Help -- Writing Lagrangian in different Representations

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SUMMARY

The discussion focuses on writing the Lagrangian for a model utilizing the SU(3) 10-plet representation, which includes exotic fermions not present in the Standard Model (SM). The user is familiar with the SU(3) Lagrangian in terms of the 3 and 3* representations and seeks guidance on formulating the Lagrangian for their specific model. The provided formula is \(\mathcal{L} = i \bar{[10]} \gamma^{\mu} \partial_{\mu} [10]\), indicating the kinetic term for the exotic fermions. The discussion highlights a need for resources on writing Lagrangians in various representations.

PREREQUISITES
  • Understanding of SU(3) group theory
  • Familiarity with Lagrangian mechanics
  • Knowledge of fermionic fields and their representations
  • Basic grasp of quantum field theory concepts
NEXT STEPS
  • Research the construction of Lagrangians for non-standard representations in quantum field theory
  • Study the implications of exotic fermions in SU(3) models
  • Explore resources on writing Lagrangians for higher-dimensional representations
  • Investigate the role of gauge symmetries in formulating Lagrangians
USEFUL FOR

This discussion is beneficial for theoretical physicists, particularly those working in particle physics, quantum field theory, and model building involving non-standard fermionic representations.

Karatechop250
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Okay, so I am trying to understand on how to write Lagrangian in different representations. I know the formula of the SU(3) lagrangian in terms of the 3 and 3* rep. Now presume I have a model in the SU(3) 10 plet rep which includes exotic fermions not in the SM. How would I write out the lagrangian for this new model ? Does anyone know of any sources on writing lagrangians in different representations.
 
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Thanks for the post! Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
 
Karatechop250 said:
Okay, so I am trying to understand on how to write Lagrangian in different representations. I know the formula of the SU(3) lagrangian in terms of the 3 and 3* rep. Now presume I have a model in the SU(3) 10 plet rep which includes exotic fermions not in the SM. How would I write out the lagrangian for this new model ? Does anyone know of any sources on writing lagrangians in different representations.
What are these fermions?
\mathcal{ L } = i \bar{ [ 10 ] } \gamma^{ \mu } \partial_{ \mu } [ 10 ]
 

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