293 | | || || isr || ISR=0: no correction, except if all ME final-state particles are reconstructed in the final state: in that case, the pT of the reconstructed particles may not be balanced and one cannot ignore the effects from ISR. The phase-space integration is done under the assumption that, point-by-point in the phase-space, the parton-level final state has a pT balancing pT(ISR), with pT(ISR) set to minus the transverse momentum of the reconstructed objects in the LHCO file. ISR=1: point by point in the phase-space, the parton-level final state has a pT |
294 | | balancing pT(ISR), with pT(ISR) set to the experimental value read from the lhco file [as -pT(visible)-pT(missing)]. ISR=2: same as isr=1, except that the value of the weight is translated into a frame where the hard system has no pT. isr=3: only relevant if all final state ME particle are reconstructed. pT of ISR is assumed to be unconstrained (can be anything) -> the dimension of the phase-space integration is augmented by 2, since we also integrate over the pT of the parton-level final state. || |
| 293 | || || isr || ISR=0: no correction, except if all ME final-state particles are reconstructed in the final state: in that case, the pT of the reconstructed particles may not be balanced and one cannot ignore the effects from ISR. The phase-space integration is done under the assumption that, point-by-point in the phase-space, the parton-level final state has a pT balancing pT(ISR), with pT(ISR) set to minus the transverse momentum of the reconstructed objects in the LHCO file. ISR=1: point by point in the phase-space, the parton-level final state has a pT balancing pT(ISR), with pT(ISR) set to the experimental value read from the lhco file [as -pT(visible)-pT(missing)]. ISR=2: same as isr=1, except that the value of the weight is translated into a frame where the hard system has no pT. isr=3: only relevant if all final state ME particle are reconstructed. pT of ISR is assumed to be unconstrained (can be anything) -> the dimension of the phase-space integration is augmented by 2, since we also integrate over the pT of the parton-level final state. || |