摘要:

AbstractCharm hadron production is reviewed from the view‐point of an experimentalist. Results are presented on total cross‐section measurements for charm‐anticharm pairs, on its dependence on the atomic number as well as results onxFandp⊥2behaviour of charm particles produced in hadronic interactions. Correlation studies and charm hadron spectroscopy are also included in this

ISSN:0015-8208    

DOI:10.1002/prop.2190390502

出版商:WILEY‐VCH Verlag    

年代:1991

数据来源: WILEY

摘要:

AbstractWe review aspects of anomalies in quantum field theory, mainly the canonical quantization of anomalous gauge theories in two spacetime dimensions. This includes the unitary, Lorentz invariant quantization of the chiral Schwinger model; and quantization of nonabelian chiral bosons, described by a generalization of the Siegel action, away from “critical dimension”. Bosonization of chiral theories in background gauge and gravitational fields is extensively discussed via path integral meth

ISSN:0015-8208    

DOI:10.1002/prop.2190390503

出版商:WILEY‐VCH Verlag    

年代:1991

数据来源: WILEY

摘要:

AbstractThe quantum dynamics of a correlated quasi‐twodimensional (q2d) electron system showing the Quantum Hall Effect has been investigated. Galilei transformations are discussed for the correct description of quantum mechanical states in crossed electric and magnetic fields. Our quantum liquid site model with quasibosons carrying electromagnetic flux quanta uses a spatio‐temporary varying configuration of sites {R(t)}. Due to the nontrivial topology of the system and the multiple degeneracy of its ground state non Abelean Berry phases appear in the adiabatic time evolution.The calculation of the effective action functional has been carried out on the basis of a path integral approach. It is shown that the Berry phases entering the Greens function produce a Chern‐Simons‐like topological action term. Our theory yields a quantized conductivity tensor and, thus, exibita Quantum Hall behaviour. In calculating the local density of states of the inhomogeneous quantum liquid one obtains a remarkable broadening of peaks and a reduction of their

ISSN:0015-8208    

DOI:10.1002/prop.2190390504

出版商:WILEY‐VCH Verlag    

年代:1991

数据来源: WILEY

ISSN:0015-8208    

DOI:10.1002/prop.2190390501

出版商:WILEY‐VCH Verlag    

年代:1991

数据来源: WILEY