We calculate the mass dependent renormalization factors of heavy-light bilinears at one-loop order of perturbation theory, when the heavy quark is treated with the Fermilab formalism. We present numerical results for the Wilson and Sheikholeslami-Wohlert actions, with and without tree-level rotation. We find that in both cases our results smoothly interpolate from the static limit to the massle...

The vacuum stability lower bound on the mass of the Higgs boson is numerically investigated in an SU(2)L ⊗ SU(2)R symmetric Yukawa model, which describes two heavy degenerate fermion doublets in the limit of vanishing gauge couplings. Good agreement with perturbation theory is found, although the couplings are strong. The upper bound on the fermion mass and renormalized Yukawa coupling is also ...

In the present paper the two and three point functions, which occur at the study of the various physical processes are considered. The investigation is done in the framework of the perturbation theory at the one loop level. The general analytical and asymptotic expressions for these functions are obtained.

is a genuine feature of this laser configuration, that also appears in other calculations. As can be concluded from Fig. 3, the use of a.efI in eqn. 1 is essential for a reasonable linewidth calculation of DFB lasers with a reflecting end facet. It can be shown that a comparably strong effect also occurs for two reflecting end facets with KL>2 and in the case of the phase-shifted DFB laser with...

This paper is concerned with how the QR factors change when a real matrix A suffers from a left or right multiplicative perturbation, where A is assumed to have full column rank. It is proved that for a left multiplicative perturbation the relative changes in the QR factors in norm are no bigger than a small constant multiple of the norm of the difference between the perturbation and the identi...

We use Stochastic Fluid Models (SFM) for control and optimization (rather than performance analysis) of communication networks, focusing on problems of admission control. We consider a SFM with an uncontrolled traffic class and a controlled traffic class subject to threshold-based admission control. We derive gradient estimators for packet loss and workload related performance metrics with resp...

Software performance instrumentation perturbs the state of the measured system. The primary source of this perturbation is the execution of additional instructions. However, ancillary perturbations include disabled compiler optimizations and memory conflicts. Collectively, these perturbations can increase the measured system’s execution time, change memory reference patterns, reorder events, an...

We examine a family of GI/GI/1 queueing processes generated by a parametric family of service time distributions, F (x, θ), and we show that under suitable conditions the corresponding customer stationary expectation of the system time is twice continuously differentiable with respect to θ. Expressions for the derivatives are given which are suitable for single run derivative estimation. These ...

Results of evaluating the leading order α s corrections to the correlator of tensor currents in pure gluodynamics are presented. These corrections to the parton result for the correlator are not large numerically that allows one to use perturbation theory for the analysis of the resonance spectrum within the sum rules method.

The leading and next-to-leading threshold logarithms of the QCD corrections to electroproduction of heavy quarks in single-particle inclusive kinematics are resummed to all orders in perturbation theory. The resummed cross-section is used to derive the NLO and NNLO results near threshold and their numerical impact on the charm structure function is studied. Talk at the ‘6th International Worksh...