Physical sciences topic list of research papers
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The dipole form of the quark part of the BFKL kernel
Abstract The dipole form of the “Abelian” part of the massless quark contribution to the BFKL kernel is found in the coordinate representation by direct transfer from the momentum representation where the contribution was calculated before. It...
2007 / V.S. Fadin, R. Fiore, A. Papa -
(De)coupling limit of DGP
Abstract We investigate the decoupling limit in the DGP model of gravity by studying its non-linear equations of motion. We show that, unlike 4D massive gravity, the limiting theory does not reduce to a sigma model of a single scalar field:...
2006 / Gregory Gabadadze, Alberto Iglesias -
On the effective action of a space-like brane
Abstract Starting from the non-BPS D(p+1)-brane action, we derive an effective action in (p+1) space dimensions by studying the fluctuations of various bosonic fields around the time-like tachyonic kink solution (obtained by Wick rotation of the...
2004 / Somdatta Bhattacharya, Sudipta Mukherji, Shibaji Roy -
Scaling of anisotropic flow and momentum-space densities for light particles in intermediate energy heavy ion collisions
Abstract Anisotropic flows ( v 2 and v 4 ...
2006 / T.Z. Yan, Y.G. Ma, X.Z. Cai, J.G. Chen, D.Q. Fang, et al. -
Arbitrary parameters in implicit regularization and democracy within perturbative description of 2-dimensional gravitational anomalies
Abstract We show that the Implicit Regularization Technique is useful to display quantum symmetry breaking in a complete regularization independent fashion. Arbitrary parameters are expressed by finite differences between integrals of the same...
2005 / Leonardo A.M. Souza, Marcos Sampaio, M.C. Nemes -
Return of the quantum cosmic censor
Abstract The influential theorems of Hawking and Penrose demonstrate that spacetime singularities are ubiquitous features of general relativity, Einstein's theory of gravity. The utility of classical general relativity in describing gravitational...
2008 / Shahar Hod -
Mixed QCD and weak corrections to top quark pair production at hadron colliders
Abstract The order α s 2 α mixed QCD and weak corrections to top quark...
2005 / W. Bernreuther, M. Fücker, Z.G. Si -
Non-nucleosynthetic heterogeneity in non-radiogenic stable Hf isotopes: Implications for early solar system chronology
Abstract Nucleosynthetic heterogeneity and secondary neutron capture reactions may have important implications for 176Lu–176Hf chronology and modelling of early planetary evolution. So far, the relevance of these phenomena for the Lu–Hf system has...
2010 / Peter Sprung, Erik E. Scherer, Dewashish Upadhyay, Ingo Leya, Klaus Mezger -
On selfdual spin-connections and asymptotic safety
Abstract We explore Euclidean quantum gravity using the tetrad field together with a selfdual or anti-selfdual spin-connection as the basic field variables. Setting up a functional renormalization group (RG) equation of a new type which is...
2015 / U. Harst, M. Reuter -
A multimodal method for non-uniform open waveguides
Abstract We present an original method for the simulation of ultrasonic waves in a varying cross section elastic waveguide embedded in a homogeneous matrix. The so-called multimodal methods consist in expanding the acoustic field in each transverse...
2010 / A.-S. Bonnet-Ben Dhia, B. Goursaud, C. Hazard, A. Prieto -
Material processing with remote technology revolution or evolution?
Abstract In this paper the developments in remote laser material processing with highly brilliant laser beam sources are reviewed. Its history and the system technologies, i.e. laser beam sources and optical components, are presented. The remote...
2010 / M.F. Zaeh, J. Moesl, J. Musiol, F. Oefele -
Experimental and numerical optimization of beam shapes for short-pulse ultraviolet laser cutting processing
Abstract In this work the effect of elliptical beam shapes on cutting performance of silicon is studied experimentally using a Diode Pumped Solid State Q-switched UV laser operating at the wavelength of 355 nm. Elliptical beams are investigated by...
2010 / Anatoly Sotnikov, Harald Laux, Bernd Stritzker -
A Bandgap Reference Circuit with 2nd Order Curvature Correction
Abstract A second-order compensated bandgap reference (BGR) based on a temperature dependent resistor ratio was proposed, and the temperature characteristic of the BGR was optimized. A simulation based on NEC 2μm BiCMOS process library shows that a...
2012 / Wei Kui, Jianyang Zhou -
Magnetic Fields of Vortices in a Superconducting Thin Film
Abstract The magnetic fields associated with a single superconducting vortex traversing a thin film are calculated. The formulation of Pearl, which has been used for a geometry in which for z<0 one has a vacuum and for z>0 one has...
2012 / W.J. Kossler, Nathan Abraham, C.E. Stronach, Allan J. Greer -
A Bayesian Approach to Magnetic Moment Determination Using μSR
Abstract A significant challenge in zero-field μSR experiments arises from the uncertainty in the muon site. It is possible to calculate the dipole field (and hence precession frequency v) at any particular site given the magnetic moment μ and...
2012 / S.J. Blundell, A.J. Steele, T. Lancaster, J.D. Wright, F.L. Pratt -
A theoretical study of desorption induced by electronic transitions in alkali halides
Abstract We have studied desorption following the excitation of core- or valence-electrons using quantum chemical calculations of the potential energy surfaces. For core excitation, we simulate the state of two holes localised on a halogen ion using ...
2002 / Noriaki Itoh, A.M. Stoneham, A.H. Harker -
Particle Swarm Optimization Technique for Solving Economic Emission Dispatch Problems
Abstract This paper presents a new approach to Economic Emission Dispatch (EED) with the consideration of five thermal generating units using Particle Swarm Particle Swarm Optimization Technique (PSO). To reduce SO2 and NOX emission, there are...
2012 / H. Vennila, T.Ruban Deva Prakash -
Two-Particle Lattice Green Functions on a Two-Dimensional Rectangular Lattice with Next-Nearest Neighbor Hopping2011 / M. Bak
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Quantum Codes Constructed from Self-Dual Codes and Maximal Self-Orthogonal Codes Over F5
Abstract Subcodes of some known maximal self-orthogonal codes and optimal self-dual codes of length n between 9 and 22 over F5 are studied. Using a random search algorithm, we construct subcodes with given dual distance 2, 3, 4, 5 and 6 from these...
2012 / Luobin Guo, Yuena Ma, Youqian Feng -
The Differential Invariants of Space2006 / A. R. Forsyth