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27 papers · 1 filter
Dark Energy Parametrizations and the Curvature of the Universe
Kazuhide Ichikawa, Tomo Takahashi
We investigate observational constraints on the curvature of the universe not restricting ourselves to a cosmological constant as dark energy, in particular allowing a dark energy…
SDSS J1029+2623: A Gravitationally Lensed Quasar with an Image Separation of 22.5 Arcseconds
Naohisa Inada, Masamune Oguri, Tomoki Morokuma +16
We report the discovery of a cluster-scale lensed quasar, SDSS J1029+2623, selected from the Sloan Digital Sky Survey. The lens system exhibits two lensed images of a quasar at z_s…
Affleck-Dine baryogenesis in anomaly-mediated SUSY breaking
Masahiro Kawasaki, Kazunori Nakayama
It has been known that in anomaly-mediated SUSY breaking model Affleck-Dine baryogenesis does not work due to trapping of Affleck-Dine field into charge-breaking minima. We show th…
First Nonperturbative Test of a Relativistic Heavy Quark Action in Quenched Lattice QCD
Y. Kayaba, S. Aoki, M. Fukugita +6
We perform a numerical test of a relativistic heavy quark(RHQ) action, recently proposed by Tsukuba group, in quenched lattice QCD at fm. With the use of the improvem…
Underground Water Cherenkov Muon Detector Array with the Tibet Air Shower Array for Gamma-Ray Astronomy in the 100 TeV Region
The Tibet AS Gamma Collaboration, M. Amenomori
We propose to build a large water-Cherenkov-type muon-detector array (Tibet MD array) around the 37,000 m Tibet air shower array (Tibet AS array) already constructed at 4,300…
An estimate of the eta and eta-prime meson masses in Nf=2+1 lattice QCD
CP-PACS, JLQCD Collaborations, : +13
Masses of the eta and eta-prime mesons are estimated in Nf=2+1 lattice QCD with the non-perturbatively O(a) improved Wilson quark action and the Iwasaki RG-improved gluon action, u…