Zobrazeno 1 - 10
of 41
pro vyhledávání: '"Abe, Yugo"'
We consider the theory of a higher-derivative (HD) real scalar field $\phi$ coupled to a complex scalar $\sigma$, the coupling of the $\phi$ and $\sigma$ being given by two types, $\lambda_{\sigma\phi}\sigma^\dagger \sigma\phi^{2}$ and $\xi_{\sigma\p
Externí odkaz:
http://arxiv.org/abs/2408.02276
We obtain the matter-graviton scattering amplitude in the gravitational theory of quadratic curvature, which has $R_{\mu\nu}^2$ term in the action. Unitarity bound is not satisfied because of the existence of negative norm states, while an analog of
Externí odkaz:
http://arxiv.org/abs/2210.13666
We show that in the quadratic curvature theory of gravity, or simply $R_{\mu \nu} ^2$ gravity, the tree-level unitariy bound (tree unitarity) is violated in the UV region but an analog for $S$-matrix unitarity ($SS^{\dagger} = 1$) is satisfied. This
Externí odkaz:
http://arxiv.org/abs/2012.01717
Publikováno v:
Prog Theor Exp Phys (2019)
We investigate the relation between the $S$-matrix unitarity ($SS^{\dagger}=1$) and the renormalizability, in theories with negative norm states. The relation has been confirmed in many theories, such as gauge theories, Einstein gravity and Lifshitz-
Externí odkaz:
http://arxiv.org/abs/1805.00262
Publikováno v:
Prog Theor Exp Phys (2018)
We study the origin of electroweak symmetry under the assumption that $SU(4)_{\rm C} \times SU(2)_{\rm L} \times SU(2)_{\rm R}$ is realized on a five-dimensional space-time. The Pati-Salam type gauge symmetry is reduced to $SU(3)_{\rm C} \times SU(2)
Externí odkaz:
http://arxiv.org/abs/1804.08836
Publikováno v:
Prog Theor Exp Phys (2018)
We investigate the ultraviolet (UV) behavior of two-scalar elastic scattering with graviton exchanges in higher curvature gravity theory. In the Einstein gravity, matter scattering is shown not to satisfy tree unitarity at high energy. Among a few po
Externí odkaz:
http://arxiv.org/abs/1712.06305
We study the discovery potential for the mixing of heavy isospin-singlet neutrinos in extensions of the Tokai-to-Kamioka (T2K) experiment: The Tokai-to-Hyper-Kamiokande (T2HK), the Tokai-to-Hyper-Kamiokande-to-Korea (T2HKK), and a plan of adding a ne
Externí odkaz:
http://arxiv.org/abs/1705.03818
Publikováno v:
Mod. Phys. Lett. A, Vol. 31, No. 35 (2016) 1650208
We propose an idea that hidden particles can be separated according to gauge quantum numbers from the visible ones by the difference of boundary conditions on extra dimensions. We formulate 5-dimensional gauge theories yielding conjugate boundary con
Externí odkaz:
http://arxiv.org/abs/1608.06393
Publikováno v:
International Journal of Modern Physics A, Vol.32 (2017) 1750037
We study physics concerning the cosmological constant problem in the framework of effective field theory and suggest that a dominant part of dark energy can originate from gravitational corrections of vacuum energy, under the assumption that the clas
Externí odkaz:
http://arxiv.org/abs/1603.07434
We evaluate quantum gravity corrections to the standard model Higgs potential $V(\phi)$ a la Coleman-Weinberg and examine the stability question of $V(\phi)$ at scales of Planck mass $M_{\rm Pl}$. We compute the gravity one-loop corrections by using
Externí odkaz:
http://arxiv.org/abs/1603.00192