| Title | Moduli stabilization and SUSY breaking in moduli-mixing racetrack model |
| Speaker | 安倍 博之氏（京大） |
| Date | ２月２１日（火曜) 15:30 |
| Comment | 060221abe.pdf(Local Only) |
| Title | Nonabelian coulomb phase in 4D N=1 SCFTs |
| Speaker | 大河内 豊氏（東大） |
| Date | １月３１日（火曜) 15:30 |
| Comment | 050131ookouchi.pdf(Local Only) |
| Title | Brane世界内部次元の構造をDefectに関連した宇宙観測で探るための試み〜PBH and DM from cosmic necklaces〜 |
| Speaker | 松田 智裕氏（埼玉工大） |
| Date | １月１７日（火曜) 15:30 |
| Comment |
| Title | TBA |
| Speaker | Dr. Norihiro Iizuka (Tata Institute) |
| Date | 10th January (Tue) 15:00 |
| Comment |
| Title | The seesaw mechanism, neutrino Yukawa couplings, LFV and leptogenesis |
| Speaker | Dr. Tetsuo SHINDOU (SISSA) |
| Date | 20 December (Tue) 15:30 |
| Comment |
| Title | Phenomenology of mixed modulus-anomaly mediation in fluxed string compactifications and brane models |
| Speaker | Dr. Ken-ich Okumura |
| Date | 13th December (Tue) 15:30 |
| Comment |
| Title | Prospect of T2K experiment with large detector in Korea |
| Speaker | Dr. Naotoshi Okamura |
| Date | 29th November (Tue) 15:30 |
| Comment | In this talk, I will show the prospect of T2K experiment with large detector in Korea. The T2K neutrino oscillation experiment, which will start in 2009, is the next generation long base-line neutrino oscillation experiment with J-PARC at Tokai village, and Super-Kamiokande at Kamioka town. In this experiment the center of the neutrino beam from J-PARC will go through underground beneath SK, reach the sea level between the Japan and Korea. An off-axis beam at 0.5 degree to 1.0 degree can be observed in east coast of south part of Korea. We study the physics impacts of putting a 100 kt-level Water Cherenkov detector in Korea during the T2K experimental period. For a combination of the 3.0 degree off-axis beam at SK with baseline length L = 295 km and the 0.5 degree off-axis beam in the east coast of Korea at L = 1000 km, we find that the neutrino mass hierarchy (the sign of the larger mass squared-difference) can be resolved and the CP phase of the MNS unitary matrix can be constrained uniquely at 3-sigma level when sin^2 2theta_rct > 0.06.osaka.1129.mht(Local Only) osaka.1129.ppt(Local Only) |
| Title | Moduli Space of Vortices |
| Speaker | Dr. Keisuke Ohashi (Tokyo Institute of Technology) |
| Date | 22nd November (Tue) 15:30 |
| Comment |
| Title | Scalar Laplacian on Sasaki-Einstein Manifold Y^{p,q} |
| Speaker | Dr. H. Kihara |
| Date | 15th November (Tue) 15:30 |
| Comment | We study the spectrum of the scalar Laplacian on the five-dimensional toric Sasaki-Einstein manifolds Y^{p,q}. The eigenvalue equation reduces to Heun's equation, which is a Fuchsian equation with four regular singularities. We show that the ground states, which are given by constant solutions of Heun's equation, are identified with BPS states corresponding to the chiral primary operators in the dual quiver gauge theories. The excited states correspond to non-trivial solutions of Heun's equation.051115seminar-kihara.pdf(Local Only) |
| Title | The sphaleron solution and energy in the Next-to-MSSM:Connecting Higgs sector with the matter-antimatter asymmetry in the Universe |
| Speaker | Shuichiro Tao (Saga University) |
| Date | 8th November (Tue) 15:30 |
| Comment |
| Title | Heterotic string field theory |
| Speaker | Dr. Yuji Okawa (MIT) |
| Date | 1st November (Tue) 15:30 |
| Comment |
| Title | UED 模型における暗黒物質及びコライダーの物理 |
| Speaker | Dr. Shigeki Matsumoto (KEK) |
| Date | 25th October (Tue) 15:30 |
| Comment | 標準理論を越える物理の模型の一つとして、UED (Universal Extra Dimension model) がある。この模型は、暗黒物質の候補を持ち、またコライダーでのシグナルが超対称標準模型のそれと酷似しているため、近年注目を集めている。今回この模型において、宇宙の暗黒物質残存量の観測からどのような制限を受けるか、また暗黒物質の検出観測においてどのようなシグナルが期待されるかについて議論する。またこれらの議論がハドロン及びレプトンコライダーを用いた実験にどのような影響があるかについても議論したい。051025matsumoto-shigeki.ppt(Local Only) |
| Title | t\bar{t} production and QCD corrections near threshold at ILC |
| Speaker | Dr. Y. Kiyo (Institute for Theoretical Physics E, RWTH Aachen) |
| Date | 21th October (Fri) 14:00 "Irregular schedule" |
| Comment |
| Title | Describing Curved Spaces by Matrices |
| Speaker | Dr. Masanori Hanada (Kyoto) |
| Date | 18th October (Tue) 15:30 |
| Comment | 051018seminar-hanada.pdf(Local Only) |
| Title | R4 Corrections to D=11 Supergravity via Supersymmetry |
| Speaker | Dr. Yoshifumi Hyakutake (KITP, UCSB) |
| Date | 11th October (Tue) 15:30 |
| Comment | 051011seminar-hyakutake.pdf(Local Only) |
| Title | AdS5 x S5 超弦理論の可積分性 |
| Speaker | Dr. Matsuo Sato (University of Rochester) |
| Date | 4th October (Tue) 15:30 |
| Comment | AdS5 x S5 超弦理論の可積分性を調べた。Bena, Polchinski, Roiban らが得たものと等価なフラットカレントのワンパラメータファミリーが一般化されたZ_4変換のもとで明白に不変であることを示した。Z_4対称性はこの理論の等長変換PSU(2,2|4)の自己同型なので一般化されたZ_4対称性はカレントの解析を単純化する。また、この理論の正準解析を行った。特に、カレントのポアソン括弧を計算した。このポアソン括弧はシュインガー項を含んだ代数をなすことが分かった。シュインガー項のためにこの系の量子可積分性を知るには更なる解析が必要である。論文：hep-th/0411200 （JHEP 0412 (2004) 055） Ashok Das, Jnanadeva Maharana, A. Melikyan, Matsuo Sato |
| Title | Three loop results for perturbative QCD in deep inelastic scattering |
| Speaker | Prof. Jos Vermaseren (NIKEF/KEK) |
| Date | 21th September (Wed) 15:30 <--- Attention !!! |
| Comment |
| Title | The effective geometry of the D1-D5 ensemble |
| Speaker | Masaki Shigemori (CalTech) |
| Date | 20th September (Tue) 15:30 |
| Comment | We compute correlation functions in the AdS/CFT correspondence to study the emergence of effective spacetime geometries describing complex underlying microstates. The basic argument is that almost all microstates of fixed charges lie close to certain 050920BH-shigemori.pdf(Local Only) |
| Title | Minimal supergravity in brane world scenario |
| Speaker | Nobuchika Okada (KEK) |
| Date | 6th September (Tue) 15:30 |
| Comment |
| Title | Integrable Spin Chain and String/Gauge Theory Duality |
| Speaker | Prof. Yong-Shi Wu (University of Utah) |
| Date | 5th Aughst (Fri) 13:30 |
| Comment | Operator mixing in D=4 Supersymmetric Yang-Mills theories provides a new way to test the duality between a gauge theory and a string theory. At least at planar one-loop level, the anomalous dimension matrix, restricted to certain sectors of gauge invariant composite operators that correspond to free (either closed or open) string states, can be identified as the Hamiltonian of an integrable (closed or open) spin chain. Then using the Bethe Ansatz for the spin chain, one can diagonalize the anomalous dimensions and test the string theory predictions for the spectrum. In this talk, we will summarize achievements of recent works along this line of thoughts for exploration of integrable structures in both gauge and string theories, paying particular attention to the open spin chains and string/gauge theory correspondence. |
| Title | The Enhancement of |
| Speaker | Kazuhiro Tobe (University of Michigan) |
| Date | 26th July (Tue) 15:30 |
| Comment |
| Title | D0/D2-brane系におけるタキオン凝縮とD0-braneの溶解 |
| Speaker | Yoshinao Sato (Tokyo university) |
| Date | 19th July (Tue) 15:30 |
| Comment | 背景磁場中のD2-brane上に置かれたD0-braneは不安定であり、D2-brane上に溶解すると考えられる。この系の開弦理論はSeiberg-Witten極限において非可換ゲージ理論により記述され、D0-braneの溶解は不安定なゲージ場のソリトン解として記述される。D0-braneの溶解過程はnon-BPS D-braneの消滅の場合と異なり、開弦自由度の消滅の困難を伴わない。本講演においてはゲージ場の運動方程式を数値的に解くことにより、ソリトン解が非可換平面上で拡散していくこと確かめる。さらに行列模型において導出された形式をもちいてD-brane電荷、基本弦電荷、エネルギー密度の分布を見積もり、これらの分布がタキオン凝縮の過程とともにD2-brane上において拡散していく様子を見る。また進行中の関連した研究について議論する予定である。050719osaka.ps(Local Only) |
| Title | Boundary and Midpoint Behaviors of Lump Solutions in Vacuum String Field Theory |
| Speaker | Sanefumi Moriyama (Nagoya university) |
| Date | 12th July (Tue) 15:30 |
| Comment | moriyama.pdf(Local Only) |
| Title | Dark matter direct detecion in Electron Accelerators |
| Speaker | Masato Senami (ICRR, Tokyo Univ) |
| Date | 28 June (Tue) 15:30 |
| Comment |
| Title | Supersymmetry in gauge theories with extra dimensions |
| Speaker | Tomoaki Nagasawa (Kobe Univ.) |
| Date | 14 June (Tue) 15:30 |
| Comment |
| Title | BMN Operators from Wilson Loop |
| Speaker | Akitsugu Miwa (Kyoto Univ.) |
| Date | 7 June (Tue) 15:30 |
| Comment | 050607miwa-seminar.pdf(Local Only) |
| Title | Study of Supersymmetric lattice model from Matrix model beyond Tree level |
| Speaker | Tomohisa Takimi (Kyoto Univ.) |
| Date | 31 May (Tue) 15:30 |
| Comment |
| Title | Rolling D-brane in NS5 (and related) background |
| Speaker | Yu Nakayama (Tokyo Univ.) |
| Date | 24 May (Tue) 15:30 |
| Comment |
| Title | 重いグラビティーノとモジュライ場の物理 |
| Speaker | Koichi Yoshioka (Kyushu Univ.) |
| Date | 17 May (Tue) 15:30 |
| Comment |
| Title | Dynamical Radion Superfield in 5D Action |
| Speaker | Yutaka Sakamura (Osaka Univ.) |
| Date | 10 May (Tue) 15:30 |
| Comment |
| Title | Single and pair production of H^{±±} at Hadron colliders |
| Speaker | Mayumi Aoki (KEK) |
| Date | 26 Apr (Tue) 15:30 |
| Comment |
| Title | Black Hole Entropy and Supertube |
| Speaker | Nobuyoshi Ohta (Osaka Univ.) |
| Date | 19 Apr (Tue) 15:30 |
| Comment |
| Title | Higgs Particles and Electroweak-Gravity Hierarchy in the Dynamical Gauge-Higgs Unification |
| Speaker | Yutaka Hosotani (Osaka Univ.) |
| Date | 12 Apr (Tue) 15:30 |
| Comment |