2,329 research outputs found
Weak solution method of the non-perturbative renormalization group equation to describe dynamical chiral symmetry breaking and its application to beyond the ladder analysis in QCD
The method of non-perturbative renormalization group (NPRG) is applied to the
analysis of dynamical chiral symmetry breaking (DCSB) in QCD. We show that the
DCSB solution of the NPRG flow equation can be obtained without the
bosonization. The solution, having the singular point, can be authorized as the
weak solution of partial differential equation, and can be easily evaluated
using the method of the characteristic curve. Also we show that our non-ladder
extended approximation improves almost perfectly the gauge dependence of the
chiral condensates.Comment: 6 pages, 3 figures, contribution to SCGT12 "KMI-GCOE Workshop on
Strong Coupling Gauge Theories in the LHC Perspective", 4-7 Dec. 2012, Nagoya
Universit
Stellar Parameters and Elemental Abundances of Late-G Giants
The properties of 322 intermediate-mass late-G giants (comprising 10
planet-host stars) selected as the targets of Okayama Planet Search Program,
many of which are red-clump giants, were comprehensively investigated by
establishing their various stellar parameters (atmospheric parameters including
turbulent velocity fields, metallicity, luminosity, mass, age, projected
rotational velocity, etc.), and their photospheric chemical abundances for 17
elements, in order to study their mutual dependence, connection with the
existence of planets, and possible evolution-related characteristics. The
metallicity distribution of planet-host giants was found to be almost the same
as that of non-planet-host giants, making marked contrast to the case of
planet-host dwarfs tending to be metal-rich. Generally, the metallicities of
these comparatively young (typical age of ~10^9 yr) giants tend to be somewhat
lower than those of dwarfs at the same age, and super-metal-rich ([Fe/H] > 0.2)
giants appear to be lacking. Apparent correlations were found between the
abundances of C, O, and Na, suggesting that the surface compositions of these
elements have undergone appreciable changes due to dredge-up of H-burning
products by evolution-induced deep envelope mixing which becomes more efficient
for higher-mass stars.Comment: Accepted for publication in PASJ (21 pages, 15 figures) (wrong URL of
e-tables in Ver.1 has been corrected in Ver.2
Analysis of Spontaneous Mass Generation by Iterative Method in the Nambu-Jona-Lasinio Model and Gauge Theories
We propose a new iterative method to directly calculate the spontaneous mass
generation due to the dynamical chiral symmetry breaking. We can conclude the
physical mass definitely without recourse to any other consideration like the
free energy comparison.Comment: 6 pages, 7 figures, contribution to SCGT12 "KMI-GCOE Workshop on
Strong Coupling Gauge Theories in the LHC Perspective", 4-7 Dec. 2012, Nagoya
Universit
ヒト迷走神経下神経節における TRPVs, P2X3 及びparvalbuminの分布について
Tohoku University笹野高嗣課
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