Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Evidence for Tbar T Production at the Tevatron: Statistical Significance and Cross Section
Evidence for T{bar T} Production at the Tevatron
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 7
Book Description
We summarize here the results of the ''counting experiments'' by the CDF Collaboration in the search of t{bar t} production in p{bar p} collisions at (square root)s = 1800 TeV at the Tevatron. We analyze their statistical significance by calculating the probability that the observed excess is a fluctuation of the expected backgrounds, and assuming the excess is from top events, extract a measurement of the t{bar t} production cross-section.
Publisher:
ISBN:
Category :
Languages : en
Pages : 7
Book Description
We summarize here the results of the ''counting experiments'' by the CDF Collaboration in the search of t{bar t} production in p{bar p} collisions at (square root)s = 1800 TeV at the Tevatron. We analyze their statistical significance by calculating the probability that the observed excess is a fluctuation of the expected backgrounds, and assuming the excess is from top events, extract a measurement of the t{bar t} production cross-section.
Measurement of the T Tbar Production Cross Section at
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
We report on the results from the analyses of[ital t][ital[anti t]] decays in[ital dilepton] and[ital lepton+jets] modes with[approx]100 pb[sup -1] of[ital p][ital[anti p]] Collider data at[radical]s= 1.8 TeV collected by the D[null] experiment at the Fermilab Tevatron. We have observed 37[ital t][ital[anti t]] candidate events while the estimated background is 13.4[+-] 3.0 events. The[ital t][ital[anti t]] production cross section has been measured to be 5.2[+-] 1.8 pb at a top quark mass of 170 GeV/c[sup 2].
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
We report on the results from the analyses of[ital t][ital[anti t]] decays in[ital dilepton] and[ital lepton+jets] modes with[approx]100 pb[sup -1] of[ital p][ital[anti p]] Collider data at[radical]s= 1.8 TeV collected by the D[null] experiment at the Fermilab Tevatron. We have observed 37[ital t][ital[anti t]] candidate events while the estimated background is 13.4[+-] 3.0 events. The[ital t][ital[anti t]] production cross section has been measured to be 5.2[+-] 1.8 pb at a top quark mass of 170 GeV/c[sup 2].
Measurement of the T{bar T} Production Cross Section at the Tevatron
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 7
Book Description
We report on the measurement of the t{anti t} production cross section obtained by CDF and D0 experiments with p{anti p} collisions at √s=1. 8 TeV. The analyses presented here refer to ∫ Ldt ≈11O pb−1 collected at the Fermilab Tevatron collider during the run 1992-96. About 85% of the possible t{anti t} decays have been studied in different channels classified according to the number of high P{sub T} leptons found in the final state. The production cross section has been measured in each individual channel and then combined into a single value for each experiment, which is [sigma]{sub tt} = 7.5{sup 1.9}{sub 1.6} pb for CDF and [sigma]{sub tt} = 5.77 ± 1.76 pb for D0.
Publisher:
ISBN:
Category :
Languages : en
Pages : 7
Book Description
We report on the measurement of the t{anti t} production cross section obtained by CDF and D0 experiments with p{anti p} collisions at √s=1. 8 TeV. The analyses presented here refer to ∫ Ldt ≈11O pb−1 collected at the Fermilab Tevatron collider during the run 1992-96. About 85% of the possible t{anti t} decays have been studied in different channels classified according to the number of high P{sub T} leptons found in the final state. The production cross section has been measured in each individual channel and then combined into a single value for each experiment, which is [sigma]{sub tt} = 7.5{sup 1.9}{sub 1.6} pb for CDF and [sigma]{sub tt} = 5.77 ± 1.76 pb for D0.
Measurement of the T-tbar Production Cross Section in the CDF Detector
Author: Jose Enrique Palencia Cortezón
Publisher:
ISBN: 9783838338545
Category :
Languages : en
Pages : 176
Book Description
Publisher:
ISBN: 9783838338545
Category :
Languages : en
Pages : 176
Book Description
Measurement of the T Anti-t Production Cross-section at S**ư
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 4
Book Description
A measurement of the t{bar t} production cross section at √s = 1.96 TeV in the dilepton final states using a lepton+track selection and secondary vertex b-tagging is presented. One of the two leptons from the decay of the t{bar t} pair is allowed to be identified only as an isolated track to improve the selection efficiency. The result is combined with a measurement in the t{bar t} → e? final state. The measurements are based on 370 pb−1 of data collected with the D0 experiment at the Tevatron collider. The preliminary cross section obtained in the combined lepton+track and e? channel is:?{sub t{bar t}} = 8.6{sub -1.7}{sup +1.9}(stat) ± 1.1(syst) ± 0.6(lumi) pb.
Publisher:
ISBN:
Category :
Languages : en
Pages : 4
Book Description
A measurement of the t{bar t} production cross section at √s = 1.96 TeV in the dilepton final states using a lepton+track selection and secondary vertex b-tagging is presented. One of the two leptons from the decay of the t{bar t} pair is allowed to be identified only as an isolated track to improve the selection efficiency. The result is combined with a measurement in the t{bar t} → e? final state. The measurements are based on 370 pb−1 of data collected with the D0 experiment at the Tevatron collider. The preliminary cross section obtained in the combined lepton+track and e? channel is:?{sub t{bar t}} = 8.6{sub -1.7}{sup +1.9}(stat) ± 1.1(syst) ± 0.6(lumi) pb.
Measurement of the T Anti-t Production Cross-section at S**(1/2)
Author: Sara Lager
Publisher:
ISBN:
Category :
Languages : en
Pages : 4
Book Description
A measurement of the t{bar t} production cross section at {radical}s = 1.96 TeV in the dilepton final states using a lepton+track selection and secondary vertex b-tagging is presented. One of the two leptons from the decay of the t{bar t} pair is allowed to be identified only as an isolated track to improve the selection efficiency. The result is combined with a measurement in the t{bar t} {yields} e{mu} final state. The measurements are based on 370 pb{sup -1} of data collected with the D0 experiment at the Tevatron collider. The preliminary cross section obtained in the combined lepton+track and e{mu} channel is: {sigma}{sub t{bar t}} = 8.6{sub -1.7}{sup +1.9}(stat) {+-} 1.1(syst) {+-} 0.6(lumi) pb.
Publisher:
ISBN:
Category :
Languages : en
Pages : 4
Book Description
A measurement of the t{bar t} production cross section at {radical}s = 1.96 TeV in the dilepton final states using a lepton+track selection and secondary vertex b-tagging is presented. One of the two leptons from the decay of the t{bar t} pair is allowed to be identified only as an isolated track to improve the selection efficiency. The result is combined with a measurement in the t{bar t} {yields} e{mu} final state. The measurements are based on 370 pb{sup -1} of data collected with the D0 experiment at the Tevatron collider. The preliminary cross section obtained in the combined lepton+track and e{mu} channel is: {sigma}{sub t{bar t}} = 8.6{sub -1.7}{sup +1.9}(stat) {+-} 1.1(syst) {+-} 0.6(lumi) pb.
Measurements of the T Anti-t Production Cross Section at the Tevatron Run II CDF Experiment Using B-tagging
Author: Henri Bachacou
Publisher:
ISBN:
Category :
Languages : en
Pages : 3
Book Description
We present measurements of the top-antitop production cross section in b-tagged lepton + jets events from proton-antiproton collisions at 1.96 TeV using the CDF detector at Fermilab. B-jets are tagged with either a secondary vertex algorithm, or a soft lepton tagger that identifies muons from B hadron semileptonic decays. With Tevatron Run II data, we estimate the top-antitop signal fraction in two different ways: by estimating the various background contributions, and by fitting directly the leading jet transverse energy spectrum for the signal and background contributions. A subset of the sample with two secondary vertex tagged jets yields a production cross section consistent with the inclusive measurements. Results are consistent with a Standard Model top-antitop signal and current measurements of the top quark mass.
Publisher:
ISBN:
Category :
Languages : en
Pages : 3
Book Description
We present measurements of the top-antitop production cross section in b-tagged lepton + jets events from proton-antiproton collisions at 1.96 TeV using the CDF detector at Fermilab. B-jets are tagged with either a secondary vertex algorithm, or a soft lepton tagger that identifies muons from B hadron semileptonic decays. With Tevatron Run II data, we estimate the top-antitop signal fraction in two different ways: by estimating the various background contributions, and by fitting directly the leading jet transverse energy spectrum for the signal and background contributions. A subset of the sample with two secondary vertex tagged jets yields a production cross section consistent with the inclusive measurements. Results are consistent with a Standard Model top-antitop signal and current measurements of the top quark mass.
Recueil factice de coupures de presse parues dans la Gazette de l'Hôtel Drouot, relatives à des ventes aux enchères publiques, ayant eu lieu du 4 juin au 28 septembre 1930. Paris et province
Single Top Production and Top Properties at the Tevatron
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
We summarize recent measurements made at the Tevatron Collider using top event candidates. Cross section and mass measurements are discussed in a separate contribution to these Proceedings. Here we report on studies of the top PT distribution in t{anti t} production and studies of single top production. Properties of top decays examined are: BF(t --> Wb)/BF(t --> Wq), helicity amplitudes of W's from top decays and correlations of t{anti t} decay products. Searches for new physics in rare top decays and a search for a state X --> t{anti t} are also reported.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
We summarize recent measurements made at the Tevatron Collider using top event candidates. Cross section and mass measurements are discussed in a separate contribution to these Proceedings. Here we report on studies of the top PT distribution in t{anti t} production and studies of single top production. Properties of top decays examined are: BF(t --> Wb)/BF(t --> Wq), helicity amplitudes of W's from top decays and correlations of t{anti t} decay products. Searches for new physics in rare top decays and a search for a state X --> t{anti t} are also reported.