- #1
PLuz
- 64
- 0
Homework Statement
Hello,
Given the decay: [itex]H \rightarrow W^{-} + \bar{s} + c[/itex], where it only matters that [itex]\bar{s}[/itex] and [itex]c[/itex] are fermions and [itex]W^{-}[/itex] is the W boson. If one knows the total width of the process how can we calculate the longitudinal width?
Homework Equations
In the frame where de boson has velocity zero the longitudinal polarization vector is given by: [itex]\epsilon_{\mu}(k)=(0,0,0,1)[/itex]
In the frame where [itex]W^{-}[/itex] moves at velocity [itex]\overrightarrow{\beta}[/itex]:
[itex]\epsilon_{\mu}(k)=(\gamma \beta, \gamma \frac{\overrightarrow{\beta}}{\beta})[/itex]
The Attempt at a Solution
I'm completely clueless of how to even start. Can anyone help me?
Thank you