Massive particles in D-brane models ?

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SUMMARY

The discussion centers on the mechanism by which parallel D-branes give mass to particles corresponding to strings stretched between them. At zero separation, open string modes are massless due to zero length, while non-zero separation results in massive modes because of the string tension. This phenomenon is analogous to the Higgs mechanism, where a scalar field's vacuum expectation value (vev) breaks gauge symmetry, leading to mass acquisition by gauge bosons.

PREREQUISITES
  • Understanding of D-brane physics
  • Familiarity with string theory concepts
  • Knowledge of the Higgs mechanism
  • Basic grasp of gauge symmetry and scalar fields
NEXT STEPS
  • Research the role of D-branes in string theory
  • Explore the Higgs mechanism in detail
  • Study the implications of vacuum expectation values (vev) in field theory
  • Investigate the relationship between string tension and particle mass
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The discussion is beneficial for theoretical physicists, string theorists, and researchers exploring the intersection of particle physics and string theory, particularly those interested in mass generation mechanisms in high-energy physics.

Dilatino
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How does a zero separation of parallel D-branes give mass to the particles that correspond to strings stretched between them?

Is there a scalar field corresponding to the separation of the D-branes which takes the role of a higgs field, or how does it work?
 
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Parallel D-branes have modes that correspond to strings stretched between the branes.

At zero separation, these open string modes are massless, because the strings have zero length.

At non-zero separation, these modes become massive, because the strings have nonzero length (and the string tension is a constant).

This is directly analogous to the Higgs mechanism. In the worldvolume theory on the branes, it corresponds to breaking gauge symmetry due to a vev of a scalar field, and the gauge boson acquiring a mass.
 
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