonances and phase effects . . . . . . . . . . . . 123<br />

7.2 A signature for small θ13 in inverted hierarchy . . . . . . . . . . . 126<br />

7.2.1 Signal on Earth . . . . . . . . . . . . . . . . . . . . . . . . 128<br />

7.2.2 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . 131<br />

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