Invisible Higgs decay with $B\to K\nu\bar{\nu}$ constraint (2009)
Kim, C. S., Park, Seong Chan, Wang, Kai, Zhu, Guohuai
Precision measurement of Higgs property will play an important role to study electroweak symmetry breaking as well as possible new physics. In this paper, we study the invisible decay mode of Higgs...
Dark Matter and Collider Physics in Split-UED (2009)
Kaluza-Klein dark matter is an attractive weakly interacting massive particle in universal extra dimension model. In the recent extension "split-UED", annihilation of Kaluza-Klein dark matter with a...
Neutrino mass from a hidden world and its phenomenological implications (2009)
Park, Seong Chan, Wang, Kai, Yanagida, Tsutomu T.
We propose a model of neutrino mass generation in extra dimension. Allowing a large lepton number violation on a distant brane spatially separated from the standard model brane, a small neutrino mass...
Kaluza-Klein Dark Matter After Fermi (2009)
Chen, Chuan-Ren, Nojiri, Mihoko M., Park, Seong Chan, Shu, Jing
Kaluza-Klein photon in universal extra dimension models is one of the most attractive dark matter candidates as a weakly interacting massive particle. Having a characteristic split spectrum in split...
Split-UED and Dark Matter (2009)
Motivated by the recent observation of the high energy electron and positron excesses in cosmic ray by PAMELA and ATIC/PPB-BETS, we suggest an anomaly-free scenario for the universal extra dimension...
A class of inflation models with non-minimal coupling (2008)
We show that the potential of the scalar field in the Einstein frame is flat if the nonminimal coupling term is properly chosen that it satisfies the condition (V(phi)/K^2(phi)-> constant) as phi...
Inflation in the nonminimal theory with `K(phi)R' term (2008)
A class of inflationary models with the nonminimal coupling term `K(phi)R' is considered. We show that the successful inflation can take place if the ratio between the square of the nonminimal...
Black Holes at the LHC: Progress since 2002 (2008)
We review the recent noticeable progresses in black hole physics focusing on the up-coming super-collider, the LHC. We discuss the classical formation of black holes by particle collision, the...
511 keV $\gamma$-ray emission from the galactic bulge by MeV millicharged dark matter (2008)
Huh, Ji-Haeng, Kim, Jihn E., Park, Jong-Chul, Park, Seong Chan
We propose a possible explanation for the recently observed anomalous 511 keV line with a new "millicharged" fermion. This new fermion is light [${\cal O}({\rm MeV})$]. Nevertheless, it has never...
Inflation by non-minimal coupling (2008)
Park, Seong Chan, Yamaguchi, Satoshi
Inflationary scenarios based on simple non-minimal coupling and its generalizations are studied. Generalizing the form of non-minimal coupling to "K(phi)R" with an arbitrary function K(phi), we show...
Minimal gauge inflation (2008)
Gong, Jinn-Ouk, Park, Seong Chan
We consider a gauge inflation model in the simplest orbifold M4 x S1/Z2 with the minimal non-Abelian SU(2) hidden sector gauge symmetry. The inflaton potential is fully radiatively generated solely...
Galactic 511 keV line from MeV millicharged dark matter (2007)
Huh, Ji-Haeng, Kim, Jihn E., Park, Jong-Chul, Park, Seong Chan
We present a possible explanation of the recently observed 511 keV $\gamma$-ray anomaly with a new ``millicharged'' fermion. The new fermion is light (${\cal O}({\rm MeV})$) but has never been...
We consider a scenario of cosmological inflation coming from a grand unified theory in higher dimensional orbifold. Flatness of the potential is automatically guaranteed in this orbifold setup thanks...
Black Hole's Life at colliders (2007)
In the series of papers by Ida, Oda and Park, the complete description of Hawking radiation to the brane localized Standard Model fields from mini black holes in the low energy gravity scenarios are...
Phenomenology of Top Partners at the ILC (2007)
Kong, Kyoungchul, Park, Seong Chan
The assumption of a new symmetry provides a nice explanation of the existence of dark matter and an elegant way to avoid the electroweak constraints. This symmetry often requires the pair production...
Rotating Black Holes at Future Colliders. III. Determination of Black Hole Evolution (2006)
Ida, Daisuke, Oda, Kin-ya, Park, Seong Chan
TeV scale gravity scenario predicts that the black hole production dominates over all other interactions above the scale and that the Large Hadron Collider will be a black hole factory. Such higher...
Fully Radiative Electroweak Symmetry Breaking (2005)
Cacciapaglia, Giacomo, Csaki, Csaba, Park, Seong Chan
Models of Gauge-Higgs unification in extra dimensions offer a very elegant playground where one can study electroweak symmetry breaking. The nicest feature is that gauge symmetry itself protects the...
Rotating black holes at future colliders II: Anisotropic scalar field emission (2005)
Ida, Daisuke, Oda, Kin-ya, Park, Seong Chan
This is the sequel to the first paper of the series, where we have discussed the Hawking radiation from five-dimensional rotating black holes for spin 0, 1/2 and 1 brane fields in the low frequency...
Kaluza-Klein masses of bulk fields with general boundary conditions in AdS$_5$ (2005)
Chang, Sanghyeon, Park, Seong Chan, Song, Jeonghyeon
Recently bulk Randall-Sundrum theories with the gauge group $SU(2)_L \times SU(2)_R \times U(1)_{B-L}$ have drawn a lot of interest as an alternative to electroweak symmetry breaking mechanism. These...
Anisotropic scalar field emission from TeV scale black hole (2005)
Ida, Daisuke, Oda, Kin-ya, Park, Seong Chan
Black holes are predicted to be copiously produced at the CERN Large Hadron Collider in the scenarios of TeV scale gravity. We report recent progress in studying decay of such a higher dimensional...
Neutrino Mass from R-parity Violation in Split Supersymmetry (2004)
Chun, Eung Jin, Park, Seong Chan
We investigate how the observed neutrino data can be accommodated by R-parity violation in Split Supersymmetry. The atmospheric neutrino mass and mixing are explained by the bilinear parameters...
Rotating Black Holes at Future Colliders (2003)
Ida, Daisuke, Oda, Kin-ya, Park, Seong Chan
We consider the production and decay of TeV-scale black holes. Evaluation of the production cross section of higher dimensional rotating black holes is made. The master field equation for general...
Rotating Black Holes/Rings at Future Colliders (2003)
Ida, Daisuke, Oda, Kin-ya, Park, Seong Chan
The hierarchy between the electroweak and Planck scales can be reduced when the extra dimensions are compactified with large volume or with warped geometry, resulting in the fundamental scale of the...
Black Holes at future colliders (2003)
Ida, Daisuke, Oda, Kin-ya, Park, Seong Chan
We consider the production and decay of TeV sized black holes. After discussing evaluation of the production cross section of higher dimensional rotating black holes and black rings, the master...
Muon anomalous magnetic moment and the heavy photon in a little Higgs model (2003)
Park, Seong Chan, Song, Jeonghyeon
In the Littlest Higgs model, we comprehensively study the phenomenology of the heavy photon A_H which is lightest, in most of the parameter space, among newly introduced heavy gauge bosons and...
Testing Higgs Triplet Model and Neutrino Mass Patterns (2003)
Chun, Eung Jin, Lee, Kang Young, Park, Seong Chan
The observed neutrino oscillation data might be explained by new physics at a TeV scale, which is testable in the future experiments. Among various possibilities, the low-energy Higgs triplet model...
Rotating black holes at future colliders: Greybody factors for brane fields (2002)
Ida, Daisuke, Oda, Kin-ya, Park, Seong Chan
We study theoretical aspects of the rotating black hole production and evaporation in the extra dimension scenarios with TeV scale gravity, within the mass range in which the higher dimensional Kerr...
Kaluza-Klein gravitino production with a single photon at e^+ e^- colliders (2002)
Baek, Seungwon, Park, Seong Chan, Song, Jeonghyeon
In a supersymmetric large extra dimension scenario, the production of Kaluza-Klein gravitinos accompanied by a photino at e^+ e^- colliders is studied. We assume that a bulk supersymmetry is softly...
Production of Spinning Black Holes at colliders (2001)
When the Planck scale is as low as TeV scale, there will be chances to produce Black holes (BH's) at future colliders. Generally, BH's produced via pariticle collisions could have non-zero angular...
Implication of Brane fluctuations to indirect collider signals (2001)
Park, Seong Chan, Song, Hee Sung
We study the effect of brane fluctuation on the indirect signals of high energy colliders. Brane fluctuation could act as a regulator of divergent expression of infinite tower of Kaluza-Klein...
Brane Fluctuation and anomalous muon magnetic moment (2001)
Park, Seong Chan, ~Song, H. S.
We study the effects of extra dimensions on the muon anomalous magnetic moment with brane fluctuation. Since the coupling is naturally suppressed if brane fluctuation is considered by exponential...
Lee, Kang Young, Song, JeongHyeon, Park, Seong Chan, Song, H. S., Yu, Chaehyun
We explore signatures of large extra dimensions with a polarized electron/positrn beam at the Joint Linear Collider (JLC). We point out that spin informations can be useful to study indirect signals...
Z boson pair production at LHC in a stabilized Randall-Sundrum scenario (2001)
Park, Seong Chan, Song, H. S., Song, Jeonghyeon
We study the Z boson pair production at LHC in the Randall-Sundrum scenario with the Goldberger-Wise stabilization mechanism. It is shown that comprehensive account of the Kaluza-Klein graviton and...
Muon anomalous magnetic moment and the stabilized Randall-Sundrum scenario (2001)
We study the effects of extra dimension on the muon anomalous magnetic moment in the stabilized Randall-Sundrum scenario. The effects of the Kaluza-Klein states heavier than the cut-off scale...
Choi, S. Y., Park, Seong Chan, Jang, J. H., Song, H. S.
We study the elastic scattering of the lightest neutralino with a nucleus in the framework of the minimal supersymmetric standard model (MSSM) with explicit flavor preserving CP violation, including...
Lee, Kang Young, Park, Seong Chan, Song, H. S., Yu, Chaehyun
We explore the effects of extra neutral gauge boson involved in the supersymmetric E6 model on the spin configuration of the top quark pair produced at the polarized e- e+ collider. Generic mixing...
Enhancement of epsilon'/epsilon in the SU(2)_L times SU(2)_R times U(1) model (2000)
Jang, Ji-ho, Lee, Kang Young, Park, Seong Chan, Song, H. S.
We explore the possible enhancement of direct CP violating parameter epsilon'/epsilon in the general left-right model based on the SU(2)_L times SU(2)_R times U(1) gauge group. The mixing matrix of...
Radion effects on the production of an intermediate-mass scalar and Z at LEP II (2000)
Park, Seong Chan, Song, H. S., Song, Jeonghyeon
We have studied the $e^+ e^- \to Z \phi_i \to Z jj$ process, where $\phi_i$ is the Higgs and/or radion bosons. The implications of the radion effects on the preliminary ALEPH data are also discussed....
Lee, Kang Young, Park, Seong Chan, Song, H. S., Song, Jeonhyeon, Yu, Chaehyun
Top quark pair production at photon-photon colliders is studied in low scale quantum gravity scenario. From the dependence of the cross sections on the spin configuration of the top quark and...