D-branes and closed string field theory

• Project/Area Number: 20540247
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: University of Tsukuba
• Principal Investigator: ISHIBASHI Nobuyuki 筑波大学, 数理物質系, 教授 (70211729)
• Project Period (FY): 2008 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2011: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2010: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2009: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2008: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
• Keywords: 超弦理論 / 弦の場の理論 / D-ブレーン / D-プレーン / 弦の場理論 / 行列模型

Research Abstract

I have done research on string field theory which gives a nonperturbative definition of string theory. The specific topic includes
1. We have proposed the dimensional regularization method to deal with the contact term problem of light-cone gauge superstring field theory. We have shown that the string field theory can reproduce the tree amplitudes correctly.
2. We have shown that the dimensional regularization can be considered for Witten type string field theory.
3. We have shown that the energy for classical solutions in Witten’s open string field theory can be written in terms of a gauge invariant observable.

Research Products

• [Journal Article] Energy from the gauge invariant observables (2013)
  • Author(s): Takayuki Baba, Nobuyuki Ishibashi
  • Journal Title: JHEP Volume: 1204 Issue: 4 Pages: 50-50
  • DOI: 10.1007/jhep04(2013)050
  • NAID: 120007136824
  • Peer Reviewed
• [Journal Article] Spacetime Fermions in Light-cone Gauge Superstring Field Theory and Dimensional Regularization (2011)
  • Author(s): Nobuyuki Ishibashi, Koichi Murakami
  • Journal Title: JHEP Volume: 1107 Issue: 7 Pages: 90-90
  • DOI: 10.1007/jhep07(2011)090
  • NAID: 120007137444
  • Peer Reviewed
• [Journal Article] Light-cone Gauge String Field Theory and Dimensional Regularization (2011)
  • Author(s): Nobuyuki Ishibashi, Koichi Murakami
  • Journal Title: Progress of Theoretical Physics Supplement Volume: 188 Pages: 9-18
  • DOI: 10.1143/ptps.188.9
  • NAID: 110008670849
• [Journal Article] Light-cone Gauge NSR Strings in Noncritical Dimensions II --Ramond sector (2011)
  • Author(s): Nobuyuki Ishibashi and Koichi Murakami
  • Journal Title: JHEP Volume: 1101 Issue: 1 Pages: 8-8
  • DOI: 10.1007/jhep01(2011)008
  • NAID: 120007130938
  • Peer Reviewed
• [Journal Article] Amplitudes in Noncritical Dimensions and Dimensional Regularization (2011)
  • Author(s): K.Murakami, N.Ishibashi
  • Journal Title: Progress of Theoretical Physics Supplement Volume: 188 Pages: 19-28
  • DOI: 10.1143/ptps.188.19
  • NAID: 110008670850
• [Journal Article] Light-cone Gauge NSR Strings in Noncritical Dimensions II-Ramond sector (2011)
  • Author(s): Ishibashi, Murakami
  • Journal Title: JHEP 1101 Pages: 8-8
  • NAID: 120007130938
  • Peer Reviewed
• [Journal Article] Light-cone Gauge NSRStrings in Noncritical Dimensions (2010)
  • Author(s): Yutaka Baba, Nobuyuki Ishibashi and Koichi Murakami
  • Journal Title: JHEP Volume: 1001 Issue: 1 Pages: 119-119
  • DOI: 10.1007/jhep01(2010)119
  • Peer Reviewed
• [Journal Article] Light-cone Gauge NSR Strings in Noncritical Dime nsions (2010)
  • Author(s): Baba, Ishibashi, Murakami
  • Journal Title: JHEP 1001 Pages: 119-119
  • Peer Reviewed
• [Journal Article] Light-cone Gauge Superstring Field Theory and Dimensional Regularization II (2010)
  • Author(s): Baba, Ishibashi, Murakami
  • Journal Title: JHEP Volume: 1008:102
  • NAID: 120007137878
  • Peer Reviewed
• [Journal Article] Light-cone Gauge NSR Strings in Noncritical Dimensions II-Ramond sector (2010)
  • Author(s): Ishibashi, Murakami
  • Journal Title: JHEP Volume: 1101:0082011
  • NAID: 120007130938
  • Peer Reviewed
• [Journal Article] Light-cone Gauge NSR Strings in Noncritical Dimensions (2010)
  • Author(s): Baba, Ishibashi, Murakami
  • Journal Title: JHEP 1001:119
  • Peer Reviewed
• [Journal Article] Light-cone Gauge String Field Theory in Noncritical Dimensions (2009)
  • Author(s): Yutaka Baba, Nobuyuki Ishibashi and Koichi Murakami
  • Journal Title: JHEP Volume: 0912 Issue: 12 Pages: 10-10
  • DOI: 10.1088/1126-6708/2009/12/010
  • Peer Reviewed
• [Journal Article] Light-cone Gauge String Field Theory in Noncritical Dimensions (2009)
  • Author(s): Baba, Ishibashi, Murakami
  • Journal Title: JHEP 0912 Pages: 10-10
  • Peer Reviewed
• [Journal Article] Light-cone Gauge Superstring Field Theory and Dimensional Regularization (2009)
  • Author(s): Baba, Ishibashi, Murakami
  • Journal Title: JHEP 0910:035
  • Peer Reviewed
• [Journal Article] Light-cone Gauge String Field Theory in Noncritical Dimensions (2009)
  • Author(s): Baba, Ishibashi, Murakami
  • Journal Title: JHEP 0912:010
  • Peer Reviewed
• [Journal Article] D-brane States and Annulus Amplitudes in Osp Invariant Closed String Field Theory (2008)
  • Author(s): Yutaka Baba, Nobuyuki Ishibashi and Koichi Murakami
  • Journal Title: JHEP Volume: 0807 Issue: 07 Pages: 46-46
  • DOI: 10.1088/1126-6708/2008/07/046
  • Peer Reviewed
• [Journal Article] D-branes and Closed String Field Theory (2008)
  • Author(s): Nobuyuki Ishibashi, Yutaka Baba and Koichi Murakami
  • Journal Title: International Journal of Physics Volume: A23 Issue: 14n15 Pages: 2220-2228
  • DOI: 10.1142/s0217751x0804086x
  • NAID: 120007138599
  • Peer Reviewed
• [Journal Article] D-brane States and Annulus Amplitudes in Osp Invariant Closed String Field Theory (2008)
  • Author(s): Baba, Ishibashi and Murakami
  • Journal Title: JHEP 0807:046
  • Peer Reviewed
• [Journal Article] D-branes and Closed String Field Theory (2008)
  • Author(s): Ishibashi, Baba and Murakami
  • Journal Title: International Journal of Physics A23 Pages: 2220-2228
  • NAID: 120007138599
• [Presentation] Energy from the gauge invariant observables (2012)
  • Author(s): Nobuyuki Ishibashi
  • Organizer: String Field Theory and Related Topics V, SFT2012
  • Place of Presentation: The Israel Institute for Advanced Studies, Hebrew University of Jerusalem, (イスラエル)
  • Year and Date: 2012-10-31
• [Presentation] Energy from the gauge invariant observables (2012)
  • Author(s): Nobuyuki Ishibashi
  • Organizer: String Field Theory and Related Aspects V, SFT 2012
  • Place of Presentation: The Israel Institute for Advanced Studies (IAS) The Hebrew University of Jerusalem
  • Invited
• [Presentation] Dimensional regularization of Witten's OSFT (2011)
  • Author(s): Nobuyuki Ishibashi
  • Organizer: String Field Theory 2011
  • Place of Presentation: プラハ(チェコ共和国)
  • Year and Date: 2011-09-20
• [Presentation] Light-cone Gauge Superstring Field Theory and Dimensional Regularization (2010)
  • Author(s): Nobuyuki Ishibashi
  • Organizer: String field theory and related aspects at Kyoto Yukawa Institute
  • Place of Presentation: 京都
  • Year and Date: 2010-10-18
• [Presentation] Light-cone Gauge Superstring Field Theory and Dimensional Regularization (2010)
  • Author(s): N.Ishibashi
  • Organizer: String field theory and related aspects
  • Place of Presentation: Kyoto Yukawa Institute
  • Year and Date: 2010-10-18
• [Presentation] Light-cone Gauge Superstring Field Theory and Dimensional Regularization (2010)
  • Author(s): N.Ishibashi
  • Organizer: String field theory and related aspects
  • Place of Presentation: 京都大学基礎物理学研究所
  • Year and Date: 2010-10-18
• [Presentation] Light-cone Gauge String Field Theory in Noncritical Dimensions (2010)
  • Author(s): N.Ishibashi
  • Organizer: 弦理論研究会(2010)
  • Place of Presentation: 立教大学
  • Year and Date: 2010-01-05
• [Presentation] Light-cone Gauge String Field Theory in Noncritical Dimensions (2009)
  • Author(s): Nobuyuki Ishibashi
  • Organizer: APCTP Foucs Program on Current Trends in String Field Theory at APCTP
  • Place of Presentation: ソウル(大韓民国)
  • Year and Date: 2009-12-07
• [Presentation] Light-cone Gauge String Field Theory in Noncritical Dimensions (2009)
  • Author(s): N.Ishibashi
  • Organizer: APCTP Foucs Program on Current Trends in String Field The ory
  • Place of Presentation: APCTP
  • Year and Date: 2009-12-07
• [Presentation] Light-cone Gauge String Field Theory in Noncritical Dimensions (2009)
  • Author(s): N.Ishibashi
  • Organizer: APCTP Foucs Program on Current Trends in String Field Theory
  • Place of Presentation: APCTP(浦項,韓国)
  • Year and Date: 2009-12-07
• [Book] 弦の場の理論 (2012)
  • Author(s): 石橋延幸、村上公一
  • Total Pages: 174
  • Publisher: サイエンス社
• [Book] 弦の場の理論 (2012)
  • Author(s): 石橋 延幸
  • Total Pages: 174
  • Publisher: サイエンス社
• [Remarks]
  • URL: http://www-het.ph.tsukuba.ac.jp/~ishibash/index.html
• [Remarks] Nobuyuki Ishibashi's home page
  • URL: http://www-het.ph.tsukuba.ac.jp/~ishibash/index.html
• [Remarks]
  • URL: http://www-het.ph.tsukuba.ac.jp/~ishibash/index.html
• [Remarks] 研究成果に関するwebページ
  • URL: http://www-het.ph.tsukuba.ac.jp/~ishibash/index.html
• [Remarks]
  • URL: http://www-het.ph.tsukuba.ac.jp/~ishibash/index.html
• [Remarks]
  • URL: http://www-het.ph.tsukuba.ac.jp/~ishibash/index.html
• [Remarks]
  • URL: http://www-het.ph.tsukuba.ac.jp/~ishibash/index.html