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34 papers · 1 filter
Schwinger-Dyson approach to light pseudoscalars
Dubravko Klabucar, Dalibor Kekez
We review briefly some of the successes of Schwinger-Dyson (SD) approach to the physics of quarks and hadrons, primarily light pseudoscalar mesons including eta and eta'. The main…
Phenomenological Schwinger-Dyson approach to eta-eta' mass matrix
Dalibor Kekez, Dubravko Klabucar
It is reviewed pedagogically how a very successful description of the eta-eta' mass matrix can be achieved in the consistently coupled Schwinger-Dyson and Bethe-Salpeter approach i…
Changes in the Hurst exponent of heartbeat intervals during physical activities
M. Martinis, A. Knežević, G. Krstačić +1
The fractal scaling properties of the heartbeat time series are studied in a controlled ergometric regime using the Hurst rescaled range R/S analysis. The long-time "memory effect"…
The photon-neutrino interaction in non-commutative gauge field theory and astrophysical bounds
Peter Schupp, Josip Trampetic, Julius Wess +1
In this letter we propose a possible mechanism of left- and right-handed neutrino couplings to photons, which arises quite naturally in non-commutative gauge field theory. We estim…
Is there chaos in the electron microscope?
D. Kunstelj, M. Martinis, A. Knežević
High-temperature superconductor has been investigated by the high-resolution electron microscope (HREM) and the photodensitometric technique in order…
Time Operator for a Quantum Singular Oscillator
M. Martinis, V. Mikuta
The problem of existence of a self-adjoint time operator conjugate to a Hamiltonian with SU(1,1) dynamical symmetry is investigated. In the space spanned by the eigenstates of the…