Measurement Of The Tt Production Cross Section In The Lepton Plus Jets Channel In P P Collisions At Square Root 8

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Measurement Of The Tt Production Cross Section In The Lepton Plus Jets Channel In P P Collisions At Square Root 8

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Author : Chyi-Chang Miao
language : en
Publisher:
Release Date : 1997

Measurement Of The Tt Production Cross Section In The Lepton Plus Jets Channel In P P Collisions At Square Root 8 written by Chyi-Chang Miao and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.

Measurement Of The Tt Production Cross Section In Pp Collisions At Square Root S

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Author : Heather L. Ray
language : en
Publisher:
Release Date : 2004

Measurement Of The Tt Production Cross Section In Pp Collisions At Square Root S written by Heather L. Ray 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.

Measurement Of The Top Quark Mass From B Tagged Events In The Lepton Plus Jets Channel In Pp Collisions At Square Root Of S

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Author : Nathan Robert-Claire Eddy
language : en
Publisher:
Release Date : 1999

Measurement Of The Top Quark Mass From B Tagged Events In The Lepton Plus Jets Channel In Pp Collisions At Square Root Of S written by Nathan Robert-Claire Eddy and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with categories.

Measurement Of The Ttbar Production Cross Section In The All Jets Final State In Pp Collisions At Sqrt S

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Author :
language : en
Publisher:
Release Date : 2015

Measurement Of The Ttbar Production Cross Section In The All Jets Final State In Pp 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 2015 with categories.

The cross section for tt production in the all-jets final state is measured in pp collisions at a centre-of-mass energy of 8 TeV at the LHC with the CMS detector, in data corresponding to an integrated luminosity of 18.4 fb-1. The inclusive cross section is found to be 275.6 ±6.1 (stat) ± 37.8 (syst) ± 7.2 (lumi) pb. The normalized differential cross sections are measured as a function of the top quark transverse momenta, pT, and compared to predictions from quantum chromodynamics. The results are reported at detector, parton, and particle levels. In all cases, the measured top quark pT spectra are significantly softer than theoretical predictions.

Measurements Of The T Tbar Production Cross Section In Lepton Jets Final States In Pp Collisions At 8 Tev And Ratio Of 8 To 7 Tev Cross Sections

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Author :
language : en
Publisher:
Release Date : 2016

Measurements Of The T Tbar Production Cross Section In Lepton Jets Final States In Pp Collisions At 8 Tev And Ratio Of 8 To 7 Tev Cross Sections written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.

A measurement of the top quark pair production (t-tbar) cross section in proton-proton collisions at the centre-of-mass energy of 8 TeV is presented using data collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 19.6 inverse-femtobarns. This analysis is performed in the t-tbar decay channels with one isolated, high transverse momentum electron or muon and at least four jets, at least one of which is required to be identified as originating from hadronization of a b quark. The calibration of the jet energy scale and the efficiency of b jet identification are determined from data. The measured t-tbar cross section is 228.5 +/- 3.8 (stat) +/- 13.7 (syst) +/- 6.0 (lumi) pb. This measurement is compared with an analysis of 7 TeV data, corresponding to an integrated luminosity of 5.0 inverse-femtobarns, to determine the ratio of 8 TeV to 7 TeV cross sections, which is found to be 1.43 +/- 0.04 (stat) +/- 0.07 (syst) +/- 0.05 (lumi). The measurements are in agreement with QCD predictions up to next-to-next-to-leading order.

Measurements Of The Tt Production Cross Section In Lepton Jets Final States In Pp Collisions At 8 Tev And Ratio Of 8 To 7 Tev Cross Sections

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Author : CMS Collaboration
language : en
Publisher:
Release Date : 2016

Measurements Of The Tt Production Cross Section In Lepton Jets Final States In Pp Collisions At 8 Tev And Ratio Of 8 To 7 Tev Cross Sections written by CMS Collaboration and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.

Measurement Of Tt Production Cross Section In Pp Collisions At Square Root S

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Author : Harpreet Singh
language : en
Publisher:
Release Date : 1999

Measurement Of Tt Production Cross Section In Pp Collisions At Square Root S written by Harpreet Singh and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Collisions (Nuclear physics) categories.

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.

Measurement Of The Ttbar Production Cross Section In Ppbar Collisions At Sqrt S

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Author :
language : en
Publisher:
Release Date : 2010

Measurement Of The Ttbar Production Cross Section 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 2010 with categories.

We present a measurement of the top quark pair production cross section in p{bar p} collisions at √s = 1.96 TeV using a data sample corresponding to 1.7 fb−1 of integrated luminosity collected with the Collider Detector at Fermilab. We reconstruct t{bar t} events in the lepton+jets channel, consisting of e[nu]+jets and [mu][nu]+jets final states. The dominant background is the production of W bosons in association with multiple jets. To suppress this background, we identify electrons from the semileptonic decay of heavy-flavor jets ('soft electron tags'). From a sample of 2196 candidate events, we obtain 120 tagged events with a background expectation of 51 ± 3 events, corresponding to a cross section of [sigma]{sub t{bar t}} = 7.8 ± 2.4 (stat) ± 1.6 (syst) ± 0.5 (lumi) pb. We assume a top-quark mass of 175 GeV/c2. This is the first measurement of the t{bar t} cross section with soft electron tags in Run II of the Tevatron.

Measurement Of The Inclusive And Fiducial Tt Production Cross Sections In The Lepton Jets Channel In Pp Collisions At S

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Author : Arwa Bannoura
language : en
Publisher:
Release Date : 2018

Measurement Of The Inclusive And Fiducial Tt Production Cross Sections In The Lepton Jets Channel In Pp Collisions At S written by Arwa Bannoura and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.