MC-TESTER Benchmark Results for Z and W decay

This is the web page for MC-TESTER tests of Z, W and tau decays. We have started to collect data and descriptions. At the moment we have ROOT files and plots produced for Z and W decays. The minimum energy of the photon, energy cut, is = 1 GeV and the multiplicity of photons above this threshold is proportional to the logarithm of the ratio Mz (or Mw) to energy cut. This page is also a demonstration of new options in MC-TESETER. To some degree this overlaps with Tests of PHOTOS Hard Bremsstrahlung, but parameters are tuned to LHC needs for benchmarking. On the other hand, as input we use high precision simulation of LEP time: CEEX2 of KKMC. These can be used in future as reference points.

Download the ROOT output file from the generation step of MC-TESTER or the booklet from the analysis step of MC-TESTER. Note: The ROOT files were produced with ROOT Version 5.18(?), histogram range 0 - 1.1 of parent mass in 120 bins, maximum 2 final state photons. Photons below 1 GeV are recombined.

Depending on the algorithm photons can be ordered by energy, partially ordered, or not ordered at all. In KKMC the first photon is always the hardest one, where as for PHOTOS the first photon is slightly more likely to have a higher energy than the second (third etc.) Some other generators may have a different system of ordering. This is not physical anyway!!

Decay Generator MC-TESTER ROOT file pdf booklet of results pdf booklet of results (log scale)
Z->ee KKMC With photons ordered by the generator:

mc-tester.root-Zee-10Mevt

Without ordering:

mc-tester.root-Zee.unordered

 tester-Zee-10Mevt.pdf tester-Zee-10Mevt_log.pdf
PHOTOS With photons ordered by the generator:

mc-tester.root-Zee-photos-100M-nosym

Without ordering:

mc-tester.root-Zee-photos-100M-sym

 tester-Zee-photos.pdf tester-Zee-photos_log.pdf
PHOTOS (with 10MeV photon filter threshold)

Without ordering:

mc-tester.root-Zee-photos-100M-sym-10MeV

 tester-Zee-photos-10MeV.pdf tester-Zee-photos-10MeV_log.pdf
Z -> mu mu KKMC With photons ordered by the generator:

mc-tester.root-Zmumu-10Mevt

Without ordering:

mc-tester.root-Zmumu.unordered

 tester-Zmumu-10Mevt.pdf tester-Zmumu-10Mevt_log.pdf
PHOTOS With photons ordered by the generator:

mc-tester.root-Zmumu-photos-100M-nosym

Without ordering:

mc-tester.root-Zmumu-photos-100M-sym

 tester-Zmumu-photos.pdf tester-Zmumu-photos_log.pdf
PHOTOS (with 10MeV photon filter threshold)

Without ordering:

mc-tester.root-Zmumu-photos-100M-sym-10MeV

 tester-Zmumu-photos-10MeV.pdf tester-Zmumu-photos-10MeV_log.pdf
W+ -> e+ nu PHOTOS With photons ordered by the generator:

mc-tester.root-Wenuphotos-100M-nosym

Without ordering:

mc-tester.root-Wenu-photos-100M-sym

 tester-Wenu-photos.pdf tester-Wenu-photos_log.pdf
PHOTOS (with 10MeV photon filter threshold) With photons ordered by the generator:

mc-tester.root-Wenu-photos-100M-nosym-10MeV

 tester-Wenu-photos-10MeV.pdf tester-Wenu-photos-10MeV_log.pdf
W+ -> mu+ nu PHOTOS With photons ordered by the generator:

mc-tester.root-Wmunu-photos-100M-nosym

Without ordering:

mc-tester.root-Wmunu-photos-100M-sym

 tester-Wmunu-photos.pdf tester-Wmunu-photos_log.pdf
PHOTOS (with 10MeV photon filter threshold) With photons ordered by the generator:

mc-tester.root-Wmunu-photos-100M-nosym-10MeV

 tester-Wmunu-photos-10MeV.pdf tester-Wmunu-photos-10MeV_log.pdf

Decays of bosons to taus, with taus decaying to pi nu

Description MC-TESTER ROOT file pdf booklet of results (m^1) pdf booklet of results (m^2)
Z -> tau+ tau-

(e+e-->Z, cms 99GeV)

 Mass power=1,spin on

mc-tester.Z_m1_spin_on.root

Mass power=1,spin off

mc-tester.Z_m1_spin_off.root

Mass power=2,spin on

mc-tester.Z_m2_spin_on.root

Mass power=2,spin off

mc-tester.Z_m2_spin_off.root

tester_Z_on_off_m1.pdf

tester_Z_on_off_m2.pdf