Updated on 2022/03/30

写真a

 
MAEKAWA, Nobuhiro
 
Organization
Kobayashi-Maskawa Institute for the Origin of Particles and the Universe (KMI) Associate professor
Graduate School
Graduate School of Science
Title
Associate professor

Degree 1

  1. 博士(理学) ( 1993.3   京都大学 ) 

Research Interests 11

  1. B physics

  2. Flavor physics

  3. Supersymmetry

  4. Grand unified theory

  5. Elementary particle physics

  6. Neutrino

  7. String phenomenology

  8. Baryogenesis

  9. Dark matter

  10. LHC

  11. Cosmology

Research Areas 1

  1. Others / Others  / Elementary Particle/Atomic Nucleus/Cosmic Ray/Space Physics

Current Research Project and SDGs 3

  1. Natural grand unified theory and the derivation fromsuperstring theory

  2. Natural grand unified theory and cosmology

  3. Natural grand unified theory and supersymmetry breaking

Research History 3

  1. Nagoya University   Kobayashi-Maskawa Institute for the Origin of Particles and the Universe (KMI)   Associate professor

    2019.10

  2. Nagoya University   Graduate School of Science   Associate professor

    2004.10

  3. Nagoya University   Associate professor

    2011.4 - 2019.9

Education 2

  1. Kyoto University   Graduate School, Division of Natural Science   Department of Physics

    1988.4 - 1993.3

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    Country: Japan

  2. Kyoto University   Faculty of Science   Department of Physics

    1984.4 - 1988.3

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    Country: Japan

Professional Memberships 1

  1. Japan physics society

Committee Memberships 2

  1. 素粒子論グループ   素粒子論委員  

    2020.4 - 2022.3   

  2.   共通(センター)試験作成委員(物理)  

    2018.4 - 2020.3   

Awards 1

  1. 日本物理学会論文賞

    2006.3   日本物理学会  

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    Country:Japan

 

Papers 53

  1. Spontaneous SUSY breaking in natural SO(10) grand unified theory

    Maekawa Nobuhiro, Omura Yuji, Shigekami Yoshihiro, Yoshida Manabu

    PHYSICAL REVIEW D   Vol. 100 ( 11 )   2019.12

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  2. Spontaneous SUSY breaking without R symmetry in supergravity

    Maekawa Nobuhiro, Omura Yuji, Shigekami Yoshihiro, Yoshida Manabu

    PHYSICAL REVIEW D   Vol. 97 ( 5 )   2018.3

  3. Constraints of chromoelectric dipole moments to natural SUSY type sfermion spectrum

    Maekawa Nobuhiro, Muramatsu Yu, Shigekami Yoshihiro

    PHYSICAL REVIEW D   Vol. 95 ( 11 )   2017.6

  4. Flavor changing nucleon decay Reviewed

    Nobuhiro Maekawa, Yu Muramatsu

    Physics Letter B   Vol. 767   page: 398 - 402   2017.4

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    Recent discovery of neutrino large mixings implies the large mixings in the diagonalizing matrices
    of ¯5 fields in SU(5) grand unified theory (GUT), while the diagonalizing matrices of 10 fields of
    SU(5) are expected to have small mixings like Cabibbo-Kobayashi-Maskawa matrix. We calculate
    the predictions of flavor changing nucleon decays (FCND) in SU(5), SO(10), and E6 GUT models
    which have the above features for mixings. We found that FCND can be the main decay mode and
    play an important role to test GUT models.

    DOI: 10.1016/j.physletb.2017.02.028

    Web of Science

  5. Chiral Four-Dimensional Heterotic String Vacua from Covariant Lattices Foreword

    Maekawa Nobuhiro

    CHIRAL FOUR-DIMENSIONAL HETEROTIC STRING VACUA FROM COVARIANT LATTICES     page: V - VI   2017

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  6. Neutrino masses and mixings as an evidence of GUT, and the impact to (flavor changing) nucleon decay

    Maekawa Nobuhiro, Muramatsu Yu

    WORKSHOP ON NEUTRINO PHYSICS AND UNIFICATION, NEAR DETECTOR PHYSICS AND DARK MATTER (CETUP* 2016)   Vol. 1900   2017

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    Language:Japanese  

    DOI: 10.1063/1.5010112

    Web of Science

  7. Leptogenesis in E6*U(1) SUSY GUT model Reviewed

    Takuya Ishihara, Nobuhiro Maekawa, Mao Takegawa, Masato Yamanaka

    Journal of High Energy Physics   Vol. 1602   page: 108   2016.2

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    We study the thermal leptogenesis in the E 6 ×U(1) A SUSY GUT model in which realistic masses and mixings of quarks and leptons can be realized. We show that the sufficient baryon number can be produced by the leptogenesis in the model, in which the mass parameter of the lightest right-handed neutrino is predicted to be smaller than 10 8 GeV. The essential point is that the mass of the lightest right-handed neutrino can be enhanced in the model because it has a lot of mass terms whose mass parameters are predicted to be the same order of magnitude which is smaller than 10 8 GeV. We show that O(10) enhancement for the lightest right-handed neutrino mass is sufficient for the observed baryon asymmetry. Note that such mass enhancements do not change the predictions of neutrino masses and mixings at the low energy scale in the E 6 model which has six right-handed neutrinos. In the calculation, we include the effects of supersymmetry and flavor in final states of the right-handed neutrino decay. We show that the effect of supersymmetry is quite important even in the strong washout regime when the effect of flavor is included. This is because the washout effects on the asymmetries both of the muon and the electron become weaker than that of the tau asymmetry.

    DOI: 10.1007/JHEP02(2016)108

    arXiv

  8. preheating with higher dimensional interaction Reviewed

    Seishi Enomoto, Nobuhiro Maekawa, Tomohiro Matsuda

    Physical Review D   Vol. 91 ( 10 ) page: 103504   2015.5

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    Particle production caused by the oscillation after inflation is important since it explains reheating after inflation. On the particle theory side, we know that effective action may have additional higher dimensional terms (usually called nonrenormalizable terms) suppressed by the cutoff scale. Moreover, interaction between the inflaton and so-called moduli field will be higher dimensional. Therefore, if such higher dimensional interaction is significant for resonant particle production, one cannot avoid the effect in a preheating study. We explicitly calculated the required number of oscillations for the energy transfer. Consequently, cosmological history of an oscillating field and the moduli problem can be reconsidered.

    DOI: 10.1103/PhysRevD.91.103504

  9. The heavy gravitino, naturalness, and sizable anomaly mediation Reviewed

    Nobuhiro Maekawa, Kenichi Takayama

    Progress of Theoretical and Experimental Physics   Vol. 093   page: 04   2014

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    We consider the situation in which m_{3/2}\sim O(100{\rm TeV}) for solving the gravitino problem and the other supersymmetry(SUSY) breaking parameters are O(1{\rm TeV}) for the naturalness. We point out that the anomaly mediation cancels out the renormalization group contribution to the gaugino masses and the sfermion masses other than the stop masses at a scale which is called the mirage scale. The situation is similar to the mirage mediation, in which special boundary conditions for the SUSY breaking parameters are required, though for the stop masses and the up-type Higgs mass, such cancellation at the mirage scale does not happen. Despite no cancellation for the up-type Higgs mass, we show that the little hierarchy problem becomes less severe in this situation. One advantage of this situation over the mirage mediation is that the stop mixing parameter A_t can be larger and therefore, smaller stop mass is sufficient for 125 GeV Higgs. When the mirage scale is around TeV scale, the SUSY breaking parameters induced by the gravity mediation at the grand unification scale can be observed directly by the TeV scale experiments.

    DOI: DOI:10.1093/ptep/ptu118

  10. Sizable D-term contributions as a signature of the E6*SU(2)F*U(1)A SUSY GUT model Reviewed

    Nobuhiro Maekawa, Yu Muramatsu, Yoshihiro Shigekami

    Progress of Theoretical and Experimental Physics   Vol. 113   page: 02(18pages)   2014

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    We show that the sizable D-term contributions to sfermion mass spectrum can be signatures of certain GUT, E6×SU(2)F×U(1)A GUT. Note that these D-term contributions deviate the degenerate sfermion masses among different generations in this model. This is different from the previous works which have argued the D-term contributions, which deviate masses only between sfermions with different quantum charges, as a signature of GUT with larger rank unification group. Such D-terms are strongly constrained by the FCNC processes if the SUSY breaking scale is the weak scale. However, in E6×SU(2)F×U(1)A, natural SUSY type sfermion mass spectrum is obtained, and if the masses of 103 sfermions are larger than O(1TeV) to realize 126 GeV Higgs and the other sfermion masses are O(10TeV), then sizable D-term contribution is allowed. If the deviations by these D-terms can be observed in future experiments like 100 TeV proton collider or muon collider, we may confirm the E6×SU(2)F×U(1)A GUT.

    DOI: 10.1093/ptep/ptu151

  11. Nucleon decay via dimension 6 operators in anomalous U(1) SUSY GUT Reviewed

    Nobuhiro Maekawa, Yu Muramatsu

    Physical Review D 88   Vol. 88   page: 095008   2013

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    Nucleon lifetimes for various decay modes via dimension 6 operators are calculated in the anomalous U(1)_A GUT scenario, in which the unification scale \Lambda_u becomes smaller than the usual suersymmetric (SUSY) unification scale \Lambda_G=2\times 10^{16} GeV in general. Since the predicted lifetime \tau(p \rightarrow \pi^0 + e^c) becomes around the experimental lower bound though it is strongly dependent on the explicit models, the discovery of the nucleon decay in near future can be expected. We explain why the two ratios R_1 \equiv \Gamma_{n \rightarrow \pi^0 + \nu^c}/\Gamma_{p \rightarrow \pi^0 + e^c} and R_2 \equiv \Gamma_{p \rightarrow K^0 + \mu^c}/\Gamma_{p \rightarrow \pi^0 + e^c} are important in identifying grand unification group and we show that three anomalous U(1)_A SUSY GUT models with SU(5), SO(10) and E_6 grand unification group can be identified by measuring the two ratios. If R_1 is larger than 0.4, the grand unification group is not SU(5), and moreover if R_2 is larger than 0.3, the grand unification group is implied to be E_6.

    DOI: 10.1103/PhysRevD.88.095008

  12. Neutrino properties in E6xSU(2) SUSY GUT with spontaneous CP violation Reviewed

    Nobuhiro Maekawa, Kenichi Takayama

    Physical Review D   Vol. 85   page: 095015   2012

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  13. Averaged Number of the Lightest Supersymmetric Particles in Decay of Superheavy Particle with Long Lifetime Reviewed

    Yasuhiro Kurata, Nobuhiro Maekawa

    Progress of Theoretical Physics   Vol. 127   page: 657   2012

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  14. Heterotic E6 GUTs and Partition Functions Reviewed

    Motoharu Ito, Shogo Kuwakino, Nobuhiro Maekawa, Sanefumi Moriyama, Keijiro Takahashi, Kazuaki Takei, Shunsuke Teraguchi, Toshifumi Yamashita

    Journal of High Energy Physics   Vol. 1112   page: 100   2011.12

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  15. E6 grand unified theory with three generations from heterotic string Reviewed

    Motoharu Ito, Shogo Kuwakino, Nobuhiro Maekawa, Sanefumi Moriyama, Keijiro Takahashi, Kazuaki Takei, Shunsuke Teraguchi, Toshifumi Yamashita

    Physical Review D   Vol. 83   page: 091703   2011

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    DOI: 10.1103/PhysRevD.83.091703

  16. Baryogenesis by B-L generation due to superheavy particle decay Reviewed

    Seishi Enomoto, Nobuhiro Maekawa

    Physical Review D   Vol. 84   page: 096007   2011

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  17. Flavor structure of E6 GUT models Reviewed

    Hidetoshi Kawase, Nobuhiro Maekawa

    Progress of Theoretical Physics   Vol. 123   page: 941-955   2010.6

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    It has been pointed out that in E6 grand unified theory with SU(2) family symmetry, the spontaneous CP violation can solve the supersymmetric CP problem. The scenario predicts V_{ub} \sim O(\lambda^4) rather than O(\lambda^3) which is naively expected value, because of a cancellation at the leading order. Since the experimental value of V_{ub} is O(\lambda^4), it must be important to consider the reason and the conditions for the cancellation. In this paper, we give a simple reason for the cancellation and show that in some E6 models such a cancellation requires that the vacuum expectation value (VEV) of the adjoint Higgs does not break U(1)_{B-L}. Note that this direction of the VEV plays an important role in solving the doublet-triplet splitting problem by Dimopoulos-Wilczek mechanism. In this E6 models, the experiments may measure the direction of the adjoint Higgs VEV by measuring the size of V_{ub} \sim O(\lambda^4).

  18. Gauge-mediated supersymmetry breaking with generalized messenger sector at LHC Reviewed

    Kawase, Maekawa, Sakurai

    Journal of High Energy Physics   Vol. 1001   page: 027   2010.1

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  19. LHC signature of supersymmetric models with non-universal sfermion masses Reviewed

    Kim, Maekawa, Nagao, Nojiri, Sakurai

    Journal of High Energy Physics   Vol. 0910   page: 005   2009

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  20. CEDM constraints on modified sfermion universality and spontaneous CP violation Reviewed

    Ishiduki, Kim, Maekawa, Sakurai

    Progress of Theoretical Physics   Vol. 122   page: 659-671   2009

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  21. Spontaneous SUSY breaking with anomalous U(1) symmetry in metastable vacua and moduli stabilization Reviewed

    Kim, Maekawa, Nishino, Sakurai

    Physical Review D   Vol. 79   page: 055009   2009

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  22. CP asymmetries of B->phi K and B->eta' K in SUSY GUT Model with Non-universal Sfermion Masses Reviewed

    Kim, Maekawa, Matsuzaki, Sakurai, Yoshikawa

    Progress of Theoretical Physics   Vol. 121   page: 49-72   2009

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  23. *Spontaneous CP violation in E6 SUSY GUT with SU(2) flavor and anomalous U(1) symmetries(*) Reviewed

    Ishiduki, Kim, Maekawa, Sakurai

    Physical Review D   Vol. 80   page: 115011   2009

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    We showed that in E6 grand unified theory with family symmetry, spontaneous CP violation can not only solve the SUSY CP problem but also realize reasonable Kabayashi-Maskawa phase. I think that this scenario is one of the most promizing scenario which explains the origin of the Kobayashi-Maskawa matrix.

  24. Neutralino Dark Matter in minimal supersymmetric standard model with natural light Higgs sector Reviewed

    Kim, Maekawa, Nagao, Sakurai, Yoshikawa

    Physical Review D   Vol. 78   page: 075010   2008

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  25. Lepton flavor violation in SUSY GUT model with non-universal sfermion masses Reviewed

    S.-G. Kim, N. Maekawa, A. Matsuzaki, K. Sakurai, T. Yoshikawa

    Physical Review D   Vol. 75   page: 115008   2007

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    In E6 grand unified theory with horizontal symmetry, a specific sfermion mass spectrum is predicted. In this paper, we calculated the lepton flavor violation processes predicted by the sfermion mass spectrum. We pointed out that tau->mu gamma can be observed in (super) B factory and mu-> e gamma in MEG experiment.

  26. Solution for little hierarchy problem and b-> s gamma Reviewed

    S.-G. Kim, N. Maekawa, A. Matsuzaki, K. Sakurai, A.I. Sanda, T. Yoshikawa

    Physical Review D   Vol. 74   page: 115016   2006

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    When the standard model Higgs mass bound obtained by LEP is applied to the Higgs in supersymmetric models, the electroweak scale becomes unstable because of the large stop mass. This is called the little hierarchy problem. We pointed out that in the minimal supersymmetric standard model, there is a parameter region in which the coupling between the lightest higgs and Z boson becomes smaller than in the standard model and the higgs mass bound cannot be applied. We also pointed out that in the parameter region, all the Higgs bosons become light, but the contribution to the b->s gamma process can be cancelled by supersymmetric contribution.

  27. Horizontal symmetry in Higgs sector of GUT with U(1) symmetry Reviewed

    Nobuhiro Maekawa, Toshifumi Yamashita

    Journal of High Energy Physics   Vol. 0407   page: 009   2004

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  28. E6 unification, large neutrino mixings, and SUSY flavor problem Reviewed

    Nobuhiro Maekawa

    Progress of Theoretical Physics   Vol. 112   page: 639-652   2004

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  29. *Non Abelian horizontal symmetry and anomalous U(1) symmetry for supersymmetric flavor problem(*) Reviewed

    Nobuhiro Maekawa

    Physics Letters B   Vol. 561   page: 273-278   2003

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  30. Gauge coupling unification in GUT with anomalous U(1) symmetry Reviewed

    Nobuhiro Maekawa, Toshifumi Yamashita

    Physical Review Letters   Vol. 90   page: 121801   2003

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  31. *Gauge coupling unification with anomalous U(1) gauge symmetry Reviewed

    Nobuhiro Maekawa

    Progress of Theoretical Physics   Vol. 107   page: 597-619   2002

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  32. E6 unification, doublet-triplet splitting and anomalous U(1) symmetry Reviewed

    Nobuhiro Maekawa, Toshifumi Yamashita

    Progress of Theoretical Physics   Vol. 107   page: 1201-1233   2002

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  33. *Neutrino masses, anomalous U(1) gauge symmetry and doublet-triplet splitting Reviewed

    Nobuhiro Maekawa

    Progress of Theoretical Physics   Vol. 106   page: 401-418   2001

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  34. E6 unification with bi-large neutrino mixing Reviewed

    Masako Bando, Nobuhiro Maekawa

    Progress of Theoretical Physics   Vol. 106   page: 1255-1274   2001

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  35. A natural solution for the mu problem with anomalous U(1) gauge symmetry Reviewed

    Nobuhiro Maekawa

    Physics Letters B   Vol. 521   page: 42-46   2001

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  36. A Model with simultaneous dynamical breaking of supersymmetry and GUT gauge symmetry Reviewed

    Hirayama, Ishimura, Maekawa

    Progress of Theoretical Physics   Vol. 101   page: 1343-1351   1999

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  37. Anomalous U(1) gauge symmetry and lepton flavor violation Reviewed

    Kurosawa, Maekawa

    Progress of Theoretical Physics   Vol. 102   page: 121-140   1999

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  38. Deformations of N=2 dualities to N=1 dualities in SU, SO and USp gauge theories Reviewed

    Hirayama, Maekawa, Sugimoto

    Progress of Theoretical Physics   Vol. 99   page: 843-874   1998

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  39. Duality of a supersymmetric standard model Reviewed

    Maekawa

    Progress of Theoretical Physics   Vol. 95   page: 943-948   1996

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  40. Duality of a supersymmetric standard model without R-parity Reviewed

    Maekawa, Sato

    Progress of Theoretical Physics   Vol. 96   page: 979-984   1996

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  41. Duality of a supersymmetric model with the Pati-Salam group Reviewed

    Maekawa,Takahashi

    Progress of Theoretical Physics   Vol. 95   page: 1167-1172   1996

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  42. Vector-like fermions' condensation with small S and T parameters Reviewed

    Nobuhiro Maekawa

    Physical Review D   Vol. 52   page: 1684-1692   1995

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  43. Vector-like strong coupling theory with small S and T parameters Reviewed

    Maekawa

    Progress of Theoretical Physics   Vol. 93   page: 919-926   1995

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  44. Lepton anti-leton gamma gamma events as a signal for new strong coupling physics Reviewed

    Maekawa

    Progress of Theoretical Physics   Vol. 92   page: 603-610   1994

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  45. Improving the effective potential Reviewed

    Masako Bando, Taichiro Kugo, Nobuhiro Maekawa, Hiroaki Nakano

    Physics Letters B   Vol. 301   page: 83-89   1993

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  46. A handy calculating method of Higgs potential in SUSY model Reviewed

    Bando, Maekawa, Nakano, Sato

    Modern Physics Letters A   Vol. 8   page: 2729-2736   1993

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  47. A signal for technicolor? Reviewed

    Bando, Maekawa

    Modern Physics Letters A   Vol. 8   page: 2141-2146   1993

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  48. Improving the effective potential:Multimass scale case Reviewed

    Masako Bando, Taichiro Kugo, Nobuhiro Maekawa, Hiroaki Nakano

    Progress of Theoretical Physics   Vol. 90   page: 405-418   1993

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  49. *'Spontaneous' CP violation in minimal supersymmetric standard model Reviewed

    Nobuhiro Maekawa

    Physics Letters B   Vol. 282   page: 387-392   1992

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  50. Why is top heavier than bottom? Yukawa and mass unification in SUSY model Reviewed

    Bando, Kugo, Maekawa, Nakano

    Modern Physics Letters A   Vol. 7   page: 3379-3390   1992

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  51. On weak isospin violation due to dynamically generated top quark mass Reviewed

    Bando, Maekawa, Suehiro

    Physics Letters B   Vol. 254   page: 207-214   1991

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  52. Critical Instability in terms of renormalization group equation Reviewed

    Bando, Kugo, Maekawa, Nakano

    Physical Review D   Vol. 44   page: 2957-2961   1991

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  53. Composite Condition in Renormalization Group Equation Reviewed

    Bando, Kugo, Maekawa, Sasakura, Watabiki

    Physics Letters B   Vol. 246   page: 466-470   1990

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MISC 1

  1. 大統一理論のいま Invited

    前川展祐

    パリティ   Vol. 33 ( 11 ) page: 4 - 12   2018.11

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    Authorship:Lead author, Last author, Corresponding author   Language:Japanese  

Presentations 17

  1. 標準模型を超える物理とフレーバー物理 Invited

    前川展祐

    フレーバーワークショップ  2020.11.25 

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    Event date: 2020.11

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:ZOOM   Country:Japan  

  2. Future prospects of flavor physics Invited International conference

    Nobuhiro Maekawa

    Koichiro Nishikawa Memorial Symposium  2019.9.27 

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    Event date: 2019.9

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:KEK, Tsukuba   Country:Japan  

  3. Spontaneous SUSY breaking in natural GUT and axino LSP International conference

    Nobuhiro Maekawa, Y. Omura, Y. Shigekami, M. Yoshida

    SUSY2019  2019.5.21 

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    Event date: 2019.5

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Texas A&M University - Corpus Christi.   Country:United States  

  4. Spontaneous SUSY breaking in natural SO(10) GUT International conference

    Nobuhiro Maekawa, Y. Omura, Y. Shigekami, M. Yoshida

    KEK phenomenology 2018  2018.12.5 

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    Event date: 2018.12

    Language:English   Presentation type:Oral presentation (general)  

  5. 真実の大統一理論を求めて Invited

    前川展祐

    2018.9.6 

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    Event date: 2018.9

    Language:Japanese   Presentation type:Oral presentation (keynote)  

    Venue:坂出   Country:Japan  

  6. Spontaneous SUSY breaking in natural SO(10) GUT International conference

    Nobuhiro Maekawa, Y. Omura, Y. Shigekami, M. Yoshida

    Summer Institute 2018  2018.8.16 

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    Event date: 2018.8

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Tianjin  

  7. Spontaneous SUSY breaking in natural SO(10) GUT International conference

    Nobuhiro Maekawa, Y. Omura, Y. Shigekami, M. Yoshida

    SUSY 2018  2018.7.23 

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    Event date: 2018.7

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Barcellona   Country:Spain  

  8. 自然なE6大統一理論の魅力と現状

    前川展祐

    例外群研究会  2017.7.17 

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    Event date: 2017.7

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:KEK つくば   Country:Japan  

  9. E6 GUT and nucleon decay via dimension 6 operators International conference

    Nobuhiro Maekawa, Yu Muramatsu

    Baryon and Lepton Number Violation 2017(BLV2017)  2017.5.17 

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    Event date: 2017.5

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Cleveland   Country:United States  

  10. Neutrino masses and mixings as an evidence of GUT, and the impact to (flavor changing) nucleon decay Invited International conference

    Nobuhiro Maekawa

    HINT2016(High intensity accelerators for particle and nuclear physics 

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    Event date: 2016.12

    Language:English   Presentation type:Oral presentation (general)  

    Venue:J-Parc, Tokai, Ibaragi   Country:Japan  

  11. Neutrino masses and mixings as an evidence of GUT, and the impact to (flavor changing) nucleon decay Invited International conference

    Nobuhiro Maekawa

    CETUP Neutrino Physics/Unification Workshop 

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    Event date: 2016.6 - 2016.7

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Deadwood, South Dakoda, USA   Country:United States  

  12. Neutirno masses and mixings as an evidence of GUT, and the impact to nucleon decay and leptogenesis Invited International conference

    Nobuhiro Maekawa

    NNN2015(International Workshop for the Next Generation Nucleon Decay and Neutrino Detector ) 

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    Event date: 2015.10

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Stony Brook, USA   Country:United States  

  13. GUT with neutrinos Invited International conference

    Nobuhiro Maekawa

    Workshop for Neutrino Programs with facilities 

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    Event date: 2015.8

    Language:English   Presentation type:Oral presentation (general)  

    Venue:J-Parc, Tokai, Ibaragi, Japan   Country:Japan  

  14. E6 SUSY GUT and FCNC International conference

    CTP symposium on Supersymmetry at LHC 

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    Event date: 2007.3

    Language:English   Presentation type:Oral presentation (general)  

  15. (E6) SUSY GUT and FCNC International conference

    2nd workshop on B factories and New Measurements 

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    Event date: 2006.12

    Language:English  

    Country:Japan  

  16. (E6)GUT and FCNC

    Workshop on B Factories and New Measurements 

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    Event date: 2006.9

    Language:English  

    Country:Japan  

  17. A solution for little hierarchy problem and b->s gamma International conference

    Supersymmetry and the Unification of Fundamental Interactions, Irvine, California (2006) 

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    Event date: 2006.6

    Language:English  

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KAKENHI (Grants-in-Aid for Scientific Research) 6

  1. Phenomenology of natural GUT with spontaneous SUSY breaking and extra dmension

    Grant number:19K03823  2019.4 - 2023.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

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    Authorship:Principal investigator 

    Grant amount:\4420000 ( Direct Cost: \3400000 、 Indirect Cost:\1020000 )

  2. Building the cosmological history and constraints from experiments in natural grand unified theory

    2015.4 - 2019.3

    Grant-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research(C)

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    Authorship:Principal investigator 

  3. Cosmology and experimental constraints in natural grand unified theories

    Grant number:15K05048  2015.4 - 2019.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    Maekawa Nobuhiro

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    Authorship:Principal investigator 

    Grant amount:\4810000 ( Direct Cost: \3700000 、 Indirect Cost:\1110000 )

    In cosmology, we have shown that the thermal leptogenesis, which does not work well in SO(10) GUT, works well in natural E6 GUT.
    In the point of view of experimental constraints, we have shown that natural SUSY, which is predicted by E6 GUT, has generically an issue in which electric dipole moments bocome too large, but in E6 GUT, such problem can be naturally evaded. In the nucleon decay which are mediated by new gauge particles in GUT, branching ratio of generation changing modes becomes larger in E6 GUT than the usual GUT.
    We have built a natural GUT in which SUSY is spontaneously broken.

  4. 自然な大統一理論におけるLHC物理

    2008

    科学研究費補助金  特定領域研究,課題番号:20025002

    前川 展祐

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    Authorship:Principal investigator 

  5. 自然な大統一理論と宇宙論と超弦理論からの導出とその予言

    2007.4 - 2010.3

    科学研究費補助金  基盤研究(B)(一般),課題番号:19340059

    前川 展祐

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    Authorship:Principal investigator 

  6. 自然な大統一理論とフレーバー物理

    2007.4 - 2008.3

    科学研究費補助金  特定領域研究(公募,A06),課題番号:19034004

    前川 展祐

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    Authorship:Principal investigator 

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Teaching Experience (On-campus) 40

  1. 2年秋物理演習

    2021

  2. 先端物理学特論

    2021

  3. 素粒子物理学

    2021

  4. Fundamentals of Advanced PhysicsⅠ

    2021

  5. Topics in Mechanics

    2021

  6. Analytical Mechanics II

    2021

  7. 素粒子

    2021

     詳細を見る

    大統一理論の基礎を説明し、3つの力を統一するだけでなく、クォーク、レプトンも統一することを示す。また、それぞれの統一に対して実験からのサポートがあることを学ぶ。

  8. 量子力学III

    2016

  9. 素核セミナーIV

    2016

  10. 物理学セミナーIII-1

    2016

  11. 量子力学III

    2015

  12. 素核セミナーIV

    2015

  13. 物理学セミナーIII-1

    2015

  14. quantum mechanics III

    2014

  15. 素核セミナー4

    2014

  16. 物理学セミナーIII-1

    2014

  17. 量子力学III

    2013

  18. 素核セミナー4

    2013

  19. 物理学セミナーIII-1

    2013

  20. 物理学セミナーIII-1

    2012

  21. 素核セミナー4

    2012

  22. 物理学演習II-1

    2012

  23. 量子力学Ⅱ

    2010

  24. 物理学演習Ⅲ

    2010

  25. 素粒子

    2010

  26. elementary particle physics

    2009

  27. 物理学演習III

    2009

  28. Quantum mechanics II

    2009

  29. 量子力学Ⅱ

    2008

  30. 物理学演習Ⅲ

    2008

  31. 素粒子

    2008

  32. 量子力学Ⅱ

    2007

  33. 素粒子

    2007

  34. 物理学演習Ⅲ

    2007

  35. 量子力学Ⅱ

    2006

  36. 素粒子

    2006

  37. 物理学演習Ⅲ

    2006

  38. 量子力学Ⅱ

    2005

  39. 素粒子

    2005

  40. 物理学演習Ⅲ

    2005

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