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23 papers · 1 filter
QED in strong fields
A. Schaefer
We discuss the status of atomic physics in strong field. We focus on the problem of electron-positron lines observed in heavy-ion collisions and on QED effects, calculated in stron…
Dependence of the Bjorken Sum Rule
Lech Mankiewicz, Eckart Stein, Andreas Schäfer
We discuss various estimates of the magnitude of higher-twist corrections to the Bjorken sum rule in polarized deep inelastic scattering.
Time evolution of the two-jet events in the Dynamical String Model
B. Iványi, Zs. Schram, K. Sailer +1
The time dependent pion emission rate and the mean life time of the pion source in the center of mass frame of the two-jet events have been determined for at…
Ioffe-time distribution of quarks in the photon
S. Hofmann, L. Mankiewicz, A. Schäfer
We have analysed the Ioffe-time distribution of quarks in virtual photons using Operator Product Expansion of the correlation function that determines the matrix element of the cor…
The chiral phase transition in a random matrix model with molecular correlations
Tilo Wettig, A. Schäfer, H. A. Weidenmüller
The chiral phase transition of QCD is analyzed in a model combining random matrix elements of the Dirac operator with specially chosen non-random ones. The special form of the latt…
Fractal Conductance Fluctuations in Generic Chaotic Cavities
Roland Ketzmerick
It is shown that conductance fluctuations due to phase coherent ballistic transport through a chaotic cavity generically are fractals. The graph of conductance vs. externally chang…