Zobrazeno 1 - 10
of 531
pro vyhledávání: '"Kasuya, S."'
Autor:
Kasuya, S., Kawasaki, M.
Publikováno v:
Phys.Rev. D70 (2004) 103519
We study the reionization scenario in which ionizing UV photons emitted from decaying particle, in addition to usual contributions from stars and quasars, ionize the universe. It is found that the scenario is consistent with both the first year data
Externí odkaz:
http://arxiv.org/abs/astro-ph/0409419
Publikováno v:
Phys.Rev.D69:023512,2004
We show that UV photons produced by decaying particles can partially reionize the universe and explain the large optical depth observed by Wilkinson Microwave Anisotropy Probe. Together with UV fluxes from early formed stars and quasars, it is possib
Externí odkaz:
http://arxiv.org/abs/astro-ph/0309434
Publikováno v:
Phys.Lett. B578 (2004) 259-268
We study the curvaton scenario using the MSSM flat directions in the gauge-mediated SUSY breaking model. We find that the fluctuations in the both radial and phase directions can be responsible for the density perturbations in the universe through th
Externí odkaz:
http://arxiv.org/abs/hep-ph/0305134
Publikováno v:
Phys.Rev. D68 (2003) 023501
We investigate whether the Affleck-Dine (AD) mechanism works when the contribution of the two-loop thermal correction to the potential is negative in the gauge-mediated supersymmetry breaking models. The AD field is trapped far away from the origin b
Externí odkaz:
http://arxiv.org/abs/hep-ph/0302154
Publikováno v:
Phys.Lett. B559 (2003) 99-106
We find that there exists a soliton-like solution ``I-ball'' in theories of a real scalar field if the scalar potential satisfies appropriate conditions. Although the I-ball does not have any topological or global U(1) charges, its stability is ensur
Externí odkaz:
http://arxiv.org/abs/hep-ph/0209358
Autor:
Kasuya, S.
We consider the Affleck-Dine baryogenesis comprehensively in the minimal supersymmetric standard model with gauge-mediated supersymmetry breaking. Considering the high temperature effects, we see that the Affleck-Dine field is naturally deformed into
Externí odkaz:
http://arxiv.org/abs/hep-ph/0201185
Publikováno v:
Phys.Rev. D65 (2002) 063509
We investigate whether the Affleck-Dine mechanism can produce sufficient baryon number of the universe in the gauge-mediated SUSY breaking models, while evading the cosmological moduli problem by late-time entropy production. We find that the Q-ball
Externí odkaz:
http://arxiv.org/abs/hep-ph/0108171
Autor:
Kasuya, S., Kawasaki, M.
Publikováno v:
Phys.Rev. D64 (2001) 123515
We consider the Affleck-Dine baryogenesis comprehensively in the minimal supersymmetric standard model with gauge-mediated supersymmetry breaking. Considering the high temperature effects, we see that the Affleck-Dine field is naturally deformed into
Externí odkaz:
http://arxiv.org/abs/hep-ph/0106119
Autor:
Kasuya, S.
Publikováno v:
Phys.Lett. B515 (2001) 121-124
We comment on the possibility of a spinning complex scalar field to be dark energy. We show that it deforms (almost) completely into a nontopological soliton state, a Q ball, and the equation of state becomes that of the matter or radiation, dependin
Externí odkaz:
http://arxiv.org/abs/astro-ph/0105408
Autor:
Kasuya, S., Kawasaki, M.
Publikováno v:
Phys.Rev.Lett. 85 (2000) 2677-2680
We obtain a new type of a stable Q ball in the context of gauge-mediated supersymmetry breaking in minimal supersymmetric standard model. It is so-called gravity-mediation type of Q ball, but stable against the decay into nucleons, since the energy p
Externí odkaz:
http://arxiv.org/abs/hep-ph/0006128