No abstract

The recent observation of B 0 d → π 0 π 0 andB 0 d → π 0 π 0 decay modes allows us to make a fresh isospin analysis of B → ππ transitions. We find that current experimental data can impose some model-independent constraints on the parameter space of direct CP violation in B d → π + π − and B d → π 0 π 0 . Furthermore, we establish a direct relationship between the weak phase α and the charge-averaged branching fractions and CP-violating asymmetries of B → ππ decays.

We proposed frequency-selective carrier coded aperture correlation holography (FSC-COACH). By introducing frequency-selective techniques into randomly encoded aperture correlation holography, a library of virtual point spread functions (PSFs) for image reconstruction is obtained by modulating plane waves with carrier spherical wave and encoded phase mask, and reconstruction of occlusion imaging is achieved using FSPC. This is a new nonvisual imaging technique that can effectively suppress background noise and accurately encode the transverse region of the image plane to achieve fast non-linear reconstruction. The effect of the virtual point diffusion function filter radius on the reconstruction quality is experimentally analysed. The viability of our technique is demonstrated by reconstructing standard particles under mask occlusion.

We proposed frequency-selective carrier coded aperture correlation holography (FSC-COACH). By introducing frequency-selective techniques into randomly encoded aperture correlation holography, a library of virtual point spread functions (PSFs) for image reconstruction is obtained by modulating plane waves with carrier spherical wave and encoded phase mask, and reconstruction of occlusion imaging is achieved using FSPC. This is a new nonvisual imaging technique that can effectively suppress background noise and accurately encode the transverse region of the image plane to achieve fast non-linear reconstruction. The effect of the virtual point diffusion function filter radius on the reconstruction quality is experimentally analysed. The viability of our technique is demonstrated by reconstructing standard particles under mask occlusion.