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Setting Limits on Supersymmetry Using Simplified Models
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Published on: November 16, 2013

Off-shell structure of the string sigma model

Alan Kostelecky V1, Perry, Potting

  • 1Physics Department, Indiana University, Bloomington, Indiana 47405, USA.

Physical Review Letters
|September 16, 2000
PubMed
Summary
This summary is machine-generated.

Investigating the string sigma model reveals nonperturbative effects depend on regularization. A specific scheme matches Witten's string field theory, offering new insights into string theory. (33 words)

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Area of Science:

  • Theoretical Physics
  • String Theory
  • Quantum Field Theory

Background:

  • The string sigma model is a fundamental tool in string theory.
  • Understanding its off-shell structure is crucial for nonperturbative calculations.
  • Previous studies have highlighted the sensitivity of these calculations to regularization methods.

Purpose of the Study:

  • To investigate the off-shell structure of the string sigma model.
  • To explore the role of regularization schemes in nonperturbative effects.
  • To determine if a specific regularization scheme can reproduce known string field theory structures.

Main Methods:

  • Analysis of the open bosonic string sigma model.
  • Examination of nonperturbative effects.
  • Application and comparison of different regularization schemes, including one that retains string width.

Main Results:

  • Nonperturbative effects in the open bosonic string are highly dependent on the chosen regularization scheme.
  • A regularization scheme that incorporates the concept of string width successfully reproduces the structure of Witten's string field theory.
  • This suggests a potential connection between the off-shell structure and established string field theory formulations.

Conclusions:

  • The choice of regularization scheme is critical for understanding the off-shell behavior of the string sigma model.
  • A width-retaining regularization scheme provides a consistent framework that aligns with Witten's string field theory.
  • This work offers a pathway to further explore nonperturbative aspects of string theory.