The Tevatron Connection August 9-1 0, 2004 Rick Field - CDF/Florida Page 1 The Tevatron The Tevatron Connection Connection Top Pair Cross-Section A Few CDF Run 2 Proton-AntiProton Cross Sections uu d proton u u d A ntiproton B eam -Beam R em nants Beam -Beam R em nants 1.96 TeV Top Pair t-quark t-quark Single Top Cross-Section Single Top t-quark b-quark J/Cross-Section and comparisons with theory! b-Hadron Cross-Section b-Jet & b-DiJet Cross- Sections Charm Meson Cross- Sections + b/c Cross-Sections + Cross-Section Z-boson Cross-Section W-boson Cross-Section W/Z + Cross-Sections W + W Cross-Section Z + W & Z + Z Cross- Sections Inclusive Jet Cross- Sections We now have over 400 pb -1 of data! W+n Jets Cross-Sections J/ J/ b-hadron b-quark b-quark b-jet b-jet b-jet C harm c-quark c-quark + b b-quark photon + photon photon Z-boson W -boson W +jets W -boson jet jet W + W -boson photon W + W W -boson W -boson W + Z W -boson Z-boson Jets jet jet jet
The Tevatron Connection. and comparisons with theory!. A Few CDF Run 2 Proton-AntiProton Cross Sections. Top Pair Cross-Section. Single Top Cross-Section. J/ Y Cross-Section. b-Hadron Cross-Section. b-Jet & b-DiJet Cross-Sections. Charm Meson Cross-Sections. g + b/c Cross-Sections. - PowerPoint PPT Presentation
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
The Tevatron Connection August 9-10, 2004
Rick Field - CDF/Florida Page 1
The TevatronThe TevatronConnectionConnection
Top Pair Cross-Section A Few CDF Run 2 Proton-AntiProton Cross Sections
W/Z + Cross-SectionsW + W Cross-SectionZ + W & Z + Z Cross-Sections Inclusive Jet Cross-Sections
We now haveover 400 pb-1 of
data!
W+n Jets Cross-Sections
J/
J/
b-hadron
b-quark
b-quark
b-jet
b-jet
b-jet
Charm
c-quark
c-quark
+ b
b-quark
photon
+
photon
photon
Z-boson
W-boson
W+jets
W-boson
jet jet
W +
W-boson
photon
W + W
W-boson
W-boson
W + Z
W-boson
Z-boson
Jets
jet jet
jet
The Tevatron Connection August 9-10, 2004
Rick Field - CDF/Florida Page 2
Top Pair Cross SectionTop Pair Cross Section CDF Run 2 SummaryCDF Run 2 Summary
Observed cross sections consistent with each other and with the standard model prediction (1.96 TeV, mt = 175 GeV)
200 pb-1
(tt ) 6.7 0.90.7 pb
Bonciani et al., Nucl. Phys. B529, 424 (1998)Kidonakis and Vogt, Phys. Rev. D68, 114014 (2003)
The Tevatron Connection August 9-10, 2004
Rick Field - CDF/Florida Page 3
Single Top Cross SectionSingle Top Cross Section CDF Run 2 SearchCDF Run 2 Search
Search for W + 2 jets and tag one b. Do likelihood fit to HT (s+t channed combined).
t < 10.1 pb @ 95% CL
t+s < 17.8 pb @ 95% CL
0.88 pb
1.98 pb
s-channel
t-channel t-channel
The Tevatron Connection August 9-10, 2004
Rick Field - CDF/Florida Page 4
The J/The J/ Cross Section Cross Section CDF Run 2CDF Run 2
The J/ inclusive cross-section includes contribution from the direct production of J/ and from decays from excited charmonium, (2S), and from the decays of b-hadrons, B-> J/ + X.
CDF (b)
(J/|Y(J/)| < 0.6)
4.080.02(stat)+0.36(sys)-0.48(sys)
Down to PT = 0!
J/
KB
J/ coming from b-hadronswill be displaced from
primary vertex!
39.7 pb-1
The Tevatron Connection August 9-10, 2004
Rick Field - CDF/Florida Page 5
b-hadron Cross Sectionb-hadron Cross Section CDF Run 2CDF Run 2
Run 2 b-hadron PT distribution compared with FONLL (CTEQ6M).
b-hadron PT CDF (b) FONLL (b)
(b-hadron) 29.40.6(stat)6.2(sys) 27.5+11-8.2
|Y| < 1.0
Excellent agreement between theory and experiment! 39.7 pb-1
Cacciari, Frixone, Mangano, Nason, Ridolfi
The Tevatron Connection August 9-10, 2004
Rick Field - CDF/Florida Page 6
b-Jet Cross Sectionsb-Jet Cross Sections CDF Run 2CDF Run 2
b-quark tag based on displaced vertices. Secondary vertex mass discriminates flavor.
Require one secondary vertex tagged b-jet within 0.1 < |y|< 0.7 and plot the inclusive jet PT distribution (MidPoint, R = 0.7).
Arbitrary normalization!
The Tevatron Connection August 9-10, 2004
Rick Field - CDF/Florida Page 7
b-DiJet Cross Sectionb-DiJet Cross Section CDF Run 2CDF Run 2
Require two secondary vertex tagged b-jets within ||< 1.2. One of these tagged jets has to have a corrected tranverse energy greater than 30 GeV, the other has to have a raw transverse energy greater than 10 GeV.
Normalized to one!
bJet-bbarJet invariant mass
bJet-bbarJet
The Tevatron Connection August 9-10, 2004
Rick Field - CDF/Florida Page 8
Prompt Charm Meson Cross SectionsPrompt Charm Meson Cross Sections CDF Run 2CDF Run 2
Theory calculation from M. Cacciari and P. Nason: Resummed perturbative QCD (FONLL), JHEP 0309,006 (2003) bpD
bpD
bpD
bpD
Ts
T
T
T
22.005.075.0)1|Y|GeV,8,(
7.01.03.4)1|Y|GeV,6,(
8.01.02.5)1|Y|GeV,6,*(
5.12.03.13)1|Y|5.5GeV,,( 0
The Tevatron Connection August 9-10, 2004
Rick Field - CDF/Florida Page 9
+ b/c Cross Sections+ b/c Cross Sections CDF Run 2CDF Run 2
b/c-quark tag based on displaced vertices. Secondary vertex mass discriminates flavor.
The Tevatron Connection August 9-10, 2004
Rick Field - CDF/Florida Page 10
+ b/c Cross Sections+ b/c Cross Sections CDF Run 2CDF Run 2
PYTHIA Tune A correctly predicts the relative amount of u, d, s, c, b quarks within the photon events.
CDF (pb)
(b+ 40.619.5(stat)+7.4(sys)-7.8(sys)
(c+ 486.2152.9(stat)+86.5(sys)-90.9(sys)
+ c + b
T() > 25 GeV
The Tevatron Connection August 9-10, 2004
Rick Field - CDF/Florida Page 11
+ + Cross Section Cross Section CDF Run 2CDF Run 2
Di-Photon cross section with 207 pb-1 of Run 2 data compared with next-to-leading order QCD predictions from DIPHOX and ResBos.
+ mass
+
The Tevatron Connection August 9-10, 2004
Rick Field - CDF/Florida Page 12
Z-boson Cross SectionZ-boson Cross Section CDF Run 2CDF Run 2
Impressive agreement between experiment and NNLO theory (Stirling, van Neerven)!
CDF (pb) NNLO (pb)
(Z) 254.93.3(stat)4.6(sys)15.2(lum) 251.35.0
The Tevatron Connection August 9-10, 2004
Rick Field - CDF/Florida Page 13
W-boson Cross SectionsW-boson Cross Sections CDF Run 2CDF Run 2
CDF (pb) NNLO(pb)
(W) 277510(stat)53(sys)167(lum) 268754
Impressive agreement between experiment and NNLO theory (Stirling, van Neerven)!
CDF NNLO
(W)/(Z) 10.920.15(stat)0.14(sys)
10.690.08
The Tevatron Connection August 9-10, 2004
Rick Field - CDF/Florida Page 14
W + n Jets Cross SectionsW + n Jets Cross Sections CDF Run 2CDF Run 2
Run 2 W + n Jets Cross Section compared with Run 1 (JetClu, R = 0.4).
Run 2 data compared with Alpgen + HERWIG.
Alpgen + HERWIG
The Tevatron Connection August 9-10, 2004
Rick Field - CDF/Florida Page 15
W + W + Cross Sections Cross Sections CDF Run 2CDF Run 2