Resonance Peak Width: How Does it Relate to Scattering Processes?

[Safinaz]

Hi all,

I'd like to know what if we have a scatteing process A+B > C > E+D,
what is the relation between the width of the resonance peak of the particle C at
plotting the inv. mass of particles E and D and the total width of C .

Regards,
S.

 

[RGevo]

This is the breit wigner. Which is modeled by a Cauchy distribution.

 

[Meir Achuz]

The observed width of any particular mass distribution is always the total width of the resinant state.

 

[Safinaz]

How, if the total width of the intermediate particle for example = 2 GeV, the observed width will be 2 cm ..
what if the resinant particle is heavy and has a large total width, like 600 GeV ?

 

[RGevo]

Then you see a very wide resonance. And take into account any hanged to the propagator.