MeV neutrinos in double beta decay

The effect of Majorana neutrinos in the MeV mass range on the double beta decay of various isotopes is studied on pure phenomenological arguments. By using only experimental half life data, limits on the mixing parameter $U_{eh}^2$ of the order 10$^{-7}$ can be derived. Also the possible achievements of upcoming experiments and some consequences are outlined.Comment: 7 pages, 6 uudecoded EPS-figure

Optimized Trigger for Ultra-High-Energy Cosmic-Ray and Neutrino Observations with the Low Frequency Radio Array

When an ultra-high energy neutrino or cosmic ray strikes the Lunar surface a radio-frequency pulse is emitted. We plan to use the LOFAR radio telescope to detect these pulses. In this work we propose an efficient trigger implementation for LOFAR optimized for the observation of short radio pulses.Comment: Submitted to Nuclear Instruments and Methods in Physics Research Section

Free Energies and fluctuations for the unitary Brownian motion

We show that the Laplace transforms of traces of words in independent unitary Brownian motions converge towards an analytic function on a non trivial disc. These results allow one to study the asymptotic behavior of Wilson loops under the unitary Yang--Mills measure on the plane with a potential. The limiting objects obtained are shown to be characterized by equations analogue to Schwinger--Dyson's ones, named here after Makeenko and Migdal

Influence of inhomogeneities on the quench onset in 2G HTS tapes

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Carcinoid syndrome

The authors report a rare case of carcinoid syndrome (CS) in a 12-year-old child that was caused by a carcinoid tumor located in the ileum that had metastasized mainly to the liver. After resection of the primary tumor, treatment with octreotide and polychemotherapy (five monthly cycles of 5-fluorouracil, epidoxorubicin, and deticene) was ineffective for both reducing the metastatic liver disease and controlling the clinical symptoms. The patient's poor prognosis led the authors to perform a liver transplantation. The results of liver transplantation in patients with metastatic liver disease are generally not good. However, neuroendocrine tumors seem to be an exception due to their slow growth. At present, the child is in complete clinical and laboratory remission 4 months after transplantation. To the best of our knowledge, only 5 cases of CS have been reported to date in children