Prof.
Chaehyun Yu
(KIAS)
20/02/2012, 09:00
Prof.
M. Tanimoto
(Niigata U.)
20/02/2012, 09:40
The non-zero and sizable value of $U_{e3}$ puts pressure on flavor symmetry models which predict an initially vanishing value. Hence, the tradition of relating fermion mixing matrix elements with fermion mass ratios might need to be resurrected. The recently observed non-vanishing value of $U_{e3}$ can be related numerically to the ratio of solar and atmospheric mass-squared differences. We...
Prof.
Kingman Cheung
(National Taiwan U.)
20/02/2012, 10:40
Prof.
Cai-Dian Lu
(IHEP)
20/02/2012, 11:20
Prof.
Jiunn-Wei Chen
(National Taiwan U.)
20/02/2012, 12:00
We calculate the leading order bulk viscosity \zeta of a
gluon plasma in perturbative QCD with the finite angle non-collinear
inelastic scatterings neglected by the previous calculation of Arnold,
Dogan and Moore (ADM) included. We agree with the ADM's leading order
result within errors. In contrast, our previous result on shear
viscosity \eta is smaller than that of Arnold, Moore and...
Dr
Masaya Iwabuchi
(Yonsei U.)
20/02/2012, 19:00
Dalitz plot analysis of B->DK, D->Ksh+h- (h= K or pi) is one of the promissing methods for the precise measurement of CKM angle phi3. We report a study of Dalitz plot analysis of the neutral D meson decay to KsK+K- final state. This study is based on a large data sample accumulated with the Belle detector at the KEKB e+e- collider.
Prof.
Hyun Seok Yang
(CQUeST, Sogang Univ.)
20/02/2012, 19:00
We will show how cosmic inflation can be generated by conformal Hamiltonian system in emergent gravity. We will also discuss a background independent completion of the spacetime generation through the cosmic inflation.
Prof.
Jianxiong Wang
(IHEP)
20/02/2012, 19:00
Ms
Youngsoo Sohn
(Yonsei U.)
20/02/2012, 19:20
Lepton-Flavor-Violating B decays B --> l+ tau- (l = e, mu) are forbidden in the Standard Model(SM), but they are predicted to occur in many theories beyond SM. Observation of these decays would be clear evidence of physics beyond SM. We present a study of signal and background suppression using Neural Network method and expected upper limit in ...
Dr
Li Run-Hui
(Yonsei Univ.)
20/02/2012, 19:20
We analyze the $B\to K_2^*(\to K\pi)l^+l^-$ (with $l=e,\mu,\tau$) decay in the standard model and two new physics scenarios: vector-like quark model and family non-universal $Z'$ model. We derive its differential angular distributions, using the recently calculated form factors in the perturbative QCD approach. Branching ratios, polarizations, forward-backward asymmetries and transversity...
Dr
Arman Shafieloo
(IEU, Ewha W. Univ.)
20/02/2012, 19:30
Nature of dark energy is one of the biggest unknowns of the modern cosmology. I will summarizes general attempts to reconstruct the expansion history of the universe and to probe the nature of dark energy. Reconstruction methods can be broadly classified into parametric and non-parametric approaches. Presenting the analysis of the most recent cosmological data, some pitfalls of each approach...
Dr
Fanrong Xu
(National Taiwan U.)
20/02/2012, 19:40
We show that simultaneout precision measurements of the CP-violating phase in time-dependent B_{s} --> J/ψφ study and the B_{s} --> μ+μ- rate, together with measuring m_{t`} by direct search at the LHC, would determine V_{t`b}V*_{t`s} and therefore the quadrangle in the four-generation standard model. The forward-backward asymmetry in B --> K*μ+μ- provides further discrimination.
Dr
Jae-hyeon Park
(IKTP, TU Dresden)
20/02/2012, 20:00
Due to the smallness of the lepton Yukawa couplings, higher-dimensional operators can give a significant contribution to the lepton masses. In this case, the lepton mass matrix and the matrix of lepton-Higgs couplings are misaligned leading to lepton flavor violation (LFV) mediated by the Standard Model Higgs boson. We derive model-independent bounds on the Higgs flavor violating couplings...
Kei Yamamoto
(Niigata Univ.)
20/02/2012, 20:40
The like-sign dimuon charge asymmetry observed by the D$\O$ Collaboration indicates the CP violating contribution from new physics in the $B_s$ meson mixing. Recently, the LHCb reported the observed CP-violating asymmetry in $B_s^0\to J/\psi \phi$ and $B_s^0\to J/\psi f_0(980) $, which is consistent with the SM prediction. However, there is still possible contribution on the CP violating new...
Dr
Jaehoon Jeong
(Yonsei Univ.)
20/02/2012, 20:50
We construct the gravity background which describes the dual field theory with aging invariance. We choose the decay modes of the bulk scalar field in the internal spectator direction to obtain the dissipative behavior of the boundary correlation functions of the dual scalar fields. In particular, the two-time correlation function at zero temperature has the characteristic features of the...
Dr
Gaber Faisel
(National Central U.)
20/02/2012, 21:20
We discuss the dynamical mass generation resulting from
supersymmetric extensions of the classical Nambu-Jona-Lasinio model namely from
interaction terms with four chiral superfields. The kind of interactions maybe considered a supersymmetric generalization of the four-fermion interactions of the classic Nambu-Jona-Lasinio model. We illustrate the dynamical generation of superfield...
Prof.
Kyung Kwang Joo
(Chonnam National U.)
21/02/2012, 09:00
Prof.
Eunil Won
(Korea Univ.)
21/02/2012, 09:45
Belle-II experiment is a future planned experiment for a super B-meson factory collider to be built in KEK, Japan. I review present status and prospect of the Belle-II experiment.
Eunil Won
(Korea University)
21/02/2012, 10:10
Ever since the discovery of cosmic microwave background (CMB),
the field of experimental cosmology is probing the earliest period
of the universe. I discuss briefly importance of the polarization
of CMB and discuss recent R&D for the measurement of B-mode
CMB polarization.
Prof.
Intae Yu
(Sungkyunkwan U.)
21/02/2012, 10:50
The CDF and D0 experiments finished their 10-year Run 2 operation successfully on Sep. 30, 2011. The Tevatron delivered about 12 fb-1 of collision data to each experiment during Run 2 and many important measurements and discoveries had been made by analyzing the data. In this talk, some of latest physics results from the Tevatron experiments will be reviewed and discussed.
Prof.
Donghee Kim
(Kyungpook National U.)
21/02/2012, 11:35
The LHC delivered more than 5 /fb data and the CMS collected the data about 5.2 /fb with near 90% efficiency. The most of major physics channels has been already finished resulting in submission of papers. We show the recent results on new particle searches at CMS based on 2011 data. These include Higgs, heavy gauge boson, ED as well as SUSY particles. FInally the prospect of 2012 will be discussed.
Prof.
Hsiang-nan Li
(Academia Sinica)
21/02/2012, 19:00
We include the $\eta_c$ meson into the $\eta$-$\eta'$-$G$ mixing
formalism constructed in our previous work, where $G$ represents the
pseudoscalar gluball. The mixing angles in this tetramixing
matrix are constrained by theoretical and experimental implications
from relevant hadronic processes. Especially, the angle between
$\eta_c$ and $G$ is found to be about $15^\circ$ from the...
Prof.
Youngjoon Kwon
(Yonsei Univ.)
21/02/2012, 19:00
B meson decays to invisible final states. e.g. B → νν are very highly suppressed in the Standard Model (SM). Similarly, B decay to semi-invisible final states such as B → K*νν are highly suppressed. As a result, these decays can provide a good probe to search for new physics beyond the SM. Experimently, it is very difficult to search for these decays due to invisibility of the final state...
Mr
Youngmin Yook
(Yonsei Univ.)
21/02/2012, 19:20
The branchig fraction of the rare B meson decay B->lnu are expected to be very small due to helicity suppression in the Standard Model. With the contributions from the new physics beyond the Standard Model, this may be avoided and the evidences of the process may be observed. With hadronic tagging method for a very clean experimental signature, this study is based on a set of data sample of...
Lu-Hsing Tsai
(National Taiwan U.)
21/02/2012, 19:25
A model relating radiative seesaw and minimal dark matter mass scales without beyond the standard model (SM) gauge symmetry (RνMDM) is constructed. In addition to the SM particles, the RνMDM contains, a Majorana fermion multiplet NR and scalar multiplet χ that transform respectively as (1, 5, 0) and (1, 6,−1/2) under the SM gauge group SU(3)C ×SU(2)L ×U(1)Y .This choice for representation of...
Mr
Dooyong Jung
(Yonsei U.)
21/02/2012, 19:45
We present the study of the leptonic B-meson decay, B → lτ from Belle experiment. This study is done by using MC sample which corresponds to an integrated luminosity of 711fb−1 , from which contains approximately 771 × 106 BB pair events. They are tagged by hadronic tagging method. We optimized all event variables cuts to obtain best result. We can get the result of Expected Branching Fraction...
Dr
Yu Seon Jeong
(Yonsei Univ.)
21/02/2012, 19:50
We evaluate the ultra high energy neutrino event rate from the lunar observation using the analytic expression of the effective aperture by Gayley et al.. We modify this formalism for strong attenuation and evaluate the background from cosmic ray interaction in the lunar regolith. We also make modifications to the effective aperture for the non-standard model neutrino interaction and calculate...
Dr
O-Kab Kwon
(Sungkyunkwan U.)
21/02/2012, 20:20
We obtain a new-type of ${\cal N}=3$ Yang-Mills Chern-Simons theory from the Mukhi-Papageorgakis Higgsing of the ${\cal N}=3$ Gaiotto-Tomasiello theory. This theory has ${\cal N}=1$ BPS fuzzy funnel solution which is expressed in terms of the seven generators of SU(3), excluding $T_8$. We propose that this is an effective theory of multiple D2-branes with D6- and D8-branes in the presence of...
Prof.
Takuya Morozumi
(Hiroshima Univ.)
21/02/2012, 20:35
We study the variation of particle number in non-equilibirum enviroment. Using the scalar model with the particle number violating interactions, we study the time development of the particle number using the Closed Path Time (CPT) formalism. Two types of the particle number interactions are considered. One is the particle number violationg mass term and the other drives particle number...
Mr
Wooje Jang
(Yonsei U.)
21/02/2012, 20:50
We explore four-dimensional Einstein-Weyl gravity and supergravity on anti-de Sitter spacetime. For a specific range of the coupling with appropriate boundary conditions, we show the effective equivalence of the theory with Einstein gravity and AdS supergravity at the quadratic Lagrangian level. Furthermore we show that these equivalences can be promoted to the full nonlinear level. We also...
Prof.
Kang Young Lee
(Konkuk Univ.)
21/02/2012, 21:00
Mr
Wooram Cho
(Yonsei U.)
21/02/2012, 21:10
At present, we don’t understand what can generate ultra high energy cosmic rays(UHECRs) exactly. Active galactic nuclei(AGN) can be regarded as one of the source of UHECRs. In this presentation, we use bayesian approach to detemine the fraction of UHECRs coming from AGNs. And 27 highest energy-events detected by Pierre Auger Observatory(PAO) with Veron Cetty Veron(VCV) catalogue are analysed.
Hsiu-Hsien Lin
(National Taiwan U.)
21/02/2012, 21:25
We study the complementarity between quark and lepton mixing angles (QLC), the sum of an angle in quark mixing and the corresponding angle in lepton mixing is π/4. Experimentally in the standard PDG parametrization, two such relations exist approximately. These QLC relations are accidental which only manifest themselves in the PDG parametrization. We propose reparametrization invariant...
Mr
Hongki Kim
(Yonsei U.)
21/02/2012, 21:30
The COREA(COsmic ray Reaserch and Education Array) collaboration has installed a prototype array of plastic scintillation systems at Kyeonggibuk Science High School and Hansung Science High School to study cosmic ray events. In each site, three detector stations are installed, where each station cosists of four scintillation detectors. We report the progress of simulation study of plastic...
Prof.
Kimyeong Lee
(KIAS)
22/02/2012, 09:40
Prof.
Soonkeon Nam
(Kyunghee U.)
22/02/2012, 10:40
Recent development in 4 Dimensional Quantum Field Theories have revealed that some of 2 Dimensional CFT techniques which have been developed last 20 some years are relevant, especially through the works of AGT. Instanton sector calculation (very difficult) can easily be done by 2D Conformal FIeld theory calculations. I wil review this connection and introduce some of my earlier works (more...
Prof.
Yunbai Kim
(Sungkyunkwan U.)
22/02/2012, 11:20
We construct the gauge invariant interaction terms between the world-volume fields of multiple M2-branes and the 3- and 6-form fields in the context of ABJM theory. with U(N)×U(N) gauge and show that the obtained dimensionally reduced couplings coincide with the effective action of D2-branes coupled to R-R 3- and 5-form fields in type IIA string theory. As an application of our formulation, we...
Ardy Mustofa
(Yonsei Univ.)
22/02/2012, 17:00
We investigate the vector-like fourth generation coming from Split-UED to the contribution of the Higgs physics. We calculate the cross section from one-loop induced $gg->H$ process, and the branching ratio from $H->gg$ and $H->\gamma \gamma$ processes. The work now is still in progress.
Dr
Sangsu Ryu
(KISTI), Dr
Soonwook Hwang
(KISTI)
22/02/2012, 17:00
The ALICE experiment, one of the four LHC experiments at CERN, is about studying the physics of strongly interacting matter at extreme energy densities, where the formation of a new phase of matter, the quark-gluon plasma, is expected. Several petabytes of data are expected to be produced from the ALICE detector annually. There are more than 1000 ALICE scientists around the world who want to...
Freddy Simanjuntak
(Yonsei University)
22/02/2012, 17:00
The B --> V T (V and T denote vector and tensor mesons respectively) decays, whose final-state particles can have transverse or longitudinal polarization, are investigated in perturbative QCD (pQCD) approach. Measurements have been made of B --> phi K_2^*, and it is found that f_T / f_L is small, whereas f_T / f_L ~ 1 for B --> omega K_2^* where f_T(f_L) is the fraction of transverse...
Thi Thuy Nguyen
(Yonsei Univ.)
22/02/2012, 17:00
In the 3-3-1 model with right-handed neutrinos, small neutrino masses can be obtained by introducing a Higgs sextet. The neutrino mass is the result of a type II seesaw mechanism. In addition to the ordinary heavy right-handed neutrinos, there exits the scalar sextet coupled to leptons. We study the contributions of the right-handed neutrinos and the sextet to the lepton asymmetry.
Dr
Jeonghoon Moon
(KISTI)
22/02/2012, 17:00
In this paper, we shows research works of the NRM (Network Resource Management) system for efficient transmission of large-scale of data for HEP (High Energy Physics) as a user requirement based in international advanced scientific and technology research network and also announce the demonstrated about them.
Each national research network of each countries consisting of 40 Giga network...
Prof.
Kihyeon Cho
(KISTI), Dr
Soohyeon Nam
(KISTI)
22/02/2012, 17:00
The current measurements of CP asymmetries in B -> K pi decays are in disagreement with the predictions of the Standard Model. In order to solve this discrepancy, using the effective Hamiltonian approach, we investigate the right-handed current contributions to B -> K pi decay amplitudes including all possible low-energy operators in the nonmanifest left-right model. We find the allowed region...
Prof.
Steven Olsen
(Seoul National U.)
23/02/2012, 09:00
BESIII is a new, state-of-the-art 4π detector at the recently upgraded BEPCII two-ring e+e- collider at the Institute for High Energy Physics in Beijing. The detector has been in operation for nearly three years, during which time it collected the world’s largest data samples of J/ψ, ψ’ and ψ(3770) decays. These data are being used to make interesting and unique studies of light-hadron...
Prof.
Pyungwon Ko
(KIAS)
23/02/2012, 10:50
I present some ideas on Higgs boson and cold dark matter,
and the interplay between the two different subjects.
Prof.
Bum-Hoon Lee
(CQUeST, Sogang U.)
23/02/2012, 11:35
