μ\mu Parameter from Dynamical Rearrangement of U(1) and θ\theta Parameter

We study the generation of $\mu$ parameter from the dynamical rearrangement of local U(1) symmetry in a five-dimensional model and discuss phenomenological implications on the $\theta$ parameter, under the assumption that supersymmetry is broken by the Scherk-Schwarz mechanism.Comment: 16 page

Family number, Wilson line phases and hidden supersymmetry

We study the relationship between the family number of chiral fermions and the Wilson line phases, based on the orbifold family unification. We find that flavor numbers are independent of the Wilson line phases relating extra-dimensional components of gauge bosons, as far as the standard model gauge symmetry is respected. This feature originates from a hidden quantum-mechanical supersymmetry.Comment: 17 pages, 1 figur

Quarkyonic matter in lattice QCD at strong coupling

We study the phase diagram of quark matter at finite temperature and density in the strong coupling lattice QCD with one species of unrooted staggered fermions including finite coupling ($1/g^2$) effects for color SU($N_c$). We find that we may have partially chiral restored medium density matter at $N_c=3$, which would correspond to the quarkyonic matter suggested at large $N_c$.Comment: 9 pages, 4 figure

孝行山 : 菅野八郎と三つの教え

This article examines the writings of Kanno Hachirō (1813–1888), a midscale farmer from Fukushima, and argues that the binary between “religion” (shūkyō) and “morality” (dōtoku) is of limited usefulness in comprehending his worldview. Hachirō wrote extensively on the virtue of filial piety (kō) and claimed that it represented the highest ideal of Confucianism, Shinto, and Buddhism. He expressed this through a diagram of what he called the Filial Piety Mountain (kōkōzan), in which he depicted Confucianism, Shinto, and Buddhism as three paths leading toward the summit. Utilizing recent scholarship that has illuminated the modern origin of the category of “religion,” this article highlights the absence of the dichotomy between “religion” and “morality” in Hachirō’s writings and his conception of the Filial Piety Mountain. Just as an uncritical imposition of the category of “religion” on premodern sources can result in distortions, approaching Hachirō’s writings through the modern lens of “morality” or “conventional morality” (tsūzoku dōtoku) that is apart from “religion” can lead to an overly compartmentalized view of his thought. The article suggests an alternative approach through Ann Swidler’s model of “cultural repertoire.

Chiral and deconfinement transitions in strong coupling lattice QCD with finite coupling and Polyakov loop effects

We investigate chiral and deconfinement transitions in the framework of the strong coupling lattice QCD for color SU(3) with one species of unrooted staggered fermion at finite temperature and quark chemical potential. We take account of the leading order Polyakov loop terms as well as the next-to-next-to-leading order (1/g^4) fermionic terms of the strong coupling expansion in the effective action. We investigate the Polyakov loop effects by comparing two approximation schemes, a Haar measure method (no fluctuation from the mean field) and a Weiss mean-field method (with fluctuations). The effective potential is obtained in both cases, and we analytically clarify the Polyakov loop contributions to the effective potential. The Polyakov loop is found to suppress the chiral condensate and to reduce the chiral transition temperature at mu=0, and the chiral transition temperature roughly reproduces the Monte Carlo results at beta=2N_c/g^2 \lesssim 4. The deconfinement transition is found to be the crossover and first order for light (am_0 \lesssim 4 at beta=4) and heavy quark masses, respectively.Comment: 13 pages, 15 figures. v2; More dicussions added, figures improved, and typos correcte