Physics of non-supersymmetric string models and their cosmology

• Project/Area Number: 26400253
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Tokyo Metropolitan University
• Principal Investigator: Kitazawa Noriaki 首都大学東京, 理工学研究科, 助教 (20271158)
• Research Collaborator: Augusto Sagnotti ピサ高等師範学校, 教授
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000); Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
• Keywords: 弦理論 / 超対称性の破れ / コンパクト空間 / 電弱対称性の破れ / 宇宙背景輻射 / インフレーション / ゲージ対称性の自発的破れ / コンパクト化

Outline of Final Research Achievements

The extra six-dimensional space in ten-dimensional space-time of superstring theory should be compactified, and its small size and shape should be stabilized so that they do not change in time. Several mechanisms to realize the stability with non-trivial dynamics among D-branes in non-supersymmetric string models was proposed. It was also proposed that the electroweak symmetry breaking could be realized by non-trivial dynamics among D-branes in non-supersymmetric string models. A prediction of string models without supersymmetry to large-angle components of the cosmic microwave background was clarified. It was shown with experts of the observation of the universe (experiments) that the prediction was supported by their observation.

Research Products

• [Int'l Joint Research] Scuola Normale Superiore di Pisa/INAF-IASF Bologna/Universita degli Studi di Ferrara(イタリア)
• [Journal Article] A new dynamics of electroweak symmetry breaking with classically scale invariance (2016)
  • Author(s): Naoyuki Haba, Hiroyuki Ishida, Noriaki Kitazawa, Yuya Yamaguchi
  • Journal Title: Physics Letters B Volume: 755 Pages: 439-443
  • DOI: 10.1016/j.physletb.2016.02.052
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Constraints on gauge-Higgs unification models at the LHC (2016)
  • Author(s): Noriaki Kitazawa and Yuki Saka
  • Journal Title: Modern Physics Letters Volume: A31 Issue: 07 Pages: 1650041-1650041
  • DOI: 10.1142/s0217732316500413
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Pre-Inflationary Relics in the CMB? (2016)
  • Author(s): A.Gruppuso, N.Kitazawa, N.Mandolesi, P.Natoli and A.Sagnotti
  • Journal Title: Physics of the Dark Universe Volume: 11 Pages: 68-73
  • DOI: 10.1016/j.dark.2015.12.001
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Revolving D-branes and Spontaneous Gauge symmetry breaking (2015)
  • Author(s): Satoshi Iso, Norikazu Kitazawa
  • Journal Title: PTEP Volume: no.12 Issue: 12 Pages: 123B01-123B01
  • DOI: 10.1093/ptep/ptv157
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] A string-inspired model for the low-l CMB (2015)
  • Author(s): Noriaki Kitazawa and Augusto Sagnotti
  • Journal Title: Modern Physics Letters A Volume: 30 Issue: 28 Pages: 1550137-1550137
  • DOI: 10.1142/s0217732315501370
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Towards the stabilization of extra dimensions by brane dynamics (2015)
  • Author(s): Noriaki Kitazawa
  • Journal Title: International Journal of Modern Physics Volume: A30 Issue: 11 Pages: 1550055-1550055
  • DOI: 10.1142/s0217751x15500554
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] Towards Realistic Models in String Theory with D-branes (2016)
  • Author(s): Noriaki Kitazawa
  • Organizer: KEK 理論センター 夏の合宿
  • Place of Presentation: 長野県安曇野市
  • Year and Date: 2016-08-04
  • Invited
• [Presentation] Pre-inflationary Physics in String Theory (2016)
  • Author(s): Noriaki Kitazawa
  • Organizer: Seminar at National Center of Theoretical Science
  • Place of Presentation: Hsinchu, Taiwan
  • Int'l Joint Research / Invited
• [Presentation] Extra Dimensions in String Phenomenology (2015)
  • Author(s): Noriaki Kitazawa
  • Organizer: New Physics Forum (8th)
  • Place of Presentation: 高エネルギー加速器研究機構
  • Year and Date: 2015-12-14
  • Invited
• [Presentation] Towards stabilization of extra dimensions by brane dynamics (2014)
  • Author(s): Noriaki Kitazawa
  • Organizer: Workshop on geometry, extra dimensions and string phenomenology
  • Place of Presentation: Miyazaki, Japan
  • Year and Date: 2014-11-04 – 2014-11-06
  • Invited
• [Presentation] String Theory clues for the low-l CMB ? (2014)
  • Author(s): Augusto Sagnotti (共同研究者）
  • Organizer: International Conference on New Frontiers in Physics
  • Place of Presentation: Kolymbari, Crete
  • Year and Date: 2014-07-28 – 2014-08-06
• [Remarks] Home Page of Noriaki Kitazawa
  • URL: http://chercher.phys.se.tmu.ac.jp/