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Full-Text Articles in Physics

Quark-Antiquark Condensates In Strong Magnetic Fields, Alec Schramm, Berndt Muller, Stefan Schramm Apr 1992

Quark-Antiquark Condensates In Strong Magnetic Fields, Alec Schramm, Berndt Muller, Stefan Schramm

Alec J Schramm

We discuss the effect of large external magnetic fields on the QCD vacuum structure. We show that the deformed vacuum leads to substantial changes in the hadronic spectrum.


W Boson Condensation In P-P Collisions?, Alec Schramm, Stefan Schramm, Berndt Muller Feb 1992

W Boson Condensation In P-P Collisions?, Alec Schramm, Stefan Schramm, Berndt Muller

Alec J Schramm

We address the question of whether W+/- boson condensation can occur in high-energy collisions.


Theoretical Study Of Electron-Phonon Interaction In Β-Phase Niti And Ni-Al Alloys , Guang-Lin Zhao Jan 1992

Theoretical Study Of Electron-Phonon Interaction In Β-Phase Niti And Ni-Al Alloys , Guang-Lin Zhao

Retrospective Theses and Dissertations

NiTi and Ni-Al alloys are two well known examples of materials which exhibit martensitic phase transformations, with the equiatomic NiTi alloy especially well known as the best shape memory material. At high temperature, both alloys possess the CsCl-type or B2 structure with a simple cubic (SC) lattice. They are often called [beta]-phase alloys. As temperature is lowered, the [beta]-phase NiTi and Ni-Al alloys undergo premartensitic phase transformations or premartensitic anomalies before the martensitic phase transformation. Neutron scattering measurements have found that the TA[subscript]2 (110) phonon modes in the [beta]-phases are temperature dependent and exhibit anomalous ...


Distortions Of Parton Distributions Due To Multiquark Effects , Athanasios Petridis Jan 1992

Distortions Of Parton Distributions Due To Multiquark Effects , Athanasios Petridis

Retrospective Theses and Dissertations

It has been observed that the momentum distributions of partons in bound nuclei are distorted relative to those of free protons and neutrons. This phenomenon was first observed in deep inelastic scattering experiments with muon and neutrino beams on nuclear targets and is known as the EMC effect. Similar phenomena have been observed in other high energy interactions such as the Drell-Yan process, the hadroproduction of direct photons, and the resonance production of charmonium and bottomonium states. In this work we investigate the possibility that these effects are predominantly of partonic origin. Standard nuclear quantum mechanics predicts that there is ...


A Study Of Isolated Photons In Z0 Hadronic Decays Using The Delphi Detector At Lep , Randall R. Holmes Jan 1992

A Study Of Isolated Photons In Z0 Hadronic Decays Using The Delphi Detector At Lep , Randall R. Holmes

Retrospective Theses and Dissertations

We present a study of the production of energetic isolated photons in the reaction e[superscript]+e[superscript]-→ Z[superscript]0→ q[macron]q[gamma] using the DELPHI detector at LEP. Within the context of the Standard Model, our results for final state radiation show no evidence for anomolous photon production due to rare or new processes. We present a comparison of our data with these theoretical expectations and present upper limits at the 95% CL on the cross section times the branching ratio to hadrons and a photon for the rare or new processes: (1) [sigma](e[superscript]+e ...