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37 papers · 1 filter
Milagrito: a TeV air-shower array
The Milagro Collaboration, R. Atkins
Milagrito, a large, covered water-Cherenkov detector, was the world's first air-shower-particle detector sensitive to cosmic gamma rays below 1 TeV. It served as a prototype for th…
Scaling tests of the improved Kogut-Susskind quark action
The MILC collaboration, C. Bernard, T. Burch +8
Improved lattice actions for Kogut-Susskind quarks have been shown to improve rotational symmetry and flavor symmetry. In this work we find improved scaling behavior of the rho and…
Spin correlations in nonlinear optical response: Light-induced Kondo effect
T. V. Shahbazyan, I. E. Perakis, M. E. Raikh
We study the role of spin correlations in nonlinear absorption due to optical transitions from a deep impurity level to states above a Fermi sea. We demonstrate that the Hubbard re…
The geodesic flow of a nonpositively curved graph manifold
Christopher B. Croke, Bruce Kleiner
We study discrete, cocompact, isometric actions of groups on Hadamard spaces, and the induced actions on ideal boundaries. For a class of groups generalizing fundamental groups of…
Bosonization Based on Bethe Ansatz Equations and Spin-Charge Separation in the Hubbard Model with Finite U
Yue Yu, Huan-Xiong Yang, Yong-Shi Wu
We develop a bosonization approach for one-dimensional models based on Bethe ansatz equations. The operator formalism of the exact soluble models in the low energy limit provides a…
A Multi-Component Measurement of the Cosmic Ray Composition Between 10^{17} eV and 10^{18} eV
T. Abu-Zayyad, K. Belov, D. J. Bird +45
The average mass composition of cosmic rays with primary energies between eV and eV has been studied using a hybrid detector consisting of the High Resolution Fly…