Off-shell Particle Decay: Does Mass Affect Cross Section?

[Safinaz]

Hi all,

I think that the off shell decay dosn't decrease the decay cross section, I mean if a particle X
decays into a jet pair has mass for example Mjj ~ 130 GeV, being X has mass M ~ 130 GeV so decay
in resonance or on shell into jj or being MX even much greater ~ 2000 GeV , this won't affect the
cross section value . So is that right ?

Bests,
Safinaz

 

[mfb]

I don't understand what you are asking.
"decrease" the cross-section where, relative to what? "affect" in which way?

The particle mass influences the cross-section of a 130 GeV process. A particle mass of 130 GeV will lead to a larger cross-section than other particle masses.