Zobrazeno 1 - 10
of 216
pro vyhledávání: '"sugimoto, shigeki"'
We investigate the high-energy fixed-angle scattering of pions and $\rho$-mesons in a bottom-up holographic QCD model. To this end, we generalise the approach of Polchinski and Strassler arXiv:hep-th/0109174 to write an ansatz for meson scattering am
Externí odkaz:
http://arxiv.org/abs/2412.17784
Autor:
Sugimoto, Shigeki, Suzuki, Yu-ki
We consider dimensional reduction of cigar geometries which are obtained by a Wick rotation of black hole solutions. Originally the cigar geometry is smooth around the tip, but after the dimensional reduction along the Euclidean time direction, there
Externí odkaz:
http://arxiv.org/abs/2312.07891
Publikováno v:
Prog. Theor. Exp. Phys. 2022 093B06
The D-term is one of the conserved charges of hadrons defined as the forward limit of the gravitational form factor $D(t)$. We calculate the nucleon's D-term in a holographic QCD model in which the nucleon is described as a soliton in five dimensions
Externí odkaz:
http://arxiv.org/abs/2206.06578
Autor:
Kanno, Hayato, Sugimoto, Shigeki
Publikováno v:
Progress of Theoretical and Experimental Physics, Volume 2022, Issue 1, January 2022, 013B02
We study anomalies of fermions with spacetime dependent mass. Using Fujikawa's method, it is found that the anomalies associated with the $U(N)_+\times U(N)_-$ chiral symmetry and $U(N)$ flavor symmetry for even and odd dimensions, respectively, can
Externí odkaz:
http://arxiv.org/abs/2106.01591
Autor:
Park, Jeong-Hyuck, Sugimoto, Shigeki
Publikováno v:
Phys. Rev. Lett. 125, 211601 (2020)
The $\mathbf{O}(D,D)$ covariant generalized metric, postulated as a truly fundamental variable, can describe novel geometries where the notion of Riemannian metric ceases to exist. Here we quantize a closed string upon such backgrounds and identify f
Externí odkaz:
http://arxiv.org/abs/2008.03084
Publikováno v:
Prog Theor Exp Phys (2020)
We analyze excited baryon states using a holographic dual of QCD that is defined on the basis of an intersecting D4/D8-brane system. Studies of baryons in this model have been made by regarding them as a topological soliton of a gauge theory on a fiv
Externí odkaz:
http://arxiv.org/abs/2001.01461
Autor:
Armoni, Adi, Sugimoto, Shigeki
We study the vacuum structure of N_f flavour two-dimensional QED with an arbitrary integer charge k. We find that the axial symmetry is spontaneously broken from Z_(kN_f) to Z_(N_f) due to the non-vanishing condensate of a flavour singlet operator, r
Externí odkaz:
http://arxiv.org/abs/1812.10064
We study deformations of ${\cal N}=4$ supersymmetric Yang-Mills theory with space-time dependent couplings by embedding probe D3-branes in supergravity backgrounds with non-trivial fluxes. The effective action on the world-volume of the D3-branes is
Externí odkaz:
http://arxiv.org/abs/1801.09394
We study deformations of ${\cal N}=4$ supersymmetric Yang-Mills theory with couplings and masses depending on space-time. The conditions to preserve part of the supersymmetry are derived and a lot of solutions of these conditions are found. The main
Externí odkaz:
http://arxiv.org/abs/1710.09792
Autor:
Lau, Pak Hang Chris, Sugimoto, Shigeki
Publikováno v:
Phys. Rev. D 95, 126007 (2017)
In the top-down holographic model of QCD based on D4/D8-branes in type IIA string theory and some of the bottom up models, the low energy effective theory of mesons is described by a 5 dimensional Yang-Mills-Chern-Simons theory in a certain curved ba
Externí odkaz:
http://arxiv.org/abs/1612.09503