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

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SUMMARY

The discussion centers on the relationship between particle mass and decay cross sections in off-shell particle decay processes. Specifically, it is established that a particle X decaying into a jet pair with a mass of approximately 130 GeV does not decrease the decay cross section, regardless of whether the mass of X is also around 130 GeV or significantly higher, such as 2000 GeV. The consensus is that a particle mass of 130 GeV results in a larger cross section compared to other masses, affirming that mass does influence cross-section values in particle decay.

PREREQUISITES
  • Understanding of particle physics concepts, particularly off-shell and on-shell decay.
  • Familiarity with cross-section measurements in high-energy physics.
  • Knowledge of jet pair production and its significance in particle collisions.
  • Basic grasp of resonance phenomena in particle decay processes.
NEXT STEPS
  • Research the impact of particle mass on decay cross sections in high-energy physics.
  • Study the principles of resonance in particle decay and its implications for cross-section values.
  • Explore the methods for measuring cross sections in particle collisions, focusing on jet pair production.
  • Investigate the differences between on-shell and off-shell particle decay processes and their effects on experimental outcomes.
USEFUL FOR

Particle physicists, researchers in high-energy physics, and students studying the effects of mass on decay processes will benefit from this discussion.

Safinaz
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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
 
Physics news on Phys.org
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.
 

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