- 著者
- Izubuchi Taku Noaki Junichi Ukawa Akira
- 出版者
- American Physical Society
- 雑誌
- Physical review D (ISSN:15507998)
- 巻号頁・発行日
- vol.58, no.11, pp.114507, 1998-12
- 被引用文献数
- 10 17
We investigate the phase structure of the two-dimensional lattice Gross-Neveu model formulated with theWilson fermion action to leading order of 1/N expansion. The structural change of the parity-broken phaseunder the influence of finite temperature and chemical potential is studied. The connection between the latticephase structure and the chiral phase transition of the continuum theory is clarified.
- 著者
- Aoki Sinya Nagai Kei-ichi Taniguchi Yusuke Ukawa Akira
- 出版者
- American Physical Society
- 雑誌
- Physical review.D (ISSN:15507998)
- 巻号頁・発行日
- vol.58, no.7, pp.074505, 1998-10
- 被引用文献数
- 44 90
We calculate one-loop renormalization factors of bilinear quark operators for the gluon action includingsix-link loops and an O(a)-improved quark action in the limit of a massless quark. We find that finite parts ofthe one-loop coefficients of renormalization factors diminish monotonically as either of the coefficients c1 orc21c3 of the six-link terms is decreased below zero. Detailed numerical results are given, for general valuesof the clover coefficient, for the tree-level improved gluon action in the Symanzik approach (c1521/12,c25c350) and for the choices suggested by Wilson (c1520.252,c250,c3520.17) and by Iwasaki (c1520.331,c25c350 and c1520.27,c21c3520.04) from renormalization-group analyses. Compared with thecase of the standard plaquette gluon action, the finite parts of the one-loop coefficients are reduced by 10–20 %for the Symanzik action, and approximately by a factor of 2 for the renormalization-group improved gluonactions.
- 著者
- Taniguchi Yusuke Ukawa Akira
- 出版者
- American Physical Society
- 雑誌
- Physical review D (ISSN:05562821)
- 巻号頁・発行日
- vol.58, no.11, pp.114503, 1998-10
- 被引用文献数
- 38 60
We calculate the O(g2a) mixing coefficients of bilinear quark operators in lattice QCD using a standard perturbative evaluation of on-shell Green’s functions. Our results for the plaquette gluon action are in agreement with those previously obtained with the Schrödinger functional method. The coefficients are also calculated for a class of improved gluon actions having six-link terms.
- 著者
- Yamazaki Takeshi Ishikawa Ken-ichi Kuramashi Yoshinobu Ukawa Akira
- 出版者
- American Physical Society
- 雑誌
- Physical review D (ISSN:15507998)
- 巻号頁・発行日
- vol.86, no.7, pp.074514, 2012-10
- 被引用文献数
- 92
We calculate the binding energies for multinucleon bound states with the nuclear mass number less than or equal to 4 in 2+1 flavor QCD at the lattice spacing of a=0.09 fm employing a relatively heavy quark mass corresponding to mπ=0.51 GeV. To distinguish a bound state from attractive scattering states, we investigate the volume dependence of the energy shift between the ground state and the state of free nucleons by changing the spatial extent of the lattice from 2.9 to 5.8 fm. We conclude that 4He, 3He, deuteron and dineutron are bound at mπ=0.51 GeV. We compare their binding energies with those in our quenched studies and also with several previous investigations.