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Two-photon physics

Description: A new experimental frontier has recently been opened to the study of two photon processes. The first results of many aspects of these reactions are being presented at this conference. In contrast, the theoretical development of research ito two photon processes has a much longer history. This talk reviews the many different theoretical ideas which provide a detailed framework for our understanding of two photon processes.
Date: October 1, 1981
Creator: Bardeen, W.A.
Partner: UNT Libraries Government Documents Department
open access

Anomalies

Description: Anomalies have a diverse impact on many aspects of physical phenomena. The role of anomalies in determining physical structure from the amplitude for decay to the foundations of superstring theory will be reviewed. 36 refs.
Date: August 1, 1985
Creator: Bardeen, W.A.
Partner: UNT Libraries Government Documents Department
open access

Photon structure function - theory

Description: The theoretical status of the photon structure function is reviewed. Particular attention is paid to the hadronic mixing problem and the ability of perturbative QCD to make definitive predictions for the photon structure function. 11 references.
Date: December 1, 1984
Creator: Bardeen, W.A.
Partner: UNT Libraries Government Documents Department
open access

Weak decay amplitudes in large N/sub c/ QCD

Description: A systematic analysis of nonleptonic decay amplitudes is presented using the large N/sub c/ expansion of quantum chromodynamics. In the K-meson system, this analysis is applied to the calculation of the weak decay amplitudes, weak mixing and CP violation. 10 refs., 5 figs., 2 tabs.
Date: October 1, 1988
Creator: Bardeen, W.A.
Partner: UNT Libraries Government Documents Department
open access

Photon structure function

Description: Theoretical understanding of the photon structure function is reviewed. As an illustration of the pointlike component, the parton model is briefly discussed. However, the systematic study of the photon structure function is presented through the framework of the operator product expansion. Perturbative QCD is used as the theoretical basis for the calculation of leading contributions to the operator product expansion. The influence of higher order QCD effects on these results is discussed. Recen… more
Date: November 1, 1980
Creator: Bardeen, W.A.
Partner: UNT Libraries Government Documents Department
open access

Dynamics of symmetry breaking in strongly coupled QED

Description: I review the dynamical structure of strong coupled QED in the quenched planar limit. The symmetry structure of this theory is examined with reference to the nature of both chiral and scale symmetry breaking. The renormalization structure of the strong coupled phase is analysed. The compatibility of spontaneous scale and chiral symmetry breaking is studied using effective lagrangian methods. 14 refs., 3 figs.
Date: October 1, 1988
Creator: Bardeen, W.A.
Partner: UNT Libraries Government Documents Department
open access

Infrared fixed point solution for the top quark mass and unification of couplings in the MSSM

Description: We analyze the implications of the infrared quasi fixed point solution for the top quark mass in the Minimal Supersymmetric Standard Model. This solution could explain in a natural way the relatively large value of the top quark mass and, if confirmed experimentally, may be suggestive of the onset of nonperturbative physics at very high energy scales. In the framework of grand unification, the expected bottom quark -- tau lepton Yukawa coupling unification is very sensitive to the fixed point s… more
Date: August 1, 1993
Creator: Bardeen, W.A.; Carena, M.; Pokorski, S. & Wagner, C.E.M.
Partner: UNT Libraries Government Documents Department
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