When in particle physics they plot the mass histogram we see a resonance on top of a decaying exponential background?

Why is the background modeled to be that way? what is the physical explanation?



Decaying exponentials are the result of there being a fixed probability of any specific member of a population being removed. Once removed, the population decreases and so the rate of decay also decreases. The rate of decay is therefore associated with a particular time scale related to the change in population. The same model works if the population is growing - it still leads to an exponential, just one that's growing.

  • $\begingroup$ This is an answer to a different question. OP is asking about the shape of combinatoric background in invariant mass spectra. $\endgroup$ – dukwon Jul 15 '15 at 7:41

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.