Now showing items 161-170 of 194
Analytical solution of an irreversible surface reaction model
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1991-12)
In this work, we consider a simple model of reaction-limited annihilation A + B → 0 with a random source and desorption in the spirit of the reaction model proposed by Fitchthorn, Ziff, and Gulari, and we solve it exactly ...
The diffusion-limited reaction A+B→0 on a fractal substrate
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1991-12)
We show in this paper how the segregation of reactants in the diffusion-limited reaction A+B→0 on a fractal substrate arises. For spectral dimensions d s ⩽ 2 we obtain segregation controlled by the source and/or the intrinsic ...
Isobaric analog states of neutron-rich nuclei. Doppler shift as a measurement tool for resonance excitation functions
(Società Italiana di Fisica; Società Italiana di Fisica and Springer-Verlag, 2005-09)
We present a new approach for the measurement of resonance excitation functions of neutron-rich nuclei using Doppler shift information. Preliminary data from the first application of the method is presented in the spectroscopy ...
High energy isospin breaking in technicolor theories
(Elsevier, 1989-11-30)
Within technicolor theories, we explore the impact of four-fermion interactions on the fermion mass splittings via explicit breaking of the custodial SU(2)R symmetry. Assuming they do not lead tounacceptably large ...
New NNLL QCD results on the decay B → X s ℓ + ℓ –
(Springer-Verlag; Società Italiana di Fisica, Springer-Verlag, 2004-07)
We present here new NNLL predictions on the inclusive rare decay B → X s ℓ + ℓ – based on our new two-loop QCD analysis of the four-quark operators.
A family of strings with spin
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1996-01)
Using an equivalence theorem, we discuss some stationary interiors for a string with spin density in a space with torsion. We show that there is a family of solutions characterized by the spin divergences and compare the ...
Signal mixing in a ratchet device: commensurability and current control
(Springer-Verlag; EDP Sciences, Società Italiana di Fisica, and Springer-Verlag, 2004-08)
Rectification current in overdamped ratchets can be easily controlled by applying two driving signals and tuning either their relative phase or their frequency ratio. The interplay of the two inputs generates intriguing ...
Space-charge layers in semi-insulating GaAs: Photoexcited two-dimensional electron systems
(Elsevier, 1985)
Resonant Raman spectra of photoexcited semi-insulating GaAs and Fe/GaAs show features characteristic of two-dimensional electron plasmas. The results are ascribed to the presence of a space-charge layer at the surface, ...
Eikonal wave functions and model independent exclusive B decays
(Elsevier, 1994-10-06)
In this letter we calculate the proper normalization for the B meson eikonal valence wave function used in exclusive B decays. The normalization appropriate for a hard scattering process renormalized at the scale [mu] is ...
Physics potential of ATLAS detector with high luminosity
(Springer-Verlag; Società Italiana di Fisica, Springer-Verlag, 2004-07)
The ATLAS detector is designed to exploit the full physics potential in the TeV energy region opened up by the Large Hadron Collider at a center of mass energy of 14 TeV with very high luminosities. The physics performance ...