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| Total Pages | : 7 |
| Release | : 1997 |
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Download Top Quark Mass and Production from CDF. Book in PDF, ePub and Kindle
We present the latest results about the top quark obtained by the CDF experiment using a data sample of about 110 pb−1 collected at the Fermilab Tevatron collider. We briefly describe the production cross section determination and the top mass measurement. Finally we review the search for the top quark in rare decay channels and the first direct calculation of the CKM matrix element V{sub tb}.
| 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 | : 8 |
| Release | : 1995 |
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Download CDF Top Quark Production and Mass Book in PDF, ePub and Kindle
The top search in the dilepton and lepton plus jets channels with the Collider Detector at Fermilab is presented. The analysis uses a 67 pb−1 sample of p{bar p} collisions at 1.8 TeV. A 4.8[sigma] excess of candidate events establishes the existence of the top quark. The t{bar t} production cross section is measured to be [sigma]{sub t{bar t}} = 7.6{sub -2.0}{sup +2.4} pb with branching Br(t → Wb) = 0.87{sub -0.30}{sup +0.13}(stat) {sub -0.11}{sup +0.13}(syst). The measured mass is M{sub top} = 176±8±10 GeV.
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| Total Pages | : 6 |
| Release | : 2004 |
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Download Top Quark Physics at CDF. Book in PDF, ePub and Kindle
The existence of the top quark, discovered by CDF and D0 in 1995, has been re-established in the burgeoning dataset being collected in Run 2 of the Tevatron at Fermilab. Results from CDF on the top quark production cross section and top quark mass are consistent with the Standard Model expectations. The well-characterized top data samples will make it possible in the future to probe further for new physics in the top quark sector. This report summarizes recent CDF top quark physics results.
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| Release | : 1999 |
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Download Top Mass and Cross Section Results from CDF and D0 at the Fermilab Tevatron Book in PDF, ePub and Kindle
Measurements of the top quark mass and the t{bar t} production cross section, obtained by CDF and D0 Collaborations at the Tevatron, are presented. The methodology of analyses and their underlying assumptions are summarized. The CDF and D0 top mass averages, based on H"00 pb−1 of data collected by each experiment in Run-I, and obtained from a set of selected measurements in several channels are M{sub t} = 176:0 ± 4:0(stat) ± 5:1(syst) GeV/c{sup 2} and M{sub t} = 172:1 ± 5:2(stat) ± 4:9(syst) GeV/c{sup 2}, respectively. The combined Tevatron top quark mass is M{sub t} = 174:3 ±3:2(stat) ±4:0(syst) GeV/c}sup 2}, where the correlations between CDF and D0 averages were taken into account. The CDF measurement of the t{bar t} cross section (assuming M{sub t} = 175 GeV/c{sup 2}) is [sigma]{sub tt} = 7.6{sup 1.8}{sub 1.5} pb, and the D0 value (assuming M{sub t} = 172.1 GeV/c{sup 2}) is [sigma]{sub tt} = 5:9 ± 1:7 pb. In anticipation of the much increased statistics in Run-II, the fact that top quark physics is one of the best windows to new physics beyond the Standard Model is emphasized.
| Author | : Andrew N. Kovalev |
| Publisher | : |
| Total Pages | : 176 |
| Release | : 2005 |
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Download Measurement of the Top Quark Mass at CDF II Book in PDF, ePub and Kindle
| Author | : Alexander Grohsjean |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 155 |
| Release | : 2010-10-01 |
| Genre | : Science |
| ISBN | : 364214070X |
Download Measurement of the Top Quark Mass in the Dilepton Final State Using the Matrix Element Method Book in PDF, ePub and Kindle
The main pacemakers of scienti?c research are curiosity, ingenuity, and a pinch of persistence. Equipped with these characteristics a young researcher will be s- cessful in pushing scienti?c discoveries. And there is still a lot to discover and to understand. In the course of understanding the origin and structure of matter it is now known that all matter is made up of six types of quarks. Each of these carry a different mass. But neither are the particular mass values understood nor is it known why elementary particles carry mass at all. One could perhaps accept some small generic mass value for every quark, but nature has decided differently. Two quarks are extremely light, three more have a somewhat typical mass value, but one quark is extremely massive. It is the top quark, the heaviest quark and even the heaviest elementary particle that we know, carrying a mass as large as the mass of three iron nuclei. Even though there exists no explanation of why different particle types carry certain masses, the internal consistency of the currently best theory—the standard model of particle physics—yields a relation between the masses of the top quark, the so-called W boson, and the yet unobserved Higgs particle. Therefore, when one assumes validity of the model, it is even possible to take precise measurements of the top quark mass to predict the mass of the Higgs (and potentially other yet unobserved) particles.
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| Total Pages | : 8 |
| Release | : 2008 |
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Download Measurements of the Top Quark Mass at CDF. Book in PDF, ePub and Kindle
| Author | : |
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| Total Pages | : 17 |
| Release | : 2009 |
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Download Measurement of the Top Quark Mass at CDF Using the Ǹeutrino Phi Weighting' Template Method on a Lepton Plus Isolated Track Sample Book in PDF, ePub and Kindle
We present a measurement of the top quark mass with t{bar t} dilepton events produced in p{bar p} collisions at the Fermilab Tevatron (√s = 1.96 TeV) and collected by the CDF II detector. A sample of 328 events with a charged electron or muon and an isolated track, corresponding to an integrated luminosity of 2.9 fb−1, are selected as t{bar t} candidates. To account for the unconstrained event kinematics, we scan over the phase space of the azimuthal angles (?{sub {nu}1},?{sub {nu}2}) of neutrinos and reconstruct the top quark mass for each?{sub {nu}1},?{sub {nu}2} pair by minimizing a?2 function in the t{bar t} dilepton hypothesis. We assign?2-dependent weights to the solutions in order to build a preferred mass for each event. Preferred mass distributions (templates) are built from simulated t{bar t} and background events, and parameterized in order to provide continuous probability density functions. A likelihood fit to the mass distribution in data as a weighted sum of signal and background probability density functions gives a top quark mass of 165.5{sub -3.3}{sup +3.4}(stat.)±3.1(syst.) GeV/c2.
| Author | : Jahred Adelman |
| Publisher | : |
| 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
