Academic Paper from the year 2020 in the subject Physics - Other, , language: English, abstract: In this paper, we calculated the magnetic decay widths between two mesons containing two different heavy quarks ($c\overline{b}$) for the process of $B^{*}_{c}\rightarrow B_{c}+\gamma$, within the framework of Bethe-Salpeter approach. The calculated values are found to be in a reasonable agreement with other theoretical results.

The fourth edition includes new developments, in particular a new section on the double beta decay including a discussion of the possibility of a neutrinoless decay and its implications for the standard model.

This 2006 book uses the standard model as a vehicle for introducing quantum field theory.