782 citations · 8.5k across the 161 of their papers we have counts for
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The dS swampland conjecture with the electroweak symmetry and QCD chiral symmetry breaking
Kiwoon Choi, Dongjin Chway, Chang Sub Shin
The dS swampland conjecture , where is presumed to be a positive constant of order unity, implies that the dark energy density of our Universe can not be a…
Aligned natural inflation with modulations
Kiwoon Choi, Hyungjin Kim
The weak gravity conjecture applied for the aligned natural inflation indicates that generically there can be a modulation of the inflaton potential, with a period determined by su…
Perspective on completing natural inflation
Ki-Young Choi, Jihn E. Kim, Bumseok Kyae
We present a perspective on the inflation paths in 2-, 3-,,, N-flation models based on the ultraviolet completion in heterotic string theory, where a number of grand unification sc…
Large tensor spectrum of BICEP2 in the natural SUSY hybrid model
Ki-Young Choi, Bumseok Kyae
The large tensor spectrum recently observed by the BICEP2 Collaboration requires a super-Planckian field variation of the inflaton in the single-field inflationary scenario. The re…
Natural inflation with multiple sub-Planckian axions
Kiwoon Choi, Hyungjin Kim, Seokhoon Yun
We extend the Kim-Nilles-Peloso (KNP) alignment mechanism for natural inflation to models with axions, which obtains a super-Planckian effective axion decay constant $f_{\tex…
String theoretic QCD axions in the light of PLANCK and BICEP2
Kiwoon Choi, Kwang Sik Jeong, Min-Seok Seo
The QCD axion solving the strong CP problem may originate from antisymmetric tensor gauge fields in compactified string theory, with a decay constant around the GUT scale. Such pos…
Sparticle Spectrum of Large Volume Compactification
Kiwoon Choi, Hans Peter Nilles, Chang Sub Shin +1
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…
Gauge Threshold Corrections in Warped Geometry
Kiwoon Choi, Ian-Woo Kim, Chang Sub Shin
We discuss the Kaluza-Klein threshold correction to low energy gauge couplings in theories with warped extra-dimension, which might be crucial for the gauge coupling unification wh…
SUSY Breaking at the Tip of Throat and Mirage Mediation
Kiwoon Choi
We discuss some features of supersymmetry breaking induced by a brane-localized source which is stabilized at the IR end of warped throat, and also the resulting mirage mediation p…
String theoretic QCD axion with stabilized saxion and the pattern of supersymmetry breaking
Kiwoon Choi, Kwang Sik Jeong
String theoretic axion is a prime candidate for the QCD axion solving the strong CP problem. For a successful realization of the QCD axion in string theory, one needs to stabilize…
Dynamical gauge coupling unification from moduli stabilization
Kiwoon Choi
In D-brane models, different part of the 4-dimensional gauge group might originate from D-branes wrapping different cycles in the internal space, and then the standard model gauge…
Supersymmetry Breaking and Moduli Stabilization with Anomalous U(1) Gauge Symmetry
Kiwoon Choi, Kwang Sik Jeong
We examine the effects of anomalous U(1)_A gauge symmetry on soft supersymmetry breaking terms while incorporating the stabilization of the modulus-axion multiplet responsible for…
Soft Supersymmetry Breaking in KKLT Flux Compactification
Kiwoon Choi, Adam Falkowski, Hans Peter Nilles +1
We examine the structure of soft supersymmetry breaking terms in KKLT models of flux compactification with low energy supersymmetry. Moduli are stabilized by fluxes and nonperturba…
Stability of flux compactifications and the pattern of supersymmetry breaking
K. Choi, A. Falkowski, H. P. Nilles +2
We extend the KKLT approach to moduli stabilization by including the dilaton and the complex structure moduli into the effective supergravity theory. Decoupling of the dilaton is n…
Fayet-Iliopoulos Terms in 5D Orbifold Supergravity
Hiroyuki Abe, Kiwoon Choi, Ian-Woo Kim
We discuss a locally supersymmetric formulation for the boundary Fayet-Iliopoulos (FI) terms in 5-dimensional U(1) gauge theory on , using the four-form multiplier mechani…
One-loop Gauge Couplings in Orbifold Field Theories
Kiwoon Choi, Ian-Woo Kim
We discuss the gauge coupling renormalization in orbifold field theories in which the 4-dimensional graviton and/or matter fields are quasi-localized in extra dimension to generate…
Softness of Brane-localized Supersymmetry Breaking on Orbifolds
Ki-Young Choi, Hyun Min Lee
We consider the brane-localized supersymmetry breaking in 5D compactified on . In case of a bulk gaugino with arbitrary brane masses for its even and odd modes, we find th…
One loop gauge couplings in AdS5
Kiwoon Choi, Ian-Woo Kim
We calculate the full 1-loop corrections to the low energy coupling of bulk gauge boson in a slice of AdS5 which are induced by generic 5-dimensional scalar, Dirac fermion, and vec…
Moduli Stabilization in Heterotic -theory
Kiwoon Choi, Hang Bae Kim, Hyungdo Kim
We examine the stabilization of the two typical moduli, the length of the eleventh segment and the volume of the internal six manifold, in compactified heterotic -theory…
Four-Dimensional Effective Supergravity and Soft Terms in M-Theory
Kiwoon Choi, Hang Bae Kim, Carlos Munoz
We provide a simple macroscopic analysis of the four-dimensional effective supergravity of the Hořava-Witten M-theory which is expanded in powers of and $κ^{2/3}…
Axions and the Strong CP Problem in M-theory
Kiwoon Choi
We examine the possibility that the strong CP problem is solved by string-theoretic axions in strong-coupling limit of the E_8 x E_8 heterotic string theory (M-theory). We first di…