4.3k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Seoul National UniversityKR1.2k papers
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- Centre National de la Recherche ScientifiqueFR1.1k papers
- Sungkyunkwan UniversityKR1.1k papers
- Wayne State UniversityUS990 papers
- Korea UniversityKR986 papers
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- University of Science and Technology of ChinaCN930 papers
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37 papers · 1 filter
A new approximation scheme in quantum mechanics
Sang Koo You, Kwang Joe Jeon, Chul Koo Kim +1
An approximation method which combines the perturbation theory with the variational calculation is constructed for quantum mechanical problems. Using the anharmonic oscillator and…
Measurement of using Partila Reconstruction of
CLEO Collaboration, M. Artuso et al
We present a measurement of the absolute branching fraction for using the reconstruction of the decay chain , wh…
Has the general two-Higgs-doublet model unnatural FCNC suppression? An RGE analysis
G. Cvetic, S. S. Hwang, C. S. Kim
There is a widespread belief that the general two-Higgs-doublet model (G2HDM) behaves unnaturally with respect to evolution of the flavor-changing neutral Yukawa coupling parameter…
Observation of the Radiative Decay
CLEO Collaboration, J. Bartelt et al
We have observed a signal for the decay D*+ -> D+ gamma at a significance of 4 standard deviations. From the measured branching ratio B(D*+ -> D+ gamma)/B(D*+ -> D+ pi0)=0.055 +- 0…
A New Mechanism for in Perturbative QCD
Dongsheng Du, C. S. Kim, Yadong Yang
We present a new mechanism for , and analyze it strictly within perturbative QCD. We find that such a new mechanism may dominate non-leptonic -decays to l…
Implications of the recent CERN LEP data on nonuniversal interactions with the precision electroweak tests
Kang Young Lee
We explore the nonuniversal interaction effects in terms of the precision variables epsilons with the recent LEP data reported by the Electroweak Working Group. The epsilon variabl…
Flavor-Specific Inclusive B Decays to Charm
CLEO Collaboration, T. E. Coan et al
We have measured the branching fractions for B -> D_bar X, B -> D X, and B -> D_bar X \ell^+ ν, where ``B'' is an average over B^0 and B^+, ``D'' is a sum over D^0 and D^+, and``D_…
Sign convention of residues in QCD sum rules
Seungho Choe
We show that signs of pole residues for octet baryons are identical in the QCD sum rule approach. To do this we compare signs of meson-baryon cou…
A Comparison of the Intrinsic Shapes of Two Different Types of Dwarf Galaxies: Blues Compact Dwarfs and Dwarf Ellipticals
Eon-Chang Sung, Cheongho Han, Barbara +3
We measure the apparent shapes for a sample of 62 blue compact dwarf galaxies (BCDs), and compare them with the apparent shapes for a sample of 80 dwarf elliptical galaxies (dEs).…
The O(N) Nonlinear Sigma Model in the Functional Schrödinger Picture
Dae Kwan Kim, Chul Koo Kim
We present a functional Schrödinger picture formalism of the (1+1)-dimensional nonlinear sigma model. The energy density has been calculated to two-loop order using the wav…
Four-quark Operators Relevant to B Meson Lifetimes from QCD Sum Rules
M. S. Baek, Jungil Lee, Chun Liu +1
At the order of 1/m_b^3, the B meson lifetimes are controlled by the hadronic matrix elements of some four-quark operators. The nonfactorizable magnitudes of these four-quark opera…
Search for Color-Suppressed Hadronic Decay Processes with CLEO
CLEO Collaboration, B. Nemati et al
Using 3.1 fb of data accumulated at the (4S) by the CLEO-II detector, corresponding to 3.3 million pairs, we have searched for the color-suppressed hadroni…
Variational Approach to Quantum Field Theory: Gaussian Approximation and the Perturbative Expansion around It
Jae Hyung Yee
The functional Schrodinger picture formulation of quantum field theory and the variational Gaussian approximation method based on the formulation are briefly reviewed. After presen…
Perturbative Expansion around the Gaussian Effective Action: The Background Field Method
Geon Hyoung Lee, Jae Hyung Yee
We develop a systematic method of the perturbative expansion around the Gaussian effective action based on the background field method. We show, by applying the method to the quant…
A Few Notes on Non-perturbative Parameters in Heavy Quark Expansion
Chao-shang Huang, C. S. Kim
Non-perturbative parameters to the order in HQET expansion, , and , as well as the masses, and , are estimated phenomenolo…
Using B_s^0 Decays to Determine the CP Angles αand γ
C. S. Kim, D. London, T. Yoshikawa
Dighe, Gronau and Rosner have shown that, by assuming SU(3) flavor symmetry and first-order SU(3) breaking, it is possible to extract the CP angles αand γfrom measurements of the d…
B->Xq l+ l- (q=d,s) and Determination of |Vtd/Vts|
C. S. Kim, T. Morozumi, A. I. Sanda
We propose a new method to extract |Vtd/Vts| from the ratio of the decay distributions dR/ds = dB(B->Xdl+l-)/ds/dB(B->Xsl+l-)/ds. This ratio depends only on the KM ratio |Vtd/Vts|…
Search for the Decay
CLEO Collaboration, K. Edwards et al
We have searched for the decay of the tau lepton into seven charged particles and zero or one pi0. The data used in the search were collected with the CLEO II detector at the Corne…
Study of the Decay tau^- \to 2pi^- pi^+ 3pi^0 nu_{tau}$
CLEO Collaboration, S. Anderson et al
The decay tau- -> 2pi- pi+ 3pi0 nu_tau has been studied with the CLEO II detector at the Cornell Electron Storage Ring (CESR). The branching fraction is measured to be (2.85 +/- 0.…
Flavor democracy and quark mass matrices
C. S. Kim, G. Cvetic
Based on experimental mass hierarchy, a set of flavor-democratic (FD) quark mass matrices at low energies is discussed. The model predicts CP violation parameters $J_{CP}=(0.3 \pm…
One-loop renormalization group equations of the general framework with two Higgs doublets
G. Cvetic, C. S. Kim, S. S. Hwang
We derive one-loop renormalization group equations (RGE's) for Yukawa coupling parameters of quarks and for the vacuum expectation values of the Higgs doublets in a general framewo…
High Energy FCNC search through Colliders
Seong-Youl Choi, C. S. Kim, Youngjoon Kwon +1
We study the potential impacts of a new type of particle collider -- an collider -- on the search for new physics beyond the Standard Model. As our first attempt for exploring…
Moduli Space Dynamics of a First-Order Vortex System
Dongsu Bak, Hyuk-jae Lee
The moduli space dynamics of vortices in the Jackiw-Pi model where a non-relativistic Schrodinger field couples minimally to Chern-Simons gauge field, is considered. It is shown th…
Determination of Vtd/Vts within the Standard Model
C. S. Kim, T. Morozumi, A. I. Sanda
We propose a new method to extract the value of |Vtd/Vts| from the ratio of the decay distributions dBr/ds[B->Xd l^+ l^-}] and dBr/ds[B Xs l^+ l^-].