DISCRETE '08: Symposium on Prospects in the Physics of Discrete Symmetries

Session

Parallel Session B. Neutrino mass mixing and CP-I

13 Dec 2008, 15:00

Valencia, Spain

Conveners

Parallel Session B. Neutrino mass mixing and CP-I

• Niki SAOULIDOU (Fermi National Accelerator Laboratory)

77. Two Body Weak Decays Studies in an Ion Storage Ring

Prof. Paul Kienle (Excellence Cluster Universe, Technische Universität München)

13/12/2008, 15:00

Neutrino Mass, Mixing and CP

We have studied in a heavy ion storage ring at GSI Darmstadt, Germany the orbital electron capture decays of H-like 140Pr,142Pm and 122I ions and found that the time dependence of the electron capture rate is not exponential but time modulated with a period of T= 7.o6(8) s, 7.10(22) s and 6.04 s for 140Pr,142Pm and 122I, respectively, in the laboratory system of the ions moving with 071% of...

34. OPERA : on the way to nu-tau observation

Igor Kreslo (Laboratorium fuer Hochenergiephysik)

13/12/2008, 15:25

Neutrino Mass, Mixing and CP

The hypothesis of neutrino flavour changing in weak interaction representation via oscillations is confirmed by several experiments, all based on the observation of the disappearance of a given neutrino flavour. The direct appearance of a flavour different from the initial one, was never observed so far. OPERA is the first long baseline neutrino oscillation experiment employing nuclear...

40. The Double Chooz reactor neutrino experiment

Dr Inés Gil Botella (Cent.de Investigac.Energeticas Medioambientales y Tecnol. (CIEMAT))

13/12/2008, 15:50

Experimental Prospects

The Double Chooz reactor neutrino experiment will be the next detector to search for a non vanishing q13 mixing angle with unprecedented sensitivity, which might open the way to unveiling CP violation in the leptonic sector. The measurement of this angle will be based in a precise comparison of the antineutrino spectrum at two identical detectors located at different distances from the Chooz...

90. Lepton flavour violating stau decays versus seesaw parameters: correlations and expected number of events for both seesaw type-I and II

Dr Albert Villanova del Moral (CFTP, Instituto Superior Técnico)

13/12/2008, 16:15

Supersymmetry

In minimal supergravity (mSugra), the neutrino sector is related to the slepton sector by means of the renormalization group equations. This opens a door to indirectly test the neutrino sector via measurements at LHC. Concretely, for the simplest seesaw type-I, we present the correlations between seesaw parameters and ratio of stau lepton flavour violating (LFV) branching ratios. We find some...

58. Quasi-degenerate neutrinos and tri-bi-maximal mixing

Ivo de Medeiros Varzielas (CFTP, IST)

13/12/2008, 16:35

Neutrino Mass, Mixing and CP

We consider how, for quasi-degenerate neutrinos with tri-bi-maximal mixing at a high energy scale, the mixing angles are affected by radiative running from high to low-energy scales in a supersymmetric theory. The limits on the high energy scale that follow from consistency with the observed mixing are determined. We construct a model in which a non-Abelian discrete...

57. Modelling tri-bimaximal neutrino mixing

Dr Stefano Morisi (IFIC)

13/12/2008, 16:55

Family Symmetries

We suggest ways to model tri-bimaximal lepton mixing from first principles that avoid the problem of the vacuum alignment present in all models for tri-bimaximal mixing. This is achieved by using a single A4-triplet of Higgs scalars as well as three fermion triplets, and maintaining A4 as a symmetry of the full Lagrangian. The model realization we discuss is potentially testable at the LHC...

122. The relationship between Leptogenesis and low energy observables

Mrs Margarida N. Rebelo (IST Lisbon)

13/12/2008, 17:15

TBD

125. Analytical description of the Earth matter effect on neutrino oscillations

Juan C. D'Olivo (Universidad de Mexico)

13/12/2008, 17:35

We present an analytical description of neutrino oscillations in matter based on the Magnus expansion of the time evolution operator. The approximated expressions obtained for the case of two neutrino mixing that propagate in the Earth potential, give considerably better results and in a wider energy range than the perturbative expressions existing in the literature. We apply our formalism to...