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Takashi Umeda - One of the best experts on this subject based on the ideXlab platform.
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Renormalization group flow of SU(3) lattice gauge theory : Numerical studies in a two coupling space
Nuclear Physics, 2000Co-Authors: Ph. De Forcrand, M. García Pérez, Takaaki Hashimoto, S. Hioki, Hideo Matsufuru, Osamu Miyamura, Atsushi Nakamura, Ion-olimpiu Stamatescu, Tetsuya Takaishi, Takashi UmedaAbstract:We investigate the renormalization group (RG) flow of SU(3) lattice gauge theory in a two coupling space with couplings β11 and β12 corresponding to 1×1 and 1×2 loops, respectively. Extensive numerical calculations of the RG flow are made in the Fourth Quadrant of this coupling space, i.e., β11>0 and β12
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Renormalization group flow of SU(3) lattice gauge theory. Numerical studies in a two coupling space
Nuclear Physics B, 2000Co-Authors: Ph. De Forcrand, Takaaki Hashimoto, S. Hioki, Hideo Matsufuru, Osamu Miyamura, Atsushi Nakamura, Ion-olimpiu Stamatescu, Tetsuya Takaishi, M. Garcı́a Pérez, Takashi UmedaAbstract:We investigate the renormalization group (RG) flow of SU(3) lattice gauge theory in a two coupling space with couplings $\beta_{11}$ and $\beta_{12}$ corresponding to $1\times 1$ and $1\times 2$ loops respectively. Extensive numerical calculations of the RG flow are made in the Fourth Quadrant of this coupling space, i.e., $\beta_{11}>0$ and $\beta_{12}
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renormalization group flow of su 3 lattice gauge theory numerical studies in a two coupling space
arXiv: High Energy Physics - Lattice, 1999Co-Authors: Ph. De Forcrand, Takaaki Hashimoto, S. Hioki, Hideo Matsufuru, Osamu Miyamura, Atsushi Nakamura, Ion-olimpiu Stamatescu, Tetsuya Takaishi, Garcia M Perez, Takashi UmedaAbstract:We investigate the renormalization group (RG) flow of SU(3) lattice gauge theory in a two coupling space with couplings $\beta_{11}$ and $\beta_{12}$ corresponding to $1\times 1$ and $1\times 2$ loops respectively. Extensive numerical calculations of the RG flow are made in the Fourth Quadrant of this coupling space, i.e., $\beta_{11}>0$ and $\beta_{12}<0$. Swendsen's factor two blocking and the Schwinger-Dyson method are used to find an effective action for the blocked gauge field. The resulting renormalization group flow runs quickly towards an attractive stream which has an approximate line shape. This is numerical evidence of a renormalized trajectory which locates close to the two coupling space. A model flow equation which incorporates a marginal coupling (asymptotic scaling term), an irrelevant coupling and a non-perturbative attraction towards the strong coupling limit reproduces qualitatively the observed features. We further examine the scaling properties of an action which is closer to the attractive stream than the currently used improved actions. It is found that this action shows excellent restoration of rotational symmetry even for coarse lattices with $a \sim 0.3$ fm.
Ph. De Forcrand - One of the best experts on this subject based on the ideXlab platform.
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Renormalization group flow of SU(3) lattice gauge theory : Numerical studies in a two coupling space
Nuclear Physics, 2000Co-Authors: Ph. De Forcrand, M. García Pérez, Takaaki Hashimoto, S. Hioki, Hideo Matsufuru, Osamu Miyamura, Atsushi Nakamura, Ion-olimpiu Stamatescu, Tetsuya Takaishi, Takashi UmedaAbstract:We investigate the renormalization group (RG) flow of SU(3) lattice gauge theory in a two coupling space with couplings β11 and β12 corresponding to 1×1 and 1×2 loops, respectively. Extensive numerical calculations of the RG flow are made in the Fourth Quadrant of this coupling space, i.e., β11>0 and β12
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renormalization group flow of su 3 lattice gauge theory numerical studies in a two coupling space
Nuclear Physics, 2000Co-Authors: Ph. De Forcrand, Takaaki Hashimoto, S. Hioki, Hideo Matsufuru, Osamu Miyamura, Atsushi Nakamura, Ion-olimpiu Stamatescu, Garcia M Perez, Tetsuya TakaishiAbstract:We investigate the renormalization group (RG) flow of SU(3) lattice gauge theory in a two coupling space with couplings β11 and β12 corresponding to 1×1 and 1×2 loops, respectively. Extensive numerical calculations of the RG flow are made in the Fourth Quadrant of this coupling space, i.e., β11>0 and β12<0 . Swendsen's factor two blocking and the Schwinger–Dyson method are used to find an effective action for the blocked gauge field. The resulting renormalization group flow runs quickly towards an attractive stream which has an approximate line shape. This is a numerical evidence of a renormalized trajectory which locates close to the two coupling space. A model flow equation which incorporates a marginal coupling (asymptotic scaling term), an irrelevant coupling and a non-perturbative attraction towards the strong coupling limit reproduces qualitatively the observed features. We further examine the scaling properties of an action which is closer to the attractive stream than the currently used improved actions. It is found that this action shows excellent restoration of rotational symmetry even for coarse lattices with a∼0.3 fm.
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Renormalization group flow of SU(3) lattice gauge theory. Numerical studies in a two coupling space
Nuclear Physics B, 2000Co-Authors: Ph. De Forcrand, Takaaki Hashimoto, S. Hioki, Hideo Matsufuru, Osamu Miyamura, Atsushi Nakamura, Ion-olimpiu Stamatescu, Tetsuya Takaishi, M. Garcı́a Pérez, Takashi UmedaAbstract:We investigate the renormalization group (RG) flow of SU(3) lattice gauge theory in a two coupling space with couplings $\beta_{11}$ and $\beta_{12}$ corresponding to $1\times 1$ and $1\times 2$ loops respectively. Extensive numerical calculations of the RG flow are made in the Fourth Quadrant of this coupling space, i.e., $\beta_{11}>0$ and $\beta_{12}
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renormalization group flow of su 3 lattice gauge theory numerical studies in a two coupling space
arXiv: High Energy Physics - Lattice, 1999Co-Authors: Ph. De Forcrand, Takaaki Hashimoto, S. Hioki, Hideo Matsufuru, Osamu Miyamura, Atsushi Nakamura, Ion-olimpiu Stamatescu, Tetsuya Takaishi, Garcia M Perez, Takashi UmedaAbstract:We investigate the renormalization group (RG) flow of SU(3) lattice gauge theory in a two coupling space with couplings $\beta_{11}$ and $\beta_{12}$ corresponding to $1\times 1$ and $1\times 2$ loops respectively. Extensive numerical calculations of the RG flow are made in the Fourth Quadrant of this coupling space, i.e., $\beta_{11}>0$ and $\beta_{12}<0$. Swendsen's factor two blocking and the Schwinger-Dyson method are used to find an effective action for the blocked gauge field. The resulting renormalization group flow runs quickly towards an attractive stream which has an approximate line shape. This is numerical evidence of a renormalized trajectory which locates close to the two coupling space. A model flow equation which incorporates a marginal coupling (asymptotic scaling term), an irrelevant coupling and a non-perturbative attraction towards the strong coupling limit reproduces qualitatively the observed features. We further examine the scaling properties of an action which is closer to the attractive stream than the currently used improved actions. It is found that this action shows excellent restoration of rotational symmetry even for coarse lattices with $a \sim 0.3$ fm.
Tetsuya Takaishi - One of the best experts on this subject based on the ideXlab platform.
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Renormalization group flow of SU(3) lattice gauge theory : Numerical studies in a two coupling space
Nuclear Physics, 2000Co-Authors: Ph. De Forcrand, M. García Pérez, Takaaki Hashimoto, S. Hioki, Hideo Matsufuru, Osamu Miyamura, Atsushi Nakamura, Ion-olimpiu Stamatescu, Tetsuya Takaishi, Takashi UmedaAbstract:We investigate the renormalization group (RG) flow of SU(3) lattice gauge theory in a two coupling space with couplings β11 and β12 corresponding to 1×1 and 1×2 loops, respectively. Extensive numerical calculations of the RG flow are made in the Fourth Quadrant of this coupling space, i.e., β11>0 and β12
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renormalization group flow of su 3 lattice gauge theory numerical studies in a two coupling space
Nuclear Physics, 2000Co-Authors: Ph. De Forcrand, Takaaki Hashimoto, S. Hioki, Hideo Matsufuru, Osamu Miyamura, Atsushi Nakamura, Ion-olimpiu Stamatescu, Garcia M Perez, Tetsuya TakaishiAbstract:We investigate the renormalization group (RG) flow of SU(3) lattice gauge theory in a two coupling space with couplings β11 and β12 corresponding to 1×1 and 1×2 loops, respectively. Extensive numerical calculations of the RG flow are made in the Fourth Quadrant of this coupling space, i.e., β11>0 and β12<0 . Swendsen's factor two blocking and the Schwinger–Dyson method are used to find an effective action for the blocked gauge field. The resulting renormalization group flow runs quickly towards an attractive stream which has an approximate line shape. This is a numerical evidence of a renormalized trajectory which locates close to the two coupling space. A model flow equation which incorporates a marginal coupling (asymptotic scaling term), an irrelevant coupling and a non-perturbative attraction towards the strong coupling limit reproduces qualitatively the observed features. We further examine the scaling properties of an action which is closer to the attractive stream than the currently used improved actions. It is found that this action shows excellent restoration of rotational symmetry even for coarse lattices with a∼0.3 fm.
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Renormalization group flow of SU(3) lattice gauge theory. Numerical studies in a two coupling space
Nuclear Physics B, 2000Co-Authors: Ph. De Forcrand, Takaaki Hashimoto, S. Hioki, Hideo Matsufuru, Osamu Miyamura, Atsushi Nakamura, Ion-olimpiu Stamatescu, Tetsuya Takaishi, M. Garcı́a Pérez, Takashi UmedaAbstract:We investigate the renormalization group (RG) flow of SU(3) lattice gauge theory in a two coupling space with couplings $\beta_{11}$ and $\beta_{12}$ corresponding to $1\times 1$ and $1\times 2$ loops respectively. Extensive numerical calculations of the RG flow are made in the Fourth Quadrant of this coupling space, i.e., $\beta_{11}>0$ and $\beta_{12}
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renormalization group flow of su 3 lattice gauge theory numerical studies in a two coupling space
arXiv: High Energy Physics - Lattice, 1999Co-Authors: Ph. De Forcrand, Takaaki Hashimoto, S. Hioki, Hideo Matsufuru, Osamu Miyamura, Atsushi Nakamura, Ion-olimpiu Stamatescu, Tetsuya Takaishi, Garcia M Perez, Takashi UmedaAbstract:We investigate the renormalization group (RG) flow of SU(3) lattice gauge theory in a two coupling space with couplings $\beta_{11}$ and $\beta_{12}$ corresponding to $1\times 1$ and $1\times 2$ loops respectively. Extensive numerical calculations of the RG flow are made in the Fourth Quadrant of this coupling space, i.e., $\beta_{11}>0$ and $\beta_{12}<0$. Swendsen's factor two blocking and the Schwinger-Dyson method are used to find an effective action for the blocked gauge field. The resulting renormalization group flow runs quickly towards an attractive stream which has an approximate line shape. This is numerical evidence of a renormalized trajectory which locates close to the two coupling space. A model flow equation which incorporates a marginal coupling (asymptotic scaling term), an irrelevant coupling and a non-perturbative attraction towards the strong coupling limit reproduces qualitatively the observed features. We further examine the scaling properties of an action which is closer to the attractive stream than the currently used improved actions. It is found that this action shows excellent restoration of rotational symmetry even for coarse lattices with $a \sim 0.3$ fm.
Ion-olimpiu Stamatescu - One of the best experts on this subject based on the ideXlab platform.
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Renormalization group flow of SU(3) lattice gauge theory : Numerical studies in a two coupling space
Nuclear Physics, 2000Co-Authors: Ph. De Forcrand, M. García Pérez, Takaaki Hashimoto, S. Hioki, Hideo Matsufuru, Osamu Miyamura, Atsushi Nakamura, Ion-olimpiu Stamatescu, Tetsuya Takaishi, Takashi UmedaAbstract:We investigate the renormalization group (RG) flow of SU(3) lattice gauge theory in a two coupling space with couplings β11 and β12 corresponding to 1×1 and 1×2 loops, respectively. Extensive numerical calculations of the RG flow are made in the Fourth Quadrant of this coupling space, i.e., β11>0 and β12
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renormalization group flow of su 3 lattice gauge theory numerical studies in a two coupling space
Nuclear Physics, 2000Co-Authors: Ph. De Forcrand, Takaaki Hashimoto, S. Hioki, Hideo Matsufuru, Osamu Miyamura, Atsushi Nakamura, Ion-olimpiu Stamatescu, Garcia M Perez, Tetsuya TakaishiAbstract:We investigate the renormalization group (RG) flow of SU(3) lattice gauge theory in a two coupling space with couplings β11 and β12 corresponding to 1×1 and 1×2 loops, respectively. Extensive numerical calculations of the RG flow are made in the Fourth Quadrant of this coupling space, i.e., β11>0 and β12<0 . Swendsen's factor two blocking and the Schwinger–Dyson method are used to find an effective action for the blocked gauge field. The resulting renormalization group flow runs quickly towards an attractive stream which has an approximate line shape. This is a numerical evidence of a renormalized trajectory which locates close to the two coupling space. A model flow equation which incorporates a marginal coupling (asymptotic scaling term), an irrelevant coupling and a non-perturbative attraction towards the strong coupling limit reproduces qualitatively the observed features. We further examine the scaling properties of an action which is closer to the attractive stream than the currently used improved actions. It is found that this action shows excellent restoration of rotational symmetry even for coarse lattices with a∼0.3 fm.
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Renormalization group flow of SU(3) lattice gauge theory. Numerical studies in a two coupling space
Nuclear Physics B, 2000Co-Authors: Ph. De Forcrand, Takaaki Hashimoto, S. Hioki, Hideo Matsufuru, Osamu Miyamura, Atsushi Nakamura, Ion-olimpiu Stamatescu, Tetsuya Takaishi, M. Garcı́a Pérez, Takashi UmedaAbstract:We investigate the renormalization group (RG) flow of SU(3) lattice gauge theory in a two coupling space with couplings $\beta_{11}$ and $\beta_{12}$ corresponding to $1\times 1$ and $1\times 2$ loops respectively. Extensive numerical calculations of the RG flow are made in the Fourth Quadrant of this coupling space, i.e., $\beta_{11}>0$ and $\beta_{12}
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renormalization group flow of su 3 lattice gauge theory numerical studies in a two coupling space
arXiv: High Energy Physics - Lattice, 1999Co-Authors: Ph. De Forcrand, Takaaki Hashimoto, S. Hioki, Hideo Matsufuru, Osamu Miyamura, Atsushi Nakamura, Ion-olimpiu Stamatescu, Tetsuya Takaishi, Garcia M Perez, Takashi UmedaAbstract:We investigate the renormalization group (RG) flow of SU(3) lattice gauge theory in a two coupling space with couplings $\beta_{11}$ and $\beta_{12}$ corresponding to $1\times 1$ and $1\times 2$ loops respectively. Extensive numerical calculations of the RG flow are made in the Fourth Quadrant of this coupling space, i.e., $\beta_{11}>0$ and $\beta_{12}<0$. Swendsen's factor two blocking and the Schwinger-Dyson method are used to find an effective action for the blocked gauge field. The resulting renormalization group flow runs quickly towards an attractive stream which has an approximate line shape. This is numerical evidence of a renormalized trajectory which locates close to the two coupling space. A model flow equation which incorporates a marginal coupling (asymptotic scaling term), an irrelevant coupling and a non-perturbative attraction towards the strong coupling limit reproduces qualitatively the observed features. We further examine the scaling properties of an action which is closer to the attractive stream than the currently used improved actions. It is found that this action shows excellent restoration of rotational symmetry even for coarse lattices with $a \sim 0.3$ fm.
S. T. Megeath - One of the best experts on this subject based on the ideXlab platform.
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a near infrared millimeter wave study of six Fourth Quadrant high mass star formation regions
The Astronomical Journal, 2004Co-Authors: P. K. Sollins, S. T. MegeathAbstract:We present near-infrared and millimeter-wave observations of six high-mass star-forming regions in the Fourth Quadrant: RCW 108, G333.6, RCW 117, RCW 122, NGC 6334 I, and G351.6. These regions have heliocentric distances of 1.3–3.0 kpc and total luminosities ranging from 0.5 to 3 × 105 L⊙. Millimeter maps taken in transitions of C18O, HC3N, 12C16O, and SiO with the Swedish-ESO Submillimetre Telescope 15 m telescope detail the structure and kinematics of the clouds. Near-infrared K-band images of the same regions obtained with the MPG/ESO 2.2 m telescope are used to map the stellar surface density. The C18O (1 → 0) line shows extended high column density gas, with column densities ranging from 1022 to 3 × 1023 cm-2; in contrast, the HC3N (15 → 14) emission shows eight sharply peaked dense cores. We examine these cores for recent and ongoing star formation by searching for high-velocity, non-Gaussian wings on the CO (1 → 0) and SiO (2 → 1) lines, peaks in the surface density of stars, and positional coincidences with IRAS point sources, as well as masers and H II regions reported in the literature. All of the cores show evidence of ongoing star formation. NGC 6334 I(N) stands out as a unique case in which an outflow has formed and masers have appeared, but no IRAS source, K-band cluster, or UC H II region has yet appeared; our data support previous claims that this is a rare example of a core in the earliest stages of forming a cluster of high- and low-mass stars.
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A Near-Infrared/Millimeter-Wave Study of Six Fourth-Quadrant High-Mass Star Formation Regions
The Astronomical Journal, 2004Co-Authors: P. K. Sollins, S. T. MegeathAbstract:We present near-infrared and millimeter-wave observations of six high-mass star-forming regions in the Fourth Quadrant: RCW 108, G333.6, RCW 117, RCW 122, NGC 6334 I, and G351.6. These regions have heliocentric distances of 1.3–3.0 kpc and total luminosities ranging from 0.5 to 3 × 105 L⊙. Millimeter maps taken in transitions of C18O, HC3N, 12C16O, and SiO with the Swedish-ESO Submillimetre Telescope 15 m telescope detail the structure and kinematics of the clouds. Near-infrared K-band images of the same regions obtained with the MPG/ESO 2.2 m telescope are used to map the stellar surface density. The C18O (1 → 0) line shows extended high column density gas, with column densities ranging from 1022 to 3 × 1023 cm-2; in contrast, the HC3N (15 → 14) emission shows eight sharply peaked dense cores. We examine these cores for recent and ongoing star formation by searching for high-velocity, non-Gaussian wings on the CO (1 → 0) and SiO (2 → 1) lines, peaks in the surface density of stars, and positional coincidences with IRAS point sources, as well as masers and H II regions reported in the literature. All of the cores show evidence of ongoing star formation. NGC 6334 I(N) stands out as a unique case in which an outflow has formed and masers have appeared, but no IRAS source, K-band cluster, or UC H II region has yet appeared; our data support previous claims that this is a rare example of a core in the earliest stages of forming a cluster of high- and low-mass stars.
