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12 papers · 1 filter
Big Bang Nucleosynthesis and Lepton Number Asymmetry in the Universe
K. Kohri, M. Kawasaki, Katsuhiko Sato
Recently it is reported that there is the discrepancy between big bang nucleosynthesis theory and observations (BBN crisis). We show that BBN predictions agree with the primordial…
An Analysis of ππ-Scattering Phase Shift and Existence of σ(555) particle
S. Ishida, M. Y. Ishida, H. Takahashi +3
In most of the Nambu:Jona-Lasinio(NJL)-type models, realizing the hidden chiral symmetry, the existence of a scalar particle σis needed with a mass m_σ=2 m_q, as a partner of the N…
Geometric Quantization on a Coset Space G/H
Masaomi Kimura
Geometric quantization on a coset space is considered, intending to recover Mackey's inequivalent quantizations. It is found that the inequivalent quantizations can be obtain…
Dynamical Symmetry Breaking in Flat Space with Non-trivial Topology
Ken-ichi Ishikawa, Tomohiro Inagaki, Kenji Fukazawa +1
We consider a four-fermion theory as a simple model of dynamical symmetry breaking in flat space with non-trivial topology, motivated from recent studies in similar considerations…
Extremely High Energy Neutrinos and their Detection
Shigeru Yoshida, Hongyue Dai, Charles C. H. Jui +1
We discuss in some detail the production of extremely high energy (EHE) neutrinos with energies above 10^18 eV. The most certain process for producing such neutrinos results from p…
Comparison of Atmospheric Neutrino Flux Calculations at Low Energies
T. K. Gaisser, M. Honda, K. Kasahara +4
We compare several different calculations of the atmospheric neutrino flux in the energy range relevant for contained neutrino interactions, and we identify the major sources of di…