Leptogenesis in a model with Friedberg-Lee symmetry (2009)
We study the matter-antimatter asymmetry through the leptogenesis mechanism in a specific model with the Friedberg-Lee (FL) symmetry.We relate the leptogenesis with the CP violating Dirac and...
Constrains on Timeon Model (2009)
The timeon model recently proposed by Friedberg and Lee has a potential problem of flavor changing neutral currents (FCNCs) if the mass of the timeon is small. In order to avoid the problem without...
Tri-Bimaximal Mixing from Twisted Friedberg-Lee Symmetry (2008)
Araki, Takeshi, Takahashi, Ryo
We consider the tri-bimaximal generation mixing in terms of the Friedberg-Lee (FL) symmetry. The symmetry is a kind of translational one for the fermion field operators. The symmetry with uniform...
Testing Flavor Symmetries by B-Factory (2008)
Predictions of the Cabibbo-Kobayashi-Maskawa (CKM) parameters are investigated in detail in recent predictive models which are based on low-energy non-abelian discrete family symmetries. Some of the...
(Non-)Abelian discrete anomalies (2008)
Araki, Takeshi, Kobayashi, Tatsuo, Kubo, Jisuke, Ramos-Sanchez, Saul, Ratz, Michael, Vaudrevange, Patrick K. S.
We derive anomaly constraints for Abelian and non-Abelian discrete symmetries using the path integral approach. We survey anomalies of discrete symmetries in heterotic orbifolds and find a new...
Implementation of PC Cluster System with Memory Mapped File by Commodity OS (2008)
Jun Kanai, Takuro Mori, Takeshi Araki, Hironori Nakajo, Mitaro Namiki, Noboru Tanabe
Abstract In this study, we propose a method to implement PC cluster systems on a non-open source of the commodity OS. For this purpose, we also introduce an implementation of a Distributed Shared...
Implementation of PC Cluster System with Memory Mapped File by Commodity OS (2008)
Jun Kanai, Takuro Mori, Takeshi Araki, Noboru Tanabe, Hironori Nakajo, Mitaro Namiki
Abstract In this paper, we propose a programming model to implement PC cluster systems on a non-open source of the commodity OS. For this purpose, we also introduce an implementation of a Distributed...
Discrete R-symmetry anomalies in heterotic orbifold models (2007)
Araki, Takeshi, Choi, Kang-Sin, Kobayashi, Tatsuo, Kubo, Jisuke, Ohki, Hiroshi
Anomalies of discrete R-symmetries appearing in heterotic orbifold models are studied. We find that the mixed anomalies for different gauge groups satisfy the universal Green-Schwarz (GS) condition,...
Anomalies of Discrete Symmetries and Gauge Coupling Unification (2006)
The anomaly of a discrete symmetry is defined as the Jacobian of the path-integral measure. Assuming that the anomaly at low energies is cancelled by the Green-Schwarz (GS) mechanism at a fundamental...
Anomaly of discrete family symmetries and gauge coupling unification (2006)
Anomaly of discrete symmetries can be defined as the Jacobian of the path-integral measure. We assume that an anomalous discrete symmetry at low energy is remnant of an anomaly free discrete...
S_3 Flavor Symmetry and Leptogenesis (2005)
Araki, Takeshi, Kubo, Jisuke, Paschos, Emmanuel A.
We consider leptogenesis in a minimal S_3 extension of the standard model with an additional Z_2 symmetry in the leptonic sector. It is found that the CP phase appearing in the neutrino mixing is the...