96,393 research outputs found
On quark mass correction to the string potential
Following recent work by Lambiase and Nesterenko we study in detail the
interquark potential for a Nambu-Goto string with point masses attached to its
ends. We obtain exact solutions to the gap equations for the Lagrange
multipliers and metric components and determine the potential without
simplifying assumptions. We also discuss L\"{u}scher term and argue that it
remains universal.Comment: 15 pages LaTeX. 8 figures. Uses revtex.st
Density of States and Magnetic Correlations at a Metal-Mott Insulator Interface
The possibility of novel behavior at interfaces between strongly and weakly
correlated materials has come under increased study recently. In this paper, we
use determinant Quantum Monte Carlo to determine the inter-penetration of
metallic and Mott insulator physics across an interface in the two dimensional
Hubbard Hamiltonian. We quantify the behavior of the density of states at the
Fermi level and the short and long range antiferromagnetism as functions of the
distance from the interface and with different interaction strength,
temperature and hopping across the interface. Induced metallic behavior into
the insulator is evident over several lattice spacings, whereas
antiferromagnetic correlations remain small on the metallic side. At large
interface hopping, singlets form between the two boundary layers, shielding the
two systems from each other.Comment: 7 pages, 6 figure
Single chargino production via gluon-gluon fusion in a supersymmetric theory with an explicit R-parity violation
We studied the production of single chargino
accompanied by lepton via gluon-gluon fusion at the LHC. The
numerical analysis of their production rates is carried out in the mSUGRA
scenario with some typical parameter sets. The results show that the cross
sections of the productions via gluon-gluon
collision are in the order of femto barn quantitatively at the
CERN LHC, and can be competitive with production mechanism via quark-antiquark
annihilation process.Comment: LaTex file, 18 pages, 4 EPS file
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