Top Quark Mass Measurement Using The Template Method In The Lepton Jets Channel At Cdf Ii PDF Download
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| Release | : 2011 |
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Download Top Quark Mass Measurement Using the Template Method at CDF. Book in PDF, ePub and Kindle
We present a measurement of the top quark mass in the lepton+jets and dilepton channels of t{bar t} decays using the template method. The data sample corresponds to an integrated luminosity of 5.6 fb−1 of p{bar p} collisions at Tevatron with √s = 1.96 TeV, collected with the CDF II detector. The measurement is performed by constructing templates of three kinematic variables in the lepton+jets and two kinematic variables in the dilepton channel. The variables are two reconstructed top quark masses from different jets-to-quarks combinations and the invariant mass of two jets from the W decay in the lepton+jets channel, and a reconstructed top quark mass and m{sub T2}, a variable related to the transverse mass in events with two missing particles, in the dilepton channel. The simultaneous fit of the templates from signal and background events in the lepton+jets and dilepton channels to the data yields a measured top quark mass of M{sub top} = 172.1 ± 1.1 (stat) ± 0.9 (syst) GeV/c2.
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| Total Pages | : 77 |
| Release | : 2005 |
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Download Top Quark Mass Measurement Using the Template Method in the Lepton + Jets Channel at CDF II. Book in PDF, ePub and Kindle
| Author | : T. Maruyama |
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| Total Pages | : 18 |
| Release | : 2006 |
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Download Measurement of the Top Quark Mass Using the Template Method in the Lepton Plus Jets Channel with in Situ W ---] J J Calibration at CDF-II. Book in PDF, ePub and Kindle
We report an updated measurement of the top quark mass in the lepton plus jets channel of t{bar t} events from p{bar p} collisions at {radical}s = 1.96 TeV. This measurement uses a dataset with integrated luminosity of 680 pb{sup -1}, containing 360 t{bar t} candidates separated into four subsamples. A top quark mass is reconstructed for each event by using energy and momentum constraints on the top quark pair decay products. We also employ the reconstructed mass of hadronic W boson decays W {yields} jj to constrain in situ the largest systematic uncertainty of the top quark mass measurement: the jet energy scale. Monte Carlo templates of the reconstructed top quark and W boson mass are produced as a function of the true top quark mass and the jet energy scale. The distribution of reconstructed top quark and W boson mass in the data are compared to the Monte Carlo templates using a likelihood fit to obtain: M{sub top} = 173.4 {+-} 2.8 GeV/c{sup 2}.
| Author | : Jahred Adelman |
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| Total Pages | : 320 |
| Release | : 2008 |
| Genre | : Particles (Nuclear physics) |
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Download Measurement of the Top Quark Mass at CDF Using the Template Method in the Lepton+Jets Channel Book in PDF, ePub and Kindle
| Author | : John Freeman |
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| Total Pages | : 3 |
| Release | : 2004 |
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Download CDF Measurement of the Top Quark Mass in the Lepton + Jets Channel Using the Multivariate Template Method Book in PDF, ePub and Kindle
The authors measure the mass of the top quark using 162 pb{sup -1} of data collected by the CDF experiment at FNAL in Run II. The decay chain t{bar t} {yields} bq{bar q}{bar b}lv is studied using a novel technique called the Multivariate Template Method (MTM). Using this technique they obtain a result of M{sub top} = 179.6{sub -6.3}{sup +6.4} {+-} 6.8 GeV/c{sup 2} for the top quark.
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| Total Pages | : 174 |
| Release | : 2008 |
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Download Measurement of the Top Quark Mass at CDF Using the Template Method in the Lepton + Jets Channel Book in PDF, ePub and Kindle
A measurement of the top quark mass in p{bar p} collisions at (square root)s = 1.96 TeV is presented. The analysis uses a template method, in which the overconstrained kinematics of the Lepton+Jets channel of the t{bar t} system are used to measure a single quantity, the reconstructed top quark mass, that is strongly correlated with the true top quark mass. in addition, the dijet mass of the hadronically decaying W boson is used to constrain in situ the uncertain jet energy scale in the CDF detector. Two-dimensional probability density functions are derived using a kernel density estimate-based machinery. Using 1.9 fb−1 of data, the top quark mass is measured to be 171.8{sub -1.9}{sup +1.9}(stat.) ± 1.0(syst.)GeV/c2.
| Author | : Bodhitha Anjalike Jayatilaka |
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| Total Pages | : 272 |
| Release | : 2006 |
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Download A Measurement of the Top Quark Mass in the Dilepton Decay Channel at CDF II. Book in PDF, ePub and Kindle
| Author | : Arnulf Quadt |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 166 |
| Release | : 2007-08-16 |
| Genre | : Science |
| ISBN | : 3540710604 |
Download Top Quark Physics at Hadron Colliders Book in PDF, ePub and Kindle
This will be a required acquisition text for academic libraries. More than ten years after its discovery, still relatively little is known about the top quark, the heaviest known elementary particle. This extensive survey summarizes and reviews top-quark physics based on the precision measurements at the Fermilab Tevatron Collider, as well as examining in detail the sensitivity of these experiments to new physics. Finally, the author provides an overview of top quark physics at the Large Hadron Collider.
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| Total Pages | : 9 |
| Release | : 2011 |
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Download Measurement of the Top-quark Mass in the Lepton+jets Channel Using a Matrix Element Technique with the CDF II Detector Book in PDF, ePub and Kindle
A measurement of the top-quark mass is presented using Tevatron data from proton-antiproton collisions at center-of-mass energy √ = 1.96 TeV collected with the CDF II detector. Events are selected from a sample of candidates for production of t{bar t} pairs that decay into the lepton+jets channel. The top-quark mass is measured with an unbinned maximum likelihood method where the event probability density functions are calculated using signal and background matrix elements, as well as a set of parameterized jet-to-parton transfer functions. The likelihood function is maximized with respect to the top-quark mass, the signal fraction in the sample, and a correction to the jet energy scale (JES) calibration of the calorimeter jets. The simultaneous measurement of the JES correction ([Delta]{sub JES}) amounts to an additional in situ jet energy calibration based on the known mass of the hadronically decaying W boson. Using the data sample of 578 lepton+jets candidate events, corresponding to 3.2 fb−1 of integrated luminosity, the top-quark mass is measured to be m{sub t} = 172.4 ± 1.4 (stat + [Delta]{sub JES}) ± 1.3 (syst) GeV/c2.
| Author | : Ian Brock |
| Publisher | : John Wiley & Sons |
| Total Pages | : 437 |
| Release | : 2011-05-04 |
| Genre | : Science |
| ISBN | : 3527634975 |
Download Physics at the Terascale Book in PDF, ePub and Kindle
Written by authors working at the forefront of research, this accessible treatment presents the current status of the field of collider-based particle physics at the highest energies available, as well as recent results and experimental techniques. It is clearly divided into three sections; The first covers the physics -- discussing the various aspects of the Standard Model as well as its extensions, explaining important experimental results and highlighting the expectations from the Large Hadron Collider (LHC). The second is dedicated to the involved technologies and detector concepts, and the third covers the important - but often neglected - topics of the organisation and financing of high-energy physics research. A useful resource for students and researchers from high-energy physics.
