String coupling and interactions in type IIB matrix model - PowerPoint PPT Presentation

Nov 25, 2022 •341 likes •398 views

String coupling and interactions in type IIB matrix model arXiv:0812.3460[hep-th] Satoshi Nagaoka (KEK) with Yoshihisa Kitazawa (KEK & Sokendai) ``Towards New Developments in Field and String Theories at RIKEN/December 20 2008 IIB

String coupling and interactions in type IIB matrix model arXiv:0812.3460[hep-th] Satoshi Nagaoka (KEK) with Yoshihisa Kitazawa (KEK & Sokendai) ``Towards New Developments in Field and String Theories ’’ at RIKEN/December 20 2008
IIB matrix model as a nonperturbative formulation of superstring theory [Ishibashi-Kawai-Kitazawa-Tsuchiya ’96] A µ : N × N Hermitian matrices ψ : Ten dimensional Majorana-Weyl spinor, N × N matrices • Higher dimensional objects are constructed as the solutions of IIB matrix model. • This model will describe not only perturbative Yang-Mills theories, but perturbative superstring theory. • We focus on the two dimensional noncommutative background in IIB matrix model.
2D Yang-Mills as a nonperturbative formulation of superstring theory Matrix string theory [Dijkgraaf-Verlinde-Verlinde ’97] • N=8 SUSY, N × N matrices 8 scalar fields, 8 × 2 spinor fields • Various descriptions are related to each other in 2 dim: Free orbifold CFT, dual IIB supergravity description, perturbative YM description, … depending on N, g YM
Perturbative interactions of strings The basic perturbative interactions of the closed strings are the recombination between two intersecting strings. Locally seeing, recombination : local process We realize this process in IIB matrix model. String coupling g s is identified in IIB matrix model.
Plan of talk ＆ summary 1.Derivation of Green-Schwarz string action (identification of α ` in IIB matrix model) [arxiv:07081077] 2.Recombination (identification of g s in IIB matrix model) [arxiv:0812.3460] 2-1. Effective action of intersecting strings in IIB matrix model 2-2. Fluctuation analysis and the recombination 2-3. Recombination probability 2-4. Recombination in matrix string theory 3.Superstring vertex operators (derivation of SUSY trf.) [arxiv:0710.0709]

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