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Scattering Massive String Resonances through Field-Theory Methods.

Max Guillen1, Henrik Johansson1,2, Renann Lipinski Jusinskas3

  • 1Department of Physics and Astronomy, Uppsala University, Box 516, 75120 Uppsala, Sweden.

Physical Review Letters
|August 16, 2021
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Summary
This summary is machine-generated.

We developed a new method to compute string tree-level amplitudes with massive and massless states. This technique uses the twisted heterotic string to simplify calculations for various superstring theories.

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Area of Science:

  • High-energy physics
  • String theory
  • Quantum gravity

Background:

  • String theory describes fundamental particles and forces.
  • Calculating scattering amplitudes is crucial for understanding quantum gravity.
  • Previous methods faced challenges with massive states in superstring amplitudes.

Purpose of the Study:

  • To develop an exact method for computing string tree-level amplitudes.
  • To handle amplitudes with one massive state and any number of massless states.
  • To simplify calculations within the framework of the twisted heterotic string.

Main Methods:

  • Utilizing the twisted heterotic string with a simplified spectrum.
  • Employing Berends-Giele currents of the gauge multiplet.
  • Mapping integrands to gravitational and massive amplitudes.

Main Results:

  • An explicit computation method for string tree-level amplitudes with one massive state.
  • The method is exact in α^{'} (alpha prime).
  • Successful mapping to amplitudes in type-I and type-II superstrings.

Conclusions:

  • The presented method offers an efficient way to compute complex string amplitudes.
  • This work provides a simplified model for studying massive states in superstrings.
  • The findings facilitate further research in quantum gravity and string phenomenology.