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23 papers · 1 filter
The Strong Coupling from Quarkonia
Aida X. El-Khadra
The status of determinations of $\al_s$ from quarkonia using lattice QCD is reviewed. We compare the results with those obtained from perturbative QCD.
Comment on: "Nucleon-nucleon scattering lengths in QCD sum rules,"
R. J. Furnstahl, T. Hatsuda
In a recent Physical Review Letter, Kondo and Morimatsu present a QCD sum rule calculation of nucleon-nucleon scattering lengths. They also relate the empirical scattering lengths…
Vortex Motion and Vortex Friction Coefficient in Triangular Josephson Junction Arrays
Wenbin, David G. Stroud
The dynamical response of triangular JJA is investigated using the RCSJ model. A flux flow regime is found to extend between a lower vortex-depinning current and a higher critical…
The Semileptonic Decay Fraction of B Mesons in the Light of Interfering Amplitudes
K. Honscheid, R. Waldi, K. Schubert
Consequences of the interference between spectator amplitudes for the lifetimes and semileptonic decay fractions of B^0 and B^+ mesons are discussed. Assuming duality and construct…
Universal subgap optical conductivity in quasi-one-dimensional Peierls systems
Kihong Kim, Ross H. McKenzie, John W. Wilkins
Quasi-one-dimensional Peierls systems with quantum and thermal lattice fluctuations can be modeled by a Dirac-type equation with a Gaussian-correlated off-diagonal disorder. A powe…
Spectral asymmetries in nucleon sum rules at finite density
R. J. Furnstahl
Apparent inconsistencies between different formulations of nucleon sum rules at finite density are resolved through a proper accounting of asymmetries in the spectral functions bet…