溝口 俊弥

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アバター
研究者氏名
溝口 俊弥
 
ミゾグチ シュンヤ
所属
高エネルギー加速器研究機構
部署
素粒子原子核研究所
職名
研究機関講師

研究キーワード

 
 

研究分野

 
 

学歴

 
 
 - 
1990年
東京大学 理学系研究科 物理学
 

委員歴

 
2008年11月
 - 
2009年10月
日本物理学会  素粒子論領域世話人(領域運営委員)
 

論文

 
Unitary matrix with a Penner-like potential also yields Nf=2
溝口 俊弥、大塚 啓、田代 眸
Pays.Lett.B 掲載決定      2019年11月   [査読有り]
A dessin on the base: a description of mutually non-local 7-branes without using branch cuts
福地晋、簡直人、溝口俊弥、田代眸
Pays.Rev.D 掲載決定      2019年12月   [査読有り]
Non-Cartan Mordell-Weil lattices of rational elliptic surfaces and heterotic/F-theory compactifications
溝口 俊弥、谷 太郎
JHEP   1903 121   2018年8月   [査読有り]
On an Algebraic Structure of Dimensionally Reduced Magical Supergravity Theories
福地 晋、溝口 俊弥
Phys.Lett.   B(781) 77-82   2018年6月   [査読有り]
Enhancements in F-theory models on moduli spaces of K3 surfaces with ADE rank 17
木村 裕介、溝口 俊弥
PTEP   2018(no.4, 043B05) 1-22   2018年4月   [査読有り]
Looijenga's weighted projective space, Tate's algorithm and Mordell-Weil Lattice in F-theory and heterotic string theory
溝口 俊弥、谷 太郎
JHEP   1611(053) 1-21   2016年11月   [査読有り]
簡 直人、溝口 俊弥
Phys.Lett.   B(762) 177-183   2016年10月   [査読有り]
溝口 俊弥、坂口 智樹
PTEP   2016(no.10, 101B01) 1-8   2016年10月   [査読有り]
溝口 俊弥、谷 太郎
PTEP   2016(no.7 073B05) 1-27   2016年7月   [査読有り]
Shun'ya Mizoguchi
   2014年7月
We show that a special type of colliding 7-brane configuration of a
codimension-two singularity realizes not only a six-dimensional spectrum with
exactly the same quantum numbers as that of the three-generation E7/(SU(5) x
U(1)^3) coset family uni...
Kazuki Hinoue, Shun'ya Mizoguchi, Yukinori Yasui
Phys.Rev.   D90(10) 106009   2014年6月   [査読有り]
A supersymmetric solution to type II supergravity is constructed by
superposing two hyperkähler with torsion metrics. The solution is given by a
Käler with torsion metric with Tex holonomy. The metric is embedded into
a heterotic solution ...
F-theory Family Unification
溝口 俊弥
JHEP   1407(018) 1-39   2014年5月   [査読有り]
We propose a new geometric mechanism for naturally realizing unparallel three families of flavors in string theory, using the framework of F-theory. We consider a set of coalesced local 7-branes of a particular Kodaira singularity type and allow s...
Shun'ya Mizoguchi, Masaya Yata
PTEP   2013(5) 053B01   2012年11月   [査読有り]
Some of the supersymmetric nonlinear sigma models on exceptional groups (E7
or E8) are known to yield almost minimal necessary content of matter fields for
phenomenological model building, including three chiral families and a Higgs
multiplet. We ...
Shinya Tomizawa, Shun'ya Mizoguchi
Phys.Rev.   D87 024027   2012年10月   [査読有り]
Using the SL(2,R)-duality in a dimensionally reduced spacetime in (the
bosonic sector of) five-dimensional minimal supergravity, we construct general
Kaluza-Klein black hole solutions which carry six independent charges, its
mass, angular momentum...
Shun'ya Mizoguchi, Shinya Tomizawa
Phys.Rev.   D86 024022   2012年1月   [査読有り]
The dimensional reduction of the bosonic sector of five-dimensional minimal
supergravity to a Lorentzian four-dimensional spacetime leads to a theory with
a massless axion and a dilaton coupled to gravity and two U(1) gauge fields and
the dimensio...
Harunobu Imazato, Shun'ya Mizoguchi, Masaya Yata
   2011年7月
We consider the Gibbons-Hawking metric for a three-dimensional periodic array
of multi-Taub-NUT centers, containing not only centers with a positive NUT
charge but also ones with a negative NUT charge. The latter are regarded as
representing the a...
Shun'ya Mizoguchi, Shinya Tomizawa
   2011年6月
The dimensional reduction of (the bosonic sector of) five-dimensional minimal
supergravity to four dimensions leads to a theory with a massless axion and a
dilaton coupled to gravity and two U(1) gauge fields (one of which has
Chern-Simons couplin...
Harunobu Imazato, Shun'ya Mizoguchi, Masaya Yata
Mod.Phys.Lett.A26:1453-1457,2011      2010年10月
We show that the gauge, gravitational (tangent-bundle) and their mixed
anomalies arising from the localized modes near a 5-brane in the SO(32)
heterotic string theory cancel with the anomaly inflow from the bulk with the
use of the Green-Schwarz m...
Tetsuji Kimura, Shun'ya Mizoguchi
JHEP   1004 028   2009年12月
We show that there exist two 27 and one 27 bar of E6, net one D=4, N=1 chiral
matter supermultiplet as zero modes localized on the intersection of two
5-branes in the E8 x E8 heterotic string theory. The smeared intersecting
5-brane solution is us...
Tetsuji Kimura, Shun'ya Mizoguchi
   2009年5月
We show that there exist two 27 and one 27bar of E6, net one chiral
supermultiplet as zero modes localized on the intersecting 5-branes in the E8 x
E8 heterotic string theory. A heterotic background is constructed by the
standard embedding in the ...
Shun'ya Mizoguchi
   2008年8月
We consider type II and heterotic string compactifications on an isolated
singularity in the noncompact Gepner model approach. The conifold-type ADE
noncompact Calabi-Yau threefolds, as well as the ALE twofolds, are modeled by a
tensor product of ...
Shun'ya Mizoguchi
Phys.Lett.B669:352-356,2008      2007年11月
We construct spacetime supersymmetric, modular invariant partition functions
of strings on the conifold-type singularities which include contributions from
the discrete-series representations of SL(2, R). The discrete spectrum is
automatically con...
H. Kunitomo, S. Mizoguchi
Prog.Theor.Phys.118:559-576,2007      2007年6月
We study the Lorentz invariance of D=4 and 6 superstrings in the
double-spinor formalism, which are equivalent to the D=4 and 6 superstrings in
the pure-spinor formalism in the sense of the BRST cohomology. We first
re-examine how the conformal an...
Hiroshi Kunitomo, Shun'ya Mizoguchi
Prog.Theor.Phys.117:765-793,2007      2006年12月
We study lower-dimensional superstrings in the double-spinor formalism
introduced by Aisaka and Kazama. These superstrings can be consistently
quantized and are equivalent to the lower-dimensional pure-spinor superstrings
proposed by Grassi and Wy...
Yoshihisa Kitazawa, Shun'ya Mizoguchi, Osamu Saito
Phys.Rev.D75:106002,2007      2006年12月
We report on progress in determining the complete form of vertex operators
for the IIB matrix model. The exact expressions are obtained for those emitting
massless IIB supergravity fields up to sixth order in the light-cone
superfield, in which th...
Yoshihisa Kitazawa, Shun'ya Mizoguchi, Osamu Saito
Phys.Rev.D74:046003,2006      2006年3月
We study the zero-dimensional reduced model of D=6 pure super Yang-Mills
theory and argue that the large N limit describes the (2,0) Little String
Theory. The one-loop effective action shows that the force exerted between two
diagonal blocks of ma...
Machiko Hatsuda, Shun'ya Mizoguchi
JHEP0607:029,2006      2006年3月
We obtain sets of infinite number of conserved nonlocal charges of strings in
a flat space and pp-wave backgrounds, and compare them before and after
T-duality transformation. In the flat background the set of nonlocal charges is
the same before a...
Shun'ya Mizoguchi, Kenji Mohri, Yasuhiko Yamada
Class.Quant.Grav.23:3181-3194,2006      2005年12月
Motivated by the recent analysis of the E10 sigma model for the study of M
theory, we study a one-dimensional sigma model associated with the hyperbolic
Kac-Moody algebra G2H and its link to D=5, N=2 pure supergravity, which closely
resembles in m...
Shun'ya Mizoguchi
Nucl.Phys. B716 (2005) 462-486      2004年11月
Unitary 1-matrix models are shown to be exactly equivalent to hermitian
1-matrix models coupled to 2N vectors with appropriate potentials, to all
orders in the 1/N expansion. This fact allows us to use all the techniques
developed and results obta...
Hiroyuki Fuji, Shun'ya Mizoguchi
Nucl.Phys. B698 (2004) 53-91      2004年5月
We study the gravitational corrections to the F-term in four-dimensional N=1
U(N) gauge theories with flavors, using the Dijkgraaf-Vafa theory. We derive a
compact formula for the annulus contribution in terms of the prime form on the
matrix model...
Hiroyuki Fuji, Shun'ya Mizoguchi
Phys.Lett. B578 (2004) 432-442      2003年9月
A hermitian one-matrix model with an even quartic potential exhibits a
third-order phase transition when the cuts of the matrix model curve coalesce.
We use the known solutions of this matrix model to compute effective
superpotentials of an N=1, S...
Shun'ya Mizoguchi, Takeshi Mogami, Yuji Satoh
Phys.Lett. B564 (2003) 132-142      2003年2月
We show, by direct computations of bosonic string spectra, the O(d,d;Z)
(d=1,2) T-duality in the maximally supersymmetric IIB plane-wave background
compactified on S^1 and T^2. Only half of the ordinary set of zero modes appear
in the Hamiltonian....
Shun'ya Mizoguchi, Takeshi Mogami, Yuji Satoh
Class.Quant.Grav. 20 (2003) 1489-1502      2002年9月
We discuss the Green-Schwarz action for type IIB strings in general
plane-wave backgrounds obtained as Penrose limits from any IIB supergravity
solutions with vanishing background fermions. Using the normal-coordinate
expansion in superspace, we p...
Shun'ya Mizoguchi, Yasuhiko Yamada
Phys.Lett. B537 (2002) 130-140      2002年2月
The Weyl group symmetry W(E_k) is studied from the points of view of the
E-strings, Painleve equations and U-duality. We give a simple reformulation of
the elliptic Painleve equation in such a way that the hidden symmetry W(E_10)
is manifestly rea...
Shun'ya Mizoguchi
Phys.Lett. B523 (2001) 351-356      2001年9月
We examine whether any type II asymmetric orbifolds have the same massless
spectrum as the dimensional reduction of D=5 simple supergravity, which,
besides the eleven-dimensional supergravity, is the only known supergravity
above four dimensions w...
Shun'ya Mizoguchi, Taro Tani
Nucl.Phys. B611 (2001) 253-280      2001年5月
We propose a new prescription of how to represent D-branes in Gepner models
in more general homology classes than those in the previous constructions. The
central role is played by a certain projection acting on the
Recknagel-Schomerus boundary st...
Shun'ya Mizoguchi
   2000年9月
We construct modular invariant partition functions for type II strings on a
conifold and a singular Eguchi-Hanson instanton by means of the SL(2,R)/U(1)
version of Gepner models. In the conifold case, we find an extra massless
hypermultiplet in th...
Shun'ya Mizoguchi
JHEP 0004:014,2000      2000年3月
Extending the seminal work of Bilal and Gervais, we construct a tachyon-free,
modular invariant partition function for critical superstrings on
four-dimensional Minkowski x two-dimensional black hole. This model may be
thought of as an SL(2,R)/U(1...
Modular Invariant Critical Superstrings on Four-dimensional Minkowski Space X Two-dimensional Black Hole
JHEP   0004 014   2000年
Shun'ya Mizoguchi, Germar Schroeder
Class.Quant.Grav. 17 (2000) 835-870      1999年9月
We give a complete set of generators for the discrete exceptional U-duality
groups of toroidal compactified type II theory and M-theory in d>2. For this,
we use the DSZ quantization in d=4 as originally proposed by Hull and Townsend,
and determine...
S. Mizoguchi, N. Ohta
Phys.Lett. B441 (1998) 123-132      1998年7月
It has been known that D=5 simple supergravity resembles D=11 supergravity in
many respects. We present their further resemblances in (1) the duality groups
upon dimensional reduction, and (2) the worldsheet structure of the solitonic
string of th...
E10 SYMMETRY IN ONE-DIMENSIONAL SUPERGRAVITY.
Nucl. Phys.   B528 238-264   1998年
Reinhold W. Gebert, Shun'ya Mizoguchi
Class.Quant.Grav.15:2165-2171,1998      1997年12月
We show that any Tex-dimensional strictly stationary, asymptotically
Minkowskian solution Tex of a null reduction of Tex-dimensional pure
gravity must saturate the BPS bound provided that the KK vector field can be
identified appropriatel...
Shun'ya Mizoguchi
Nucl.Phys. B528 (1998) 238-264      1997年3月
We consider dimensional reduction of the eleven-dimensional supergravity to
less than four dimensions. The three-dimensional Tex nonlinear
sigma model is derived by direct dimensional reduction from eleven dimensions.
In two dimensi...
Shun'ya Mizoguchi
Nucl.Phys. B461 (1996) 155-180      1995年6月
The non-linear sigma model of the dimensionally reduced Einstein (-Maxwell)
theory is diagonally embedded into that of the two-dimensional heterotic string
theory. Consequently, the embedded string backgrounds satisfy the
(electro-magnetic) Ernst ...
Reinhold W. Gebert, Takeo Inami, Shun'ya Mizoguchi
Int.J.Mod.Phys. A11 (1996) 5479-5493      1995年3月
We show that the Painlevé test is useful not only for probing
(non-)integrability but also for finding the values of spins of conserved
currents (W currents) in Toda field theories (TFTs). In the case of the TFTs
based on simple Lie algebras t...
Shun'ya Mizoguchi
Phys.Rev. D51 (1995) 6788-6802      1994年11月
We study the Geroch group in the framework of the Ashtekar formulation. In
the case of the one-Killing-vector reduction, it turns out that the third
column of the Ashtekar connection is essentially the gradient of the Ernst
potential, which implie...
Shun'ya Mizoguchi, Hisashi Yamamoto
Phys.Rev. D50 (1994) 7351-7362      1993年7月
Preliminary investigations are made for the stability of the Tex expansion
in three-dimensional gravity coupled to various matter fields, which are
power-counting renormalizable. For unitary matters, a tachyonic pole appears in
the spin-2 part o...
Shun'ya Mizoguchi
Int.J.Mod.Phys. A8 (1993) 3909-3932      1992年9月
We study the Turaev-Viro invariant as the Euclidean Chern-Simons-Witten
gravity partition function with positive cosmological constant. After
explaining why it can be identified as the partition function of 3-dimensional
gravity, we show that the ...
MIZOGUCHI S, TADA T
Phys. Rev. Lett.   68(12) 1795-1798   1992年
Shun'ya Mizoguchi, Tsukasa Tada
Phys.Rev.Lett.68:1795-1798,1992      1991年10月
We study the Tex-deformed su(2) spin network as a 3-dimensional quantum
gravity model. We show that in the semiclassical continuum limit the
Turaev-Viro invariant obtained recently defines naturally regularized
path-integral Tex la Pon...

Misc

 
New Solution-generation-techniques Using SL(2, R)-duality and General Black Holes
The Thirteenth Marcel Grossmann Meeting   1327-1329   2015年
群と弦理論
溝口 俊弥
数理科学   (7月)    2013年7月   [査読有り][依頼有り]

講演・口頭発表等

 
超弦は三世代を説明するか?−F理論の最近の進展と素粒子模型構築への展望− [招待有り]
溝口 俊弥
日本物理学会第74回年次大会   2019年3月15日   
Realizing E6 GUT in F-theory [招待有り]
溝口 俊弥
KMI workshop "GUTs"   2017年12月19日   
Introduction to the theory of Gravity for Nonspecialists [招待有り]
溝口 俊弥
Workshop on Gravitational physics with particle accelerators 2017   2017年11月30日   
Looijenga’s weighted projective space, Mordell-Weil lattice and Yukawa textures from horizontal U(1) symmetries in F-theory [招待有り]
溝口 俊弥
Progress in Quantum Field Theory and String Theory II   2017年3月27日   
Anomaly-free Multiple Singularity Enhancement in F-theory
溝口 俊弥
YITP Workshop "Developments in String Theory and Quantum Field Theory”   2015年11月9日   
F-theory Family Unification: A New Geometric Mechanism for Unparallel Three Families and Large Lepton-flavor Mixings
溝口 俊弥
基研研究会   2014年7月23日   
30分で理解するF理論 [招待有り]
溝口 俊弥
3rd Workshop on Particle Physics of the Dark Universe   2014年4月19日   
F-theory family unification [招待有り]
溝口 俊弥
KEK-TH 2014   2014年2月19日   
Moduli stabilization in heterotic string theory [招待有り]
溝口 俊弥
The 3rd UTQuest workshop ExDiP 2012 “Superstring Cosmophysics”   2012年8月6日   
Chiral generations on intersecting 5-branes in heterotic string theory [招待有り]
溝口 俊弥
Yong Pyong Astro-Particle and Conformal Topical Physics 2010   2010年2月25日   
G2 sigma model
溝口 俊弥
he IV International Symposium on Quantum Theory and Symmetries   2005年8月15日   

所属学協会

 
 

競争的資金等の研究課題

 
超弦とブレーンによる現実的な素粒子模型の普遍的実現と標準模型を超えた新物理描像
日本学術振興会: 科学研究費助成事業(学術研究助成基金助成金)(基盤研究(C))
研究期間: 2016年4月 - 2019年3月    代表者: 溝口 俊弥
隠れたセクターの場や粒子が引き起こす多様な宇宙現象を用いた究極理論探査
文部科学省: 科学研究費補助金(基盤研究(A))
研究期間: 2014年4月 - 2018年3月    代表者: 小玉 英雄
超弦とブレーンによる現実的な素粒子模型の構築と標準模型を超えた新物理描像
科学研究費補助金(基盤研究(C))
研究期間: 2013年4月 - 2016年3月    代表者: 溝口 俊弥
アクシオン型モジュライの引き起こす多様な宇宙現象をもちいた余剰次元探査
科学研究費補助金(基盤研究(A)) (連携研究者)
研究期間: 2010年4月 - 2014年3月    代表者: 小玉 英雄
特異的な多様体上の超弦による現実的な素粒子模型の実現
科学研究費補助金(基盤研究(C))
研究期間: 2008年4月 - 2013年3月    代表者: 溝口 俊弥
時空超対称性に基づく反ド・ジッター時空の弦とブラックホールの物理
科学研究費補助金(基盤研究(C)) (研究分担者)
研究期間: 2006年4月 - 2009年3月    代表者: 初田真知子
行列模型による超対称ゲージ理論の相転移の研究―可積分系を用いた新手法―
科学研究費補助金(基盤研究(C)(2))
研究期間: 2004年4月 - 2007年3月    代表者: 溝口 俊弥
特異な多様体にコンパクト化された超弦の共形場理論を用いた研究
科学研究費補助金(基盤研究(C)(2))
研究期間: 2002年4月 - 2004年3月    代表者: 溝口 俊弥