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81 papers · 1 filter
Nature of Orbital Ordering in La_0.5Sr_1.5MnO_4 is Studied by Soft X-ray Linear Dichroism
D. J. Huang, W. B. Wu, G. Y. Guo +9
We found that the conventional model of orbital ordering of 3x^2-r^2/3y^2-r^2 type in the eg states of La_0.5Sr_1.5MnO_4 is incompatible with measurements of linear dichroism in th…
Threshold pi^0 photo- and electro-production in a meson-exchange model
S. N. Yang, Guan-Yeu Chen, S. S. Kamalov +2
We show that, within a meson-exchange dynamical model describing well most of the existing pion electromagnetic production data up to the second resonance region, one is also able…
Quark distributions in nuclear matter and the EMC effect
H. Mineo, W. Bentz, N. Ishii +2
Quark light cone momentum distributions in nuclear matter and the structure function of a bound nucleon are investigated in the framework of the Nambu-Jona-Lasinio model. This fram…
Effects of New Physics on CP Violation in B Decays
George W. S. Hou
We discuss two models with 1 extra CP phase in transition. The CP phase with fourth generations, previously ignored, coul…
Indications for Large Rescattering in Rare B Decays
George W. S. Hou
The sign of , the evidence for , and the possibly sizable and in all suggest that final state r…
Large N Cosmology
Robert Brandenberger, Pei-Ming Ho, Hsien-chung Kao
We motivate inflationary scenarios with many scalar fields, and give a complete formulation of adiabatic and entropy perturbations. We find that if the potential is very flat, or i…