NOTE: this page is only collecting cross sections for comparisons between ATLAS and CMS, it's NOT a reference source for cross sections

Background cross sections used by CMS

process σ times BR generator notes
Z/g->ll(m>20) 1666pb (x3) powheg(CT10)+pythia(Z2)  
Z/g->ll(10-20) 3893pb (x3) powheg(CT10)+pythia(Z2)  
Z/g->ll(m>50) 11679pb madgraph+pythia(Z2)  
Z+jets (m_ll>50 gev) 3048pb (x3) madgraph  
W->lv 31314pb madgraph+pythia(Z2)  
W/Z+g 165pb madgraph+pythia  
tt 157.5pb madgraph+pythia(Z2)  
tt->2l2v2b 16.7pb powheg  
t (s-ch.) 1.4pb madgraph+pythia(Z2)  
t (t-ch.) 20.9pb madgraph+pythia(Z2)  
tW 10.6pb madgraph+pythia(Z2)  
qq->WW 43.0pb madgraph+pythia(D6T)+tauola  
gg->WW->2l2v 0.153pb gg2ww+pythia(Z2)  
WZ 18.2pb pythia(Z2)  
ZZ 5.9pb pythia(Z2)  
ZZ->4l 100.84fb pythia σ from MCFMv5.8 is 95fb, plus another 5.8fb from gg2ZZ.
Does not include single-resonant diagrams
ZZ->4l 143 fb powheg not yet used ; includes signle resonant but not gg->ZZ;
(σ from MCFMv6 includes also gg->ZZ, we subtracted it to get the 143 fb)
gg2ZZ -> 2l2l' 9.29 fb gg2ZZ not yet used
gg2ZZ -> 4l 6.63 fb gg2ZZ not yet used

-- GiovanniPetrucciani - 14-Jul-2011

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Topic revision: r2 - 2011-07-14 - GiovanniPetrucciani
 
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