A Few Topics on the Standard Model Phenomenology from Lattice QCD

por Damir Becirevic (Universita di Roma "La Sapienza")

martes 5 jun. 2001 12:00 → 13:00 Europe/Madrid

Sala Seminarios (Dpto. de Física Teórica (UVEG))

In this talk I focus on our present knowledge of the hadronic parameters which are essential for the assessment of the amount of the CP violation that comes from the Standard Model. I discuss the recent lattice results for the $K^0$--$\overline K^0$ and $B^0$--$\overline B^0$ mixing amplitudes. I also discuss the present status of the calculations for the $B\to \pi \ell \nu$ decay rate. This decay provides an essential constraint onto the shape of the unitarity triangle. Finally, I touch on the theoretical predictions for the heavy meson lifetime differences/ratios an present new lattice results for the relevant matrix elements. In this talk, I try to omit technical details as much as possible, to make the main ideas clear and easy to understand to those who are not familiar with the lattice QCD computations.