Measurement Of The T Bar T Cross Section Using The Dimuon Channel In P Bar P Collisions At U221a S
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Measurement Of The T Bar T Cross Section Using The Dimuon Channel In P Bar P Collisions At U221a S
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Author :
language : en
Publisher:
Release Date : 2004
Measurement Of The T Bar T Cross Section Using The Dimuon Channel In P Bar P Collisions At U221a S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
The author has measured the t$ar{t}$ production cross section at √s = 1.96 TeV using data collected by the D0 experiment at Fermilab. The integrated luminosity of the data set is 140 pb-1 and a total of four candidate events are seen, with an expected background of 2.61 events. The measured cross section of ?t$ar{t}$ = 11.1$+22.1top{-9.3}$(stat.)$+4.3top{-4.5}$(sys.) pb is in agreement with a NNLO calculation of 6.77 pb.
Measurement Of The T Anti T Cross Section Using The Dimuon Channel In P Anti P Collisions At S 1 2
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Author : Robert Crampton McCroskey
language : en
Publisher:
Release Date : 2004
Measurement Of The T Anti T Cross Section Using The Dimuon Channel In P Anti P Collisions At S 1 2 written by Robert Crampton McCroskey and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
The author has measured the t{bar t} production cross section at {radical}s = 1.96 TeV using data collected by the D0 experiment at Fermilab. The integrated luminosity of the data set is 140 pb{sup -1} and a total of four candidate events are seen, with an expected background of 2.61 events. The measured cross section of {sigma}{sub t{bar t}} = 11.1{sub -9.3}{sup +22.1}(stat.){sub -4.5}{sup +4.3}(sys.) pb is in agreement with a NNLO calculation of 6.77 pb.
Measurement Of The T Anti T Cross Section Using The Dimuon Channel In Ppbar Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2005
Measurement Of The T Anti T Cross Section Using The Dimuon Channel In Ppbar Collisions At Sqrt S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
The authors have measured the t[bar t] production cross section at [radical]s = 1.96 TeV using data collected by the D0 experiment at Fermilab. The integrated luminosity of the data set is 140 pb[sup -1] and a total of four candidate events are seen, with an expected background of 2.61 events. The measured cross section of [sigma][sub t[bar t]] = 11.1[sub -9.3][sup +22.1](stat.)[sub -4.5][sup +4.3](sys.) pb is in agreement with a NNLO calculation of 6.77 pb.
Measurement Of The T Bar T Production Cross Section In P Bar P Collisions At U221a S
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Author :
language : en
Publisher:
Release Date : 2005
Measurement Of The T Bar T Production Cross Section In P Bar P Collisions At U221a S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
We present the measurement of the t$ar{t}$ cross section in the lepton plus jets channel with ≥ 1 and ≥ 2 secondary vertex tags. We use the scalar sum of transverse energies of the event (HT) to discriminate t{bar t} from the other backgrounds. We also use the transverse mass of the leptonic W-boson (M$Wtop{T}$) to further reduce the Non-W backgrounds. We use a combination of data and Monte Carlo to estimate the backgrounds from electroweak processes, single top, fake leptons, W+ Light Flavor fake tags, and real W+ Heavy Flavor production. We obtain a value of ? ≥1 = 8.7$+0.9top{-0.9}$(stat)$+1.2top{-0.9}$(sys) pb for the ≥1 tag cross section, and ? ≥2 = 8.7$+1.8top{-1.6}$(stat)$+1.9top{-1.3}$(sys) pb for the ≥2 tag cross section. The authors also present a measurement of the t$ar{t}$ cross section by fitting the Njet spectrum. They combine the =1 and ≥2 tag cross sections to obtain ?t$ar{t}$ = 8.9$+0.9top{-0.9}$(stat)$+1.4top{-1.3}$(syst)pb.
A Measurement Of The Production Cross Section Of T Bar T In P Bar P Collisions At U221a S
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Author :
language : en
Publisher:
Release Date : 2004
A Measurement Of The Production Cross Section Of T Bar T In P Bar P Collisions At U221a S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
A measurement of the t$\bar{t}$ pair production cross section is presented using 162 pb -1 of data collected by the CDF experiment during Run II at the Tevatron. t$\bar{t}$} events in the lepton+jets channel are isolated by identifying electrons and muons, reconstructing jets and transverse missing energy, and identifying b jets with a secondary vertex tagging algorithm. The efficiency of the algorithm is measured in a control sample using a novel technique that is less dependent on the simulation. For a top quark mass of 175 GeV/c2 , a cross section of ?t$\bar{t}$ = 5.6$+1.2\atop{-1.1}$(stat.)$+0.9\atop{-0.6}$(syst.)pb is measured.
A Measurement Of The T Bar T Production Cross Section In P Bar P Collisions At U221a S
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Author :
language : en
Publisher:
Release Date : 2008
A Measurement Of The T Bar T Production Cross Section In P Bar P Collisions At U221a S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
I present a measurement of the t$ar{t}$ production cross section at √s = 1.96 TeV using 2034 pb-1 of CDF Run II data using events with a high transverse momentum electron or muon, three or more jets, and missing transverse energy. The measurement assumes a t → Wb branching fraction of 100 percent. Events consistent with t$ar{t}$ decay are found by identifying jets containing heavy-flavor semileptonic decays to muons. The dominant backgrounds are evaluated directly from the data. Based on 248 candidate events and an expected background of 86.8 ± 5.6 events, I measure a production cross section of 8.7 ± 1.1$+0.9top{-0.8}$ ± 0.6 pb, in agreement with the Standard Model.
Measurement Of The T Anti T Production Cross Section In P Anti P Collisions At S 1 2
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Author : Lucio Cerrito
language : en
Publisher:
Release Date : 2005
Measurement Of The T Anti T Production Cross Section In P Anti P Collisions At S 1 2 written by Lucio Cerrito and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
We present two measurements of the t{bar t} production cross section in collisions of protons and antiprotons at {radical}s = 196 TeV. We analyze a dataset of 310 {+-} 20 pb{sup -1} collected with the CDF 2 detector. In the first measurement, we select events with six to eight jets, at least one of which having a displaced secondary vertex, little or no missing transverse energy and optimized kinematical criteria consistent with the t{bar t} all-hadronic decay channel. In the second measurement, we select events with four or more jets, at least one of which having a displaced secondary vertex, high missing transverse energy, and optimized kinematical criteria consistent with the decay of t{bar t} to {tau}+jets. The averaged t{bar t} production cross section, determined from six different measurements using the CDF 2 detector in the dilepton, lepton+jets and all-hadronic decay channels, is also calculated to be {sigma}{sub t{bar t}} = 7.1 {+-} 0.6(stat) {+-} 0.7(syst) {+-} 0.4(lumi) pb, in agreement with the prediction of the standard model.
Measurement Of The T Bar T Production Cross Section Using Dilepton Events In P Bar P Collisions
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Author :
language : en
Publisher:
Release Date : 2011
Measurement Of The T Bar T Production Cross Section Using Dilepton Events In P Bar P Collisions written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
We present a measurement of the t{bar t} production cross section [sigma]{sub t{bar t}} in p{bar p} collisions at √s = 1.96 TeV using 5.4 fb−1 of integrated luminosity collected with the D0 detector. We consider final states with at least two jets and two leptons (ee, e[mu], [mu][mu]), and events with one jet for the the e[mu] final state as well. The measured cross section is [sigma]{sub t{bar t}} = 7.36{sub -0.79}{sup +0.90} (stat + syst) pb. This result combined with the cross section measurement in the lepton + jets final state yields [sigma]{sub t{bar t}} = 7.56{sub -0.56}{sup +0.63}(stat + syst) pb, which agrees with the standard model expectation. The relative precision of 8% of this measurement is comparable to the latest theoretical calculations.
Modern Drawings And Watercolours
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Author :
language : en
Publisher:
Release Date : 1967
Modern Drawings And Watercolours written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with categories.
Measurement Of The T Anti T Production Cross Section In P Anti P Collisions At S
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Author :
language : en
Publisher:
Release Date : 2005
Measurement Of The T Anti T Production Cross Section In P Anti P Collisions At S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
We present two measurements of the t{bar t} production cross section in collisions of protons and antiprotons at √s = 196 TeV. We analyze a dataset of 310 ± 20 pb−1 collected with the CDF 2 detector. In the first measurement, we select events with six to eight jets, at least one of which having a displaced secondary vertex, little or no missing transverse energy and optimized kinematical criteria consistent with the t{bar t} all-hadronic decay channel. In the second measurement, we select events with four or more jets, at least one of which having a displaced secondary vertex, high missing transverse energy, and optimized kinematical criteria consistent with the decay of t{bar t} to?+jets. The averaged t{bar t} production cross section, determined from six different measurements using the CDF 2 detector in the dilepton, lepton+jets and all-hadronic decay channels, is also calculated to be?{sub t{bar t}} = 7.1 ± 0.6(stat) ± 0.7(syst) ± 0.4(lumi) pb, in agreement with the prediction of the standard model.