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Beyond Higgs

Description: I discuss the Standard Model of Elementary Particle Physics and potential for discoveries of the physics responsible for electroweak symmetry breaking. I review the ideas leading to development of the Brout-Englert-Higgs mechanism that now forms the basis for the conventional Standard Model. I discuss various issues that challenge application of the Standard Model to the known physics of elementary particles. I examine alternatives to the Standard Model that address these issues and may lead to new discoveries at the LHC that go Beyond Higgs.
Date: May 1, 2008
Creator: Bardeen, William A.
Partner: UNT Libraries Government Documents Department

Weak Mixing and Rare Decays in the Littlest Higgs Model

Description: Little Higgs models have been introduced to resolve the fine-tuning problems associated with the stability of the electroweak scale and the constraints imposed by the precision electroweak analysis of experiments testing the Standard Model of particle physics. Flavor physics provides a sensitive probe of the new physics contained in these models at next-to-leading order.
Date: March 1, 2007
Creator: Bardeen, William A.
Partner: UNT Libraries Government Documents Department

Heavy-light mesons and chiral symmetry

Description: The chiral structure of heavy-light mesons is explored with a particular focus on the nature of the D{sub sJ} charmed mesons. Theoretical predictions for the hadronic and radiative decays of these mesons are compared to recent experimental data.
Date: April 1, 2008
Creator: Bardeen, William A.
Partner: UNT Libraries Government Documents Department

Anomalies

Description: I discuss the role of anomalies in the modern development of quantum field theory and their implications for physics.
Date: February 15, 1999
Creator: Bardeen, William A.
Partner: UNT Libraries Government Documents Department

On the large Nc expansion in quantum chromodynamics

Description: The author discusses methods based on the large Nc expansion to study nonperturbative aspects of quantum chromodynamics, the theory of the strong force. The author applies these methods to the analysis of weak decay processes and the nonperturbative computation of the weak matrix elements needed for a complete evaluation of these decays in the Standard Model of elementary particle physics.
Date: December 28, 2001
Creator: Bardeen, William A.
Partner: UNT Libraries Government Documents Department

Weak matrix elements in the large N{sub c} limit

Description: The matrix elements of the four quark operators needed to predict many weak interaction processes can be evaluated using the large N{sub c} limit of quantum chromodynamics. At leading order in the large N{sub c} expansion, the weak matrix elements of four quark operators factorize into independent matrix elements of two quark operators, a common approximation being used today. At the next leading order, the weak matrix elements acquire the leading scale and scheme dependence expected for these matrix elements in full QCD. They discuss methods to evaluate these matrix elements which involve matching perturbative QCD calculations at short distance to non-perturbative hadronic matrix elements at long distance.
Date: October 15, 1999
Creator: Bardeen, William A.
Partner: UNT Libraries Government Documents Department

Electroweak Symmetry Breaking: Top Quard Condensates

Description: The fundamental mechanisms for the dynamical breaking of the electroweak gauge symmetries remain a mystery. This paper examines the possible role of heavy fermions, particularly the top quark, in generating the observed electroweak symmetry breaking, the masses of the W and Z bosons and the masses of all observed quarks and leptons. 27 refs., 10 figs., 4 tabs.
Date: December 1990
Creator: Bardeen, William A.
Partner: UNT Libraries Government Documents Department