PLANCK 2011 - From the Planck Scale to the ElectroWeak Scale

Session

P8 - LEPTONS (MOSTLY NEUTRINOS)

1 Jun 2011, 14:00

Main Auditorium (IST Congress Centre)

Conveners

P8 - LEPTONS (MOSTLY NEUTRINOS)

• Mariam Tórtola (IFIC, Valencia)

1. New anomalies in the solar neutrino sector ?

Dr Antonio Palazzo (TUM)

01/06/2011, 14:00

The solar neutrino sector shows two weak hints of anomalous behavior. First, the value of the mixing angle theta_12 inferred by the solar data is slightly different from that obtained by KamLAND. Second, as evidenced by the recent low-threshold measurements performed by Borexino, Super-Kamiokande and the Sudbury Neutrino Observatory, the solar 8B neutrino spectrum shows no sign of the...

121. Neutrino decay in dense matter

Chitta Ranjan Chitta

01/06/2011, 14:15

Neutrino decay in dense matter

95. The reactor antineutrino anomaly and large extra dimensions

Mr Pedro Machado (CEA-Saclay)

01/06/2011, 14:30

Recently, there has been a reevaluation of the reactor antineutrino spectra which increased the mean flux by 3%. The analysis of the former reactor antineutrino experiments with the new spectra revealed a 2.2 sigma deviation from the consolidated 3 neutrino framework. Together with gallium solar neutrino calibration experiments, this deviation is around 3 sigma. We show that in the context of...

38. Neutrinoless double beta decay in seesaw models

Dr Jacobo Lopez-Pavon (IPPP, Durham University)

01/06/2011, 14:45

We study the general phenomenology of neutrinoless double beta decay in seesaw models. In particular, we focus on the dependence of the neutrinoless double beta decay rate on the mass of the extra states introduced to account for the Majorana masses of light neutrinos. For this purpose, we compute the nuclear matrix elements as functions of the mass of the mediating fermions and estimate the...

104. Present results of the ANTARES telescope

Dr Carla Distefano (LNS, Catania)

01/06/2011, 15:00

ANTARES (Astronomy with a Neutrino Telescope and Abyss environmental RESearch) 
is the largest underwater neutrino detector currently operating in the Northern hemisphere. It consists of 885 PMTs, which are distributed in 12 vertical lines, various calibration systems and devices for environmental measurements. The telescope, installed at a depth of about 2500 meters in the Mediterranean Sea...

66. Probing sterile neutrinos in meson decays

Dr Takehiko Asaka (Niigata University)

01/06/2011, 15:15

We consider the nuMSM, which is the minimal standard model extended by three right handed neutrinos with masses lighter than the weak scale. In this model, the lightest right-handed neutrino $N_1$ is dark matter of the universe and the other two $N_2$ and $N_3$ are responsible to the neutrino masses in oscillation experiments and baryon asymmetry of the universe. In this talk, we would...

17. Lepton mixing under the lepton charge nonconservation, neutrino masses and oscillations and the "forbidden" decay \mu^-- --> e^-- + \gamma

Dr Valery Lyuboshitz (Joint Institute for Nuclear Research ( Dubna ))

01/06/2011, 15:30

The lepton-charge ( L_e, L_{\mu}, L_{\tau} ) non-conserving interaction leads to the mixing of the electron, muon and tau neutrinos, which manifests itself in spatial oscillations of a neutrino beam, and also to the mixing of the electron, negative muon and tau lepton – which, in particular, may be the cause of the "forbidden" radiative decay of the negative muon into the electron and \gamma...

68. Latest Result from the MEG Experiment

Dr Hajime Nishiguchi (KEK)

01/06/2011, 15:45

The MEG Experiment searches for a lepton flavour violating muon decay, muon to electron and gamma, with a branching-ratio sensitivity of 10^{-13} in order to explore the parameter region predicted by many theoretical models beyond the Standard Model. The first physics result was published in 2009, and the consecutive physics run is currently running. The newest result of 2009/2010 data...