Yonsei University

output

19932026

most citedFirst M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole

4.3k citations

researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

collaborating institutions

Showing 1998Show all

44 papers · 1 filter

nucl-th1998★ 116 cited

J/psi and eta_c in the nuclear medium: QCD sum rule approach

Frank Klingl, Sungsik Kim, Su Houng Lee +2

We investigate the masses of the lowest c\bar{c} states, the J/psi and eta_c, in nuclear matter using QCD sum rules. Up to dimension four, the differences between the operator prod…

hep-ph1998★ 26 cited

Heavy Majorana neutrinos in e+e- colliders

G. Cvetic, C. S. Kim, C. W. Kim

We investigate possibilities for detecting heavy Majorana neutrinos ( $N$ 's) in $e^{+} e^{-}$ at LEP200 and future Linear Colliders. We concentrate on the processes where the pairs of in…

hep-ph1998★ 52 cited

Bi-maximal Lepton Flavor Mixing Matrix and Neutrino Oscillation

Sin Kyu Kang, C. S. Kim

Recently, many authors showed that if the solar and atmospheric neutrino data are both described by maximal mixing vacuum oscillations at the relevant mass scale, then there exists…

hep-ex1998★ 48 cited

Measurement of the $B \to D ℓ ν$ Branching Fractions and Form Factor

J. Bartelt

Using a sample of 3.3 million B-meson decays collected with the CLEO detector at the Cornell Electron Storage Ring, we have studied $B^{-} \to D^{0} ℓ ν$ and $\bar{B}^0 \to D^+ \ellν…

hep-ex1998★ 22 cited

Search for Exclusive Rare Baryonic Decays of $B$ Mesons

T. E. Coan

We report the results of a search for the rare baryonic decay modes B -> Lambda Lambdabar, B -> Lambdabar p, B -> Lambdabar p pi, and B -> p pbar using 5.8M BBbar pairs collected w…

hep-ph1998★ 8 cited

CP Violation in the Semileptonic $B_{l 4}$ ( $B - > D π l ν$ ) Decays: Multi-Higgs Doublet Model and Scalar-Leptoquark Models

C. S. Kim, Jake Lee, W. Namgung

CP violation from physics beyond the Standard Model is investigated in $B_{l 4}$ decays: $B \to D π l ν ˉ_{l}$ . In the decay process, we include various excited states as intermediate s…

hep-ph1998★ 6 cited

CP Violation in the Semileptonic $B_{l 4}$ (B->D πl ν) Decays: A Model Independent Analysis

C. S. Kim, Jake Lee, W. Namgung

CP violation from physics beyond the Standard Model is investigated in $B_{l 4}$ decays: $B \to D π l ν ˉ_{l}$ . The semileptonic $B$ -meson decay to a $D$ -meson with an emission of singl…

hep-ex1998★ 11 cited

First Observation of the Decay $B^{0} \to D^{+} D^{-}$

M. Artuso

We have observed four fully reconstructed B0 -> D*+D*- candidates in 5.8 million Upsilon(4S) -> BBbar decays recorded with the CLEO detector. The background is estimated to be 0.31…

nucl-th1998

Radiative Muon Capture and Induced Pseudoscalar Coupling Constant in Nuclear Matter

Myung Ki Cheoun, K. S. Kim, B. S. Han +1

The recent TRIUMF experiment for $μ^{-} p \to n ν_{μ} γ$ gave a surprising result that the induced pseudoscalar coupling constant $g_{P}$ was larger than the value obtained from $μ^- p \…

nucl-th1998★ 1 cited

Induced Pseudoscalar Coupling Constant

Il-Tong Cheon, Myung Ki Cheoun

The recent TRIUMF experiment for $μ^{-} p \to n ν_{μ} γ$ gave a surprising result that the induced pseudoscalar coupling constant $g_{P}$ was larger than the value obtained from $μ^- p \…

nucl-th1998

The Axial Current in Electromagnetic Interaction

Myung Ki Cheoun, K. S. Kim, Il-Tong Cheon

We discussed the possibility that the charged axial currents of matter fields could be non-conserved in electromagnetic interaction at $O (e)$ order. It means that chiral symmetry…

hep-ph1998★ 4 cited

Determination of HQET parameter λ_1 from Inclusive Semileptonic B Meson Decay Spectrum

K. K. Jeong, C. S. Kim

We estimate the heavy quark effective theory parameter λ_1 from inclusive semileptonic B-meson decay spectrum. By using recent CLEO double lepton tagging data of B -> X e nu, which…

astro-ph1998★ 20 cited

An Additional Application of the Space Interferometry Mission to Gravitational Microlensing Experiments

Cheongho Han, Tu-Whan Kim

Despite the detection of a large number of gravitational microlensing events, the nature of Galactic dark matter remains very uncertain. This uncertainty is due to two major reason…

astro-ph1998★ 97 cited

The UV Upturn in Elliptical Galaxies as an Age Indicator

Yi, Lee, Woo +2

We show that the UV flux of old stellar systems can tell us about their ages. Two independent populations synthesis groups that have had wildly different views have here worked tog…

hep-ex1998★ 18 cited

First Observation of the Decay $τ^{-} \to K^{*-} η ν_{τ}$

M. Bishai

Using data recorded by the CLEO-II detector at CESR, we report the first measurement of the branching fraction for the decay of $τ^{-}$ into $K^{*-} η ν_{τ}$ . The measured branching frac…

nucl-th1998★ 23 cited

QCD sum rule calculation of the $π N N$ coupling-revisited

Hungchong Kim, Su Houng Lee, Makoto Oka

In the conventional QCD sum rule calculation for the $π N N$ coupling beyond the soft-pion limit, there are three distinct Dirac structures, each of which can be used to construct se…

hep-ph1998★ 19 cited

Neutrino Oscillations and Lepton Flavor Mixing

Kyungsik Kang, Sin Kyu Kang, C. S. Kim +1

In view of the recent announcement on non-zero neutrino mass from Super-Kamiokande experiment, it would be very timely to investigate all the possible scenarios on masses and mixin…

cond-mat1998

Fractional Populations in Sex-linked Inheritance

Seung Pyo Lee, Myung-Hoon Chung, Chul Koo Kim +1

We study the fractional populations in chromosome inherited diseases. The governing equations for the fractional populations are found and solved in the presence of mutation and se…

hep-ph1998★ 25 cited

Signals for CP-Violation in Scalar Tau Pair Production at Muon Colliders

Seong-Youl Choi, Manuel Drees

We discuss signals for CP-violation in $μ^{+} μ^{-} \to τ ~_{i}^{-} τ ~_{j}^{+}$ , where $i, j = 1, 2$ label the two scalar $τ$ mass eigenstates. We assume that these reactions can proc…

hep-ex1998★ 11 cited

$Υ$ Dipion Transitions at Energies Near the $Υ (4 S)$

S. Glenn

Using a data sample collected with the CLEO II detector at CESR, we have searched for dipion transitions between pairs of $Υ$ resonances at energies near the $Υ (4 S)$ . We obtain upp…

hep-ph1998★ 69 cited

A Model Independent Analysis of the Rare B Decay B -> X_s l^+ l^-

S. Fukae, C. S. Kim, T. Morozumi +1

The most general model-independent analysis of the rare $B$ decay, $\Bsll$, is presented. There are ten independent local four-Fermi interactions which may contribute to this proce…

hep-ph1998★ 11 cited

CP-Violation through Scalar Tau Oscillation

Seong-Youl Choi, Manuel Drees

We point out that oscillation between the two scalar tau (stau) mass eigenstates can give rise to CP-violation if some parameters appearing in the stau or chargino/neutralino mass…

nucl-th1998★ 4 cited

Overbarrier Resonances as Solutions of Set Inhomogeneous Schrödinger Equations

Il-Tong Cheon, G. Kim, A. V. Khugaev

In the paper the Schrödinger equation for quasibound resonance state with complex energy is considered. The system of inhomogeneous differential equations is obtained for the real…

hep-ph1998★ 50 cited

Higgs-mediated flavor-changing neutral currents in the general framework with two Higgs doublets -- an RGE analysis

G. Cvetic, C. S. Kim, S. S. Hwang

We consider the standard model with two Higgs doublets with the most general Yukawa coupling terms (``type III''). In the model, the neutral-Higgs-mediated flavor-changing neutral…