Zobrazeno 1 - 10
of 48
pro vyhledávání: '"Jittoh, Toshifumi"'
Autor:
Jittoh, Toshifumi, Kohri, Kazunori, Koike, Masafumi, Sato, Joe, Sugai, Kenichi, Yamanaka, Masato, Yazaki, Koichi
We propose helium-4 spallation processes induced by long-lived stau in supersymmetric standard models, and investigate an impact of the processes on light elements abundances. We show that, as long as the phase space of helium-4 spallation processes
Externí odkaz:
http://arxiv.org/abs/1209.1951
Autor:
Jittoh, Toshifumi, Kohri, Kazunori, Koike, Masafumi, Sato, Joe, Sugai, Kenichi, Yamanaka, Masato, Yazaki, Koichi
Publikováno v:
Phys.Rev.D84:035008,2011
We propose helium-4 spallation processes induced by long-lived stau in supersymmetric standard models, and investigate an impact of the processes on light elements abundances. We show that, as long as the phase space of helium-4 spallation processes
Externí odkaz:
http://arxiv.org/abs/1105.1431
Autor:
Jittoh, Toshifumi, Kohri, Kazunori, Koike, Masafumi, Sato, Joe, Shimomura, Takashi, Yamanaka, Masato
Publikováno v:
Phys.Rev.D82:115030,2010
We calculate the relic density of stau at the beginning of the Big-Bang Nucleosynthesis (BBN) era in the coannihilation scenario of minimal supersymmetric standard model (MSSM). In this scenario, stau can be long-lived and form bound states with nucl
Externí odkaz:
http://arxiv.org/abs/1001.1217
Publikováno v:
Phys.Lett.B675:450-454,2009
We investigate gauge-Higgs unification models in eight-dimensional spacetime where extra-dimensional space has the structure of a four-dimensional compact coset space. The combinations of the coset space and the gauge group in the eight-dimensional s
Externí odkaz:
http://arxiv.org/abs/0903.2164
Publikováno v:
Phys.Rev.D79:056004,2009
We investigate ten-dimensional gauge theories whose extra six-dimensional space is a compact coset space, $S/R$, and gauge group is a direct product of two Lie groups. We list up candidates of the gauge group and embeddings of $R$ into them. After di
Externí odkaz:
http://arxiv.org/abs/0812.0910
Autor:
Jittoh, Toshifumi, Kohri, Kazunori, Koike, Masafumi, Sato, Joe, Shimomura, Takashi, Yamanaka, Masato
Publikováno v:
Phys.Rev.D78:055007,2008
A scenario of the Big-Bang Nucleosynthesis is analyzed within the Minimal Supersymmetric Standard Model which is consistent with a stau-neutralino coannihilation scenario to explain the relic abundance of dark matter. We find that we can account for
Externí odkaz:
http://arxiv.org/abs/0805.3389
Publikováno v:
Prog.Theor.Phys.120:1041-1063,2008
We investigate the gauge-Higgs unification models within the scheme of the coset space dimensional reduction, beginning with a gauge theory in a fourteen-dimensional spacetime where extra-dimensional space has the structure of a ten-dimensional compa
Externí odkaz:
http://arxiv.org/abs/0803.0641
Autor:
Jittoh, Toshifumi, Kohri, Kazunori, Koike, Masafumi, Sato, Joe, Shimomura, Takashi, Yamanaka, Masato
Publikováno v:
Phys.Rev.D76:125023,2007
Modification of standard big-bang nucleosynthesis is considered in the minimal supersymmetric standard model to resolve the excessive theoretical prediction of the abundance of primordial lithium 7. We focus on the stau as a next-lightest superpartic
Externí odkaz:
http://arxiv.org/abs/0704.2914
Publikováno v:
Phys.Rev.D73:055009,2006
We study the stau lifetime in a scenario with the LSP taken to be a neutralino and the NLSP being a stau, based on the minimal supersymmetric Standard Model. The mass difference between the LSP and NLSP, $\delta m$, must satisfy $\delta m/m_{\tilde{\
Externí odkaz:
http://arxiv.org/abs/hep-ph/0512197
Publikováno v:
Phys.Rev. A71 (2005) 012109
We study the decay process of an unstable quantum system, especially the deviation from the exponential decay law. We show that the exponential period no longer exists in the case of the s-wave decay with small $Q$ value, where the $Q$ value is the d
Externí odkaz:
http://arxiv.org/abs/quant-ph/0408149