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Your search keyword '"Mueller, A.H."' showing total 247 results
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247 results on '"Mueller, A.H."'

29. Radiation by a heavy quark in N = 4 SYM at strong coupling

Author

Hatta, Y., Iancu, E., Mueller, A.H., and Triantafyllopoulos, D.N.

Subjects
High Energy Physics::Theory, High Energy Physics::Phenomenology
Abstract

Using the AdS/CFT correspondence in the supergravity approximation, we compute the energy density radiated by a heavy quark undergoing some arbitrary motion in the vacuum of the strongly coupled N=4 supersymmetric Yang–Mills theory. We find that this energy is fully generated via backreaction from the near-boundary endpoint of the dual string attached to the heavy quark. Because of that, the energy distribution shows the same space–time localization as the classical radiation that would be produced by the heavy quark at weak coupling. We believe that this is an artifact of the supergravity approximation, which will be corrected after including string fluctuations. We discuss some other features of the result, like its anisotropy and the presence of regions with negative energy density. For the case where the quark trajectory is bounded, we also compute the radiated power, by integrating the energy density over the surface of a sphere at infinity. For sufficiently large times, we find agreement with a previous calculation by Mikhailov [hep-th/0305196].

Published
2011

31. Model for interface formation and the resulting electrical properties for barium-strontium-titanate films on silicon

Author

Mueller, A.H., Suvorova, A.N., Irene, E.A., Auciello, O., and Schultz, J.A.

Subjects
Dielectric films -- Research, Thin films -- Research, Silicon -- Research, Silicon -- Electric properties, Nonferrous metals -- Research, Nonferrous metals -- Electric properties, Physics
Abstract

The interface formation between sputtered barium strontium titanate (BST) films and both Si and SiO2 substrate surfaces are followed using real-time spectroscopic ellipsometry and the mass spectrometry of recoiled ions. Electrical characterization of the resulting metal-BST interface capacitors indicates that the samples with SiO2 on the Si surface had the best electrical characteristics.

Published
2003

35. Correlation of QCD dipoles in the impact parameter space

Author

Hatta, Y., Mueller, A.H., and Gingold, Marc

Subjects
[PHYS.HPHE] Physics [physics]/High Energy Physics - Phenomenology [hep-ph], [PHYS.PHYS.PHYS-GEN-PH] Physics [physics]/Physics [physics]/General Physics [physics.gen-ph]
Abstract

In the framework of the QCD dipole model at high energy, we present an analytic evaluation of the dipole pair density in two limits in which the parent dipole is much larger/smaller than the distance between the two child dipoles. Due to conformal symmetry, the two limits give an identical result. The power--law correlation between dipoles explicitly breaks the factorization of target--averaged scattering amplitudes.

Published
2007

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