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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.

A measurement of the production of jets in association with a W boson in proton-antiproton collisions at the Tevatron using data collected with the CDF experiment

Cooper, Ben David January 2006 (has links)
A measurement of the differential pp W+ > n jets production cross-section with respect to a range of different jet kinematic variables is presented. The W is required to decay leptonically to an electron and neutrino, and the kinematics of the decay products are restricted such that the electron Px > 20 GeV, electron 77 30 GeV and the W transverse mass > 20 GeV/c2. Jets are defined using the CDF JetClu cone algorithm with a radius of R = 0.4, requiring 77jet 15 GeV. The jet energies are corrected individually such that they are on average equal to the energy of the hadrons within the jet, with additional correction factors being applied to account for the impact of detector resolution on the jet spectra. The differential cross-section is measured with respect to the first, second, third and fourth jet Ex spectra, the separation in R and the invariant mass of the two leading jets. In addition, the jet Ex measurements can be integrated to form W+ > n Jets cross-section measurements for 1,2,3 and 4 jets with a range of minimum jet Ex requirements, the lowest being 15 GeV. These cross-section results are compared to Enhanced Leading Order (ELO) W + jets theoretical predictions and predictions made using the leading order CKKW and MLM matching prescriptions. The ELO predictions are not suited to describing the absolute rate of W + jet production, but display success in reproducing certain relative rates, dependent on the choice of renormalisation scale. The comparisons with matching prescriptions indicate that these new approaches could be used successfully to improve W + Jets LO predictions.

The global calorimeter trigger for CMS and a study of sensitivity limits in neural triple gauge boson vertices

Machin, D. January 2004 (has links)
No description available.

The three-body formation of ⁹Be : an alternative to the triple-α process

Brown, Thomas Alastair Dundas January 2005 (has links)
No description available.

Search for Randall-Sundrum gravitions in 1.2 fb⁻¹ of Run II high mass diphoton data at CDF

Wynne, Sara-Madge January 2007 (has links)
No description available.

A branching fraction and CP asymmetry measurement of Bο--> ροKοS at the BABAR experiment

Forster, Ian J. January 2006 (has links)
No description available.

The low-energy phenomenology of a supersymmetric extension of the standard model

Parry, Jonathan Keith January 2003 (has links)
No description available.

Dynamics of trapped ions and progress towards the study of the quantum Zeno effect

Vincent, James Ross January 2002 (has links)
No description available.

A measurement of the branching fractions and CP asymmetries for the decays B'± → K *'± π⁰ and B'± → ρ±π⁰ at BABAR

Gaillard, James Robert January 2005 (has links)
No description available.

Measuring the jet response and the search for the Higgs Boson in the channel ZH→ e⁺e⁻bb̅ with the DØ

Petteni, Michele January 2003 (has links)
No description available.

Ring imaging Cherenkov counters for LHCb

Simmons, Brinick Matthew Christophe January 2003 (has links)
No description available.

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