15 Result(s)
within
Chang Sub Shin
Quantum Physics
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Article
Open AccessEffective theory approach for axion wormholes
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 m...
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Open AccessAxion emission from supernova with axion-pion-nucleon contact interaction
We examine the axion emission from supernovae with a complete set of relevant axion couplings including the axion-pion-nucleon contact interaction which was ignored in the previous studies. Two processes are a...
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Open AccessDark gauge boson production from neutron stars via nucleon-nucleon bremsstrahlung
We discuss the dark gauge boson emission from neutron stars via nucleon-nucleon bremsstrahlung. Through the rigorous treatment of the effective field theory prescription and the thermal effect, we derive the r...
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Open AccessAligned natural inflation in the Large Volume Scenario
We embed natural inflation in an explict string theory model and derive observables in cosmology. We achieve this by compactifying the type IIB string on a Calabi-Yau orientifold, stabilizing moduli via the La...
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Open AccessMagnetogenesis from a rotating scalar: à la scalar chiral magnetic effect
The chiral magnetic effect (CME) is a phenomenon in which an electric current is induced parallel to an external magnetic field in the presence of chiral asymmetry in a fermionic system. In this paper, we show...
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Open AccessAxion scales and couplings with Stückelberg mixing
We study the axion field range and low energy couplings in models with Stückelberg mixing between axions and U(1) gauge bosons. It is noted that the gauge- invariant axion combination ξ in the model is periodic m...
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Open AccessThe dS swampland conjecture with the electroweak symmetry and QCD chiral symmetry breaking
The dS swampland conjecture |∇V|/V ≥ c, where c is presumed to be a positive constant of order unity, implies that the dark energy density of our Universe can not be a cosmological constant, but mostly the potent...
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Open AccessGeneral continuum clockwork
The continuum clockwork is an extra-dimensional set-up to realize certain features of the clockwork mechanism generating exponentially suppressed or hierarchical couplings of light particles. We study the cont...
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Open AccessPeccei-Quinn relaxion
The relaxation mechanism, which solves the electroweak hierarchy problem without relying on TeV scale new physics, crucially depends on how a Higgs-dependent back-reaction potential is generated. In this paper...
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Open AccessLSP baryogenesis and neutron-antineutron oscillations from R-parity violation
R-parity and baryon number violating operators can be allowed in the Super-symmetric Standard Model and thus lead to interesting baryon number violating processes such as
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Open AccessPhenomenology in supersymmetric neutrinophilic Higgs model with sneutrino dark matter
We study a supersymmetric neutrinophilic Higgs model with large neutrino Yukawa couplings where neutrinos are Dirac particles and the lightest right-handed (RH) sneutrino is the lightest supersymmetric particl...
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Vector-like leptons and extra gauge symmetry for the natural Higgs boson
For raising the radiative Higgs mass without a serious fine-tuning in the Higgs sector, we introduce vector-like lepton doublets and neutral singlets {L, L c ; N...
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Peccei-Quinn NMSSM in the light of 125 GeV Higgs
We study the phenomenology of the Peccei-Quinn invariant extension of the next-to-minimal supersymmetric standard model (NMSSM) in view of the recent discovery of a 125 GeV Higgs boson. The minimal model havin...
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Anomalous U(1) mediation in large volume compactification
We study the general effects of anomalous U(1)A gauge symmetry on soft supersymmetry (SUSY) breaking terms in large volume scenario, where the MSSM sector is localized on a small cycle whose volume is stabilized ...
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Sparticle spectrum of large volume compactification
We examine the large volume compactification of Type IIB string theory or its F theory limit and the associated supersymmetry breakdown and soft terms. It is crucial to incorporate the loop-induced moduli mixing,...
