Three point amplitudes in matrix theory

Dec 19, 2023
18 pages
Published in:
  • J.Phys.A 57 (2024) 16, 165401
  • Published: Apr 4, 2024
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Abstract: (IOP)
We compute the three graviton amplitude in the Banks-Fischler-Shenker-Susskind matrix model for M-theory. Even though the three point amplitude is determined by super Poincare invariance in eleven dimensional M-theory, it requires a non-trivial computation in the matrix model. We consider a configuration where all three gravitons carry non-zero longitudinal momentum. To simplify the problem, we compactify one additional dimension and relate the amplitude to a supersymmetric index computation. We find agreement with the expected answer even at finite values of N.
Note:
  • 18 pages plus appendices, 5 figures. v2: typos corrected. v3: computed and matched the overall numerical coefficient
  • M-theory
  • string theory
  • scattering amplitudes
  • 3-point amplitudes
  • dimension: 11
  • matrix model
  • graviton
  • gravitation
  • M-theory
  • Poincare