We study string theory on the analytically continued β deformed background proposed in hep-th/0509036. This non-static model provides a solvable conformal field theory which describes time-dependent twisted string dynamics. With the mini-superspace approach, we examine disk one-point correlators of D-branes and compute winding string pair production rate. We find that these results are consiste...

We investigate string theory on the analytically continued β deformed background proposed in hep-th/0509036. This non-static model provides a solvable conformal field theory which describes time-dependent twisted string dynamics. We also study its low energy limit by mini-superspace analysis. We examine winding string pair production through the Bogoliubov coefficient, and disk one-point correl...

The background induced by radioactive impurities of Tl and Bi in the source of the double beta experiment NEMO-3 has been investigated. New methods of data analysis which decrease the background from the above mentioned contamination are identified. The techniques can also be applied to other double beta decay Preprint submitted to Elsevier Science experiments capable of measuring independently...

Germanium detectors have very good capabilities for the investigation of rare phenomena like the neutrinoless double beta decay. Rejection of the background entangling the expected signal is one primary goal in this kind of experiments. Here, the attainable background reduction in the energy region where the neutrinoless double beta decay signal of Ge is expected to appear has been evaluated fo...