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Hard scattering and gauge/string duality.

Joseph Polchinski1, Matthew J Strassler

  • 1Institute for Theoretical Physics, University of California, Santa Barbara, California 93106-4030, USA.

Physical Review Letters
|January 22, 2002
PubMed
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High-energy glueball scattering in confining gauge theories exhibits hard scattering amplitudes due to warped geometry. This contrasts with typical soft scattering, revealing unique behaviors at small angles.

Area of Science:

  • High Energy Physics
  • String Theory
  • Quantum Field Theory

Background:

  • Confining gauge theories with supergravity duals describe glueball interactions.
  • Glueballs are composite particles made of gluons, the force carriers of the strong nuclear force.
  • Supergravity dualities provide a framework to study strongly coupled quantum field theories using weakly coupled string theory.

Purpose of the Study:

  • To investigate the high-energy fixed-angle scattering amplitudes of glueballs.
  • To understand the implications of warped geometry in supergravity duals on scattering processes.
  • To analyze the kinematic regimes and behaviors of scattering amplitudes at small angles.

Main Methods:

  • Employing the framework of supergravity duals to model confining gauge theories.

Related Experiment Videos

  • Analyzing scattering amplitudes within the effective description of string scattering.
  • Examining the consequences of warped geometry on the scattering process in an inertial frame.

    • Main Results:

    • Glueball scattering amplitudes are found to be hard, exhibiting power-law behavior.
    • The warped geometry of the dual theory prevents the string process from entering the soft regime in an inertial frame.
    • Both hard and Regge behaviors are observed in different kinematic regions at small angles.

    Conclusions:

    • The study reveals that high-energy glueball scattering in these theories is inherently hard due to geometric effects.
    • The findings highlight the non-trivial interplay between quantum field theory dynamics and gravitational geometry.
    • The analysis provides insights into the scattering properties of strongly coupled systems through their dual gravitational descriptions.