Alberto Cruz. On behalf of the CDF collaboration. XXXIV International Symposium on Multiparticle Dynamics. Chicago . Florida. Booster. CDF. DØ. Tevatron. p sou rce. Main Injector. Fermilab. Long Term Luminosity Projection (by end FY2009). Base Goal -> 4.4 fb-1
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On behalf of the CDF collaboration
XXXIV International Symposium on Multiparticle Dynamics
(by end FY2009)
Base Goal -> 4.4 fb-1
Design -> 8.5 fb-1Tevatron
RUN IIa (2001~2005) ~1fb-1
RUN I (1992-95) ~0.1fb-1
Recent Luminosity Record of 10.3x1031 sec-1cm-2 (July 16, 2004)
CDF -> ~450 pb-1 on tape
The Jet Algorithm Allows us to “see” the partons (or at least their fingerprints) in the final hadronic state.
In proton-antiproton collisions we can occasionally have a “hard” parton-parton scattering resulting in large transverse momentum outgoing partons.
Cross section calculable in pQCD
Arbitrary Rsep parameter still
present in pQCD calculation …
Comparison of JetClu and MidPoint for HERWIG MC least their fingerprints) in the final hadronic state.
Comparison of the JetClu to MidPoint cone algorithms
Differences between MidPoint and JetClu found to be due to “ratcheting”.
JetClu 0.5-2% higher ET jets
Inclusive s (nb)
Run I (1.8 TeV):
CDF I: 2.380.24
Run II (1.96 TeV):
CDF II: 2.640.18
W + 1 parton +PS
W+ 2 partons
QCD corrections cover this difference.
40% higher than the RUNI result
Alpgen + Herwig
LO large uncertainty
ME+PS implementation tested using the Nth jet spectrum in W+Njet events.
Dijet Mass in W+2jets
1st jet in W + 1p
2nd jet in W + 2p
Data: 2 isolated γs in central region, ET1,2 > 14, 13 GeV
MC templates for b/c & (uds) used to extract b/c fraction in data
γ least their fingerprints) in the final hadronic state.+heavy flavour production
Good agreement with LO pQCD
within still very large stat. errors
Validates quark flavour separation
using secondary vertex mass