What is soft-QCD? - High Energy Physics
What is soft-QCD? - High Energy Physics
What is soft-QCD? - High Energy Physics
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<strong>What</strong> <strong>is</strong> <strong>soft</strong>-<strong>QCD</strong>?<br />
cross-section for any interaction<br />
(dominated by <strong>soft</strong>-<strong>QCD</strong>)<br />
10 8<br />
10 7<br />
10 6<br />
proton - (anti)proton cross sections<br />
! tot<br />
Tevatron<br />
LHC<br />
10 9<br />
10 8<br />
10 7<br />
10 6<br />
cross-section for Higgs production<br />
!!!!"nb#<br />
10 5<br />
10 4<br />
10 3<br />
10 2<br />
10 1<br />
10 0<br />
10 -1<br />
10 -2<br />
10 -3<br />
10 9 10 -7<br />
! b<br />
! jet<br />
(E T jet > "s/20)<br />
! W<br />
!Z<br />
! jet<br />
(E T jet > 100 GeV)<br />
! t<br />
10 5<br />
10 4<br />
10 3<br />
10 2<br />
10 1<br />
10 0<br />
10 -1<br />
10 -2<br />
10 -3<br />
events / sec for L = 10 33 cm -2 s -1<br />
10 -4<br />
! Higgs<br />
(M H<br />
=120 GeV)<br />
10 -4<br />
At the LHC only 1 in every ~10 billion<br />
interactions would produce a Higgs<br />
(if it ex<strong>is</strong>ts at all…)<br />
10 -5<br />
10 -6<br />
10 -7<br />
WJS2010<br />
200 GeV<br />
500 GeV<br />
0.1 1 10<br />
"s (TeV)<br />
7<br />
10 -5<br />
10 -6<br />
Emily Nurse<br />
Soft-<strong>QCD</strong><br />
5
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