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49 papers · 1 filter
Global structure of exact cosmological solutions in the brane world
Shinji Mukohyama, Tetsuya Shiromizu, Kei-ichi Maeda
We find the explicit coordinate transformation which links two exact cosmological solutions of the brane world which have been recently discovered. This means that both solutions a…
Spinodal effect in the natural inflation model
S. Tsujikawa, T. Torii
Recently, Cormier and Holman pointed out that fluctuations of an inflaton field are significantly enhanced in the model of {\it spinodal inflation} with a potential for…
Search for the Charged Higgs Boson in the Decays of Top Quark Pairs in the and Channels at =1.8 TeV
T. Affolder
Top quark production offers the unique opportunity to search for a charged Higgs boson (), as the contribution from can be large in extensions of the St…
The Values Distribution in a Competing Shares Financial Market Model
A. Ponzi, Y. Aizawa
We present our competing shares financial market model and describe its behaviour by numerical simulation. We show that in the critical region the distribution avalanches of the ma…
Violation of the cosmic no hair conjecture in Einstein-Maxwell-dilaton system
Kengo Maeda, Takashi Torii, Makoto Narita
The cosmic no hair conjecture is tested in the spherically symmetric Einstein-Maxwell-dilaton~(EMD) system with a positive cosmological constant . Firstly, we analytically show…
Criticality and Punctuated Equilibrium in a Spin System Model of a Financial Market
A. Ponzi, Y. Aizawa
We describe a financial market model which shows a non-equilibrium phase transition. Near the transition punctuated equilibrium behaviour is seen, with avalanches occuring on all s…