Zobrazeno 1 - 10
of 479
pro vyhledávání: '"Kouno H"'
Using the Polyakov extended Nambu-Jona-Lasinio (PNJL) model with imaginary chemical potential, the relation between the Roberge-Weiss (RW) phase transition and the extended Z3 symmetry is studied. At low temperature, there is approximate continuous s
Externí odkaz:
http://arxiv.org/abs/0811.4660
The chiral phase transition and color superconductivity in an extended NJL model with eight-quark interactions are studied. The scalar-type nonlinear term hastens the chiral phase transition,the scalar-vector mixing term suppresses effects of the vec
Externí odkaz:
http://arxiv.org/abs/nucl-th/0612038
Publikováno v:
Soryushiron Kenkyu (Kyoto) 112 No.3 (2005), C67-C69
Starting from many quark interactions, we construct a nonlinear sigma-omega model at finite temperature and density. The mesons are introduced as auxiliary fields. Effective quark-meson couplings are strongly related to effective meson masses, since
Externí odkaz:
http://arxiv.org/abs/nucl-th/0509057
Publikováno v:
Eur.Phys.J.A26:159-165,2005
We generalize the linear sigma model in order to develop a chiral-invariant model of nuclear structure. The model is natural, and contains not only the usual sigma meson which is the chiral partner of the pion but also a new chiral-singlet that is re
Externí odkaz:
http://arxiv.org/abs/nucl-th/0503022
Autor:
Miyata, E., Kamazuka, T., Kouno, H., Mihara, M. Fukuda M., Matsuta, K., Tsunemi, H., Tanaka, K., Minamisono, T, Tomida, H., Miyaguchi, K.
We have investigated the radiation damage effects on a CCD to be employed in the Japanese X-ray astronomy mission including the Monitor of All-sky X-ray Image (MAXI) onboard the International Space Station (ISS). Since low energy protons release thei
Externí odkaz:
http://arxiv.org/abs/physics/0208090
Autor:
Miyata, E., Miki, M., Hiraga, J., Kouno, H., Yasui, K., Tsunemi, H., Miyaguchi, K., Yamamoto, K.
We have employed a mesh experiment for back-illuminated (BI) CCDs. BI CCDs possess the same structure to those of FI CCDs. Since X-ray photons enter from the back surface of the CCD, a primary charge cloud is formed far from the electrodes. The prima
Externí odkaz:
http://arxiv.org/abs/physics/0206021
A charge-coupled device (CCD) is a standard imager in optical region in which the image quality is limited by its pixel size. CCDs also function in X-ray region but with substantial differences in performance. An optical photon generates only one ele
Externí odkaz:
http://arxiv.org/abs/astro-ph/0204014
Publikováno v:
Int.J.Mod.Phys. E9 (2000) 169-183
Based on quantum hadrodynamics with a finite cutoff, the effective masses of vector mesons(\omega, \rho) in nuclear medium are calculated. We use a low-energy effective Lagrangian which is obtained by integrating high-energy quantum fluctuations. Alt
Externí odkaz:
http://arxiv.org/abs/nucl-th/9909054
The dispersion relations in the real and imaginary parts of the meson self-energies are studied to check the consistency of the "renormalization" in cutoff field theory. It is shown that the dispersion relations are preserved by the "renormalization"
Externí odkaz:
http://arxiv.org/abs/nucl-th/9903011
Publikováno v:
Prog.Theor.Phys. 100 (1998) 211-216
An enhancement of antiprotons produced in p+d reaction in comparison with ones in p+p elementary reaction is investigated. In the neighborhood of subthreshold energy the enhancement is caused by the difference of available energies for antiproton pro
Externí odkaz:
http://arxiv.org/abs/nucl-th/9803010