We calculate the total and differential decay rates for the semi-inclusive nonleptonic decays B → D s Xq (q = c or u) under the factorization hypothesis. The initial bound state effect is treated using the light-cone expansion and the heavy quark effective theory. We investigate the contribution of the penguin amplitude for the decay mode B → D s Xc and find that it is small but non-negligible....

We numerically investigate reheating after quadratic inflation with up to 65 fields, focusing on the production of non-Gaussianity. consider several sets initial conditions, masses and decay rates. As expected we find that phase can have a significant effect non-Gaussian signal, but for this number fields detectable level non-Gaussianity requires mass range rates be ordered in particular way. s...

We report new laboratory studies of the radiation-induced destruction of glycine-containing ices for a range of temperatures and compositions that allow extrapolation to martian conditions. In situ infrared spectroscopy was used to study glycine decay rates as a function of temperature (from 15 to 280 K) and initial glycine concentrations in six mixtures whose compositions ranged from dry glyci...

Energy development of decaying isotropic turbulence in a 3-D periodic cube with non-rotating or rotating frames of reference is studied through direct numerical simulation using GPU accelerated lattice Boltzmann method. The initial turbulence is isotropic, generated in spectral space with prescribed energy spectrum E(κ)~κm in a range between κmin and ...

[1] The reason for the survival of mountainous topography in ancient orogenic belts is a long-standing problem in geomorphology and geodynamics. We explore the geomorphologic controls on the timescale for the postorogenic decay of topography to address the question of whether there is a viable geomorphologic explanation for the persistence of topography in ancient orogenic belts or whether alte...

This paper is devoted to the study of the rapid exponential stabilization problem for a controlled Korteweg-de Vries equation on a bounded interval with homogeneous Dirichlet boundary conditions and Neumann boundary control at the right endpoint of the interval. For every noncritical length, we build a feedback control law to force the solution of the closed-loop system to decay exponentially t...

Metabolism of a low-solubility substrate is limited by dissolution and availability and can hardly be determined. We developed a numerical model for simultaneously calculating dissolution kinetics of such substrates and their metabolism and microbial growth (Monod kinetics with decay) and tested it with three aerobic phenanthrene (PHE) degraders: Novosphingobium pentaromativorans US6-1, Sphingo...

In this paper we investigate the time decay rates of perturbations of the traveling waves for viscous conservation laws with dispersion. The convergence rates in time to traveling waves are obtained when the initial data have different asymptotic limits at the far fields 7N: This improves previous results on decay rates. r 2002 Elsevier Science (USA). All rights reserved.