Physics

  2010 AUG 17 - (VerticalNews.com) -- According to recent research from Niigata, Japan, "We review pedagogically non-Abelian discrete groups, which play an important role in particle physics. We show group-theoretical aspects for many concrete groups, such as representations and their tensor products."

  "We explain how to derive, conjugacy classes, characters, representations, and tensor products for these groups (with a finite number). We discuss them explicitly for S-N, A(N), T', D-N, Q(N), E(2N(2)), Delta(3N(2)), T-7, Sigma(3N(3)), and Delta(6N(2)), which have been applied for model building in particle physics. We also present typical flavor models by using A(4), S-4, and Delta(54) groups. Breaking patterns of discrete groups and decompositions of multiplets are important for applications of the non-Abelian discrete symmetry. We discuss these breaking patterns of the non-Abelian discrete group, which are a powerful tool for model buildings," wrote H. Ishimori and colleagues, Niigata University ...read more

  2010 AUG 3 - (VerticalNews.com) -- According to recent research published in the journal Communications in Theoretical Physics, "The Double Folding (DF) model calculation of the internuclear potential in heavy-ion interactions when the participant nuclei are deformed in their ground states involves a six-dimensional integral."

  "Using the multipole expansion in these calculations, the DF six-dimensional integral reduce to the sum of the products of three single-dimensional integrals. In this paper we have presented a procedure for the calculation of the radius dependent functions in the multipole expansion of the nuclear density and their Fourier transforms," wrote O.N. Ghodsi and colleagues ...read more

  2010 AUG 3 - (VerticalNews.com) -- According to a study from Beijing, People's Republic of China, "In this paper a new dynamic system with integer and fractional order is investigated."

  "It is shown that determining the effect of quadratic coefficients to the systematic structure can be converted to determining that of coefficients of the linear part. Under some parametric conditions, the system can produce chaotic attractors similar as Lorenzat tractor," wrote X.D. Zhang and colleagues ...read more