Zobrazeno 1 - 10
of 451
pro vyhledávání: '"Park, Seong-Chan"'
We employ the effective field theory approach to analyze the characteristics of Euclidean wormholes within axion theories. Using this approach, we obtain non-perturbative instantons in various complex scalar models with and without a non-minimal coup
Externí odkaz:
http://arxiv.org/abs/2310.11260
Rich physics can be divined from charged black holes subjected to extremal conditions. When applied in conjunction with principles like Weak Cosmic Censorship, this naturally leads to constraints on the mass and charge of the black hole. However, mor
Externí odkaz:
http://arxiv.org/abs/2310.07311
Higgs inflation with a Gauss-Bonnet term is studied in the Einstein frame. Our model features two coupling functions, $\Omega^2(\phi)$ and $\omega(\phi)$, coupled to the Ricci scalar and Gauss-Bonnet combinations. We found a special relation $\Omega^
Externí odkaz:
http://arxiv.org/abs/2308.00897
Autor:
Lee, Sung Mook, Kang, Dong Woo, Gong, Jinn-Ouk, Jeong, Donghui, Jung, Dong-Won, Park, Seong Chan
We study the kinetic mixing between the cosmic microwave background (CMB) photon and the birefringent dark photon. These birefringent dark photon may exist in parity-violating dark sector, for example, through the coupling to axion field. We show tha
Externí odkaz:
http://arxiv.org/abs/2307.14798
We investigate the possibility that inflation originates from a composite field theory, in terms of an effective chiral Lagrangian involving a dilaton and pions. The walking dynamics of the theory constrain the potential in a specific way, where the
Externí odkaz:
http://arxiv.org/abs/2307.01852
The effects of a scalar field, known as the "assistant field," which nonminimally couples to gravity, on single-field inflationary models are studied. The analysis provides analytical expressions for inflationary observables such as the spectral inde
Externí odkaz:
http://arxiv.org/abs/2302.05866
We present DeeLeMa, a deep learning network to analyze energies and momenta in particle collisions at high energy colliders, especially DeeLeMa is constructed based on symmetric event topology, and the generated mass distributions show robust peaks a
Externí odkaz:
http://arxiv.org/abs/2212.12836
Primordial black holes (PBHs) can be significant sources of axions and axion-like particles (ALPs) in the Universe as the Hawking radiation of the PBH includes light particles when the Hawking temperature exceeds the particle's mass. Once produced, a
Externí odkaz:
http://arxiv.org/abs/2212.11977
Autor:
Cheong, Dhong Yeon, Hamaguchi, Koichi, Kanazawa, Yoshiki, Lee, Sung Mook, Nagata, Natsumi, Park, Seong Chan
In axion models, the global U(1) Peccei-Quinn (PQ) symmetry is explicitly broken by non-perturbative effects of gravity, such as axionic wormholes. The gravitational violation of the PQ symmetry due to wormholes is large enough to invalidate the PQ m
Externí odkaz:
http://arxiv.org/abs/2210.11330
Autor:
Ban, Kayoung, Cheong, Dhong Yeon, Okada, Hiroshi, Otsuka, Hajime, Park, Jong-Chul, Park, Seong Chan
Publikováno v:
Progress of Theoretical and Experimental Physics, Volume 2023, Issue 1, January 2023, 013B04
We apply the Festina Lente (FL) bound on a hidden sector with $U(1)$ gauge symmetries. Since the FL bound puts a lower bound on masses of particles charged under the $U(1)$ gauge symmetries, it is possible to constrain the hidden sector even with a t
Externí odkaz:
http://arxiv.org/abs/2206.00890