why is the cross-sectionwith ISR in MGISR plugin very larger than without ISR for e- e+ > ta- ta+ ?

Asked by Reza Jafari on 2021-05-01

Dear Experts,

I calculated the cross-section of e- e+ > ta- ta+ with swiching the ISR effect on via MGISR plugin at 157.5 GeV.
I found the cross-section in this process with ISR is very much larger than the cross-section without ISR, and it seems weird (it is similar for other center-of-mass energies).

Do you think this is correct or maybe there is bug in MGISR plugin?

xsec = 11076 fb (with ISR in MGISR plugin)
xsec = 4869 fb (without ISR)


Question information

English Edit question
Ubuntu Edit question
No assignee Edit question
Last query:
Last reply:
Launchpad Janitor (janitor) said : #1

This question was expired because it remained in the 'Open' state without activity for the last 15 days.