The Story of \cal O: Positivity constraints in effective field theories

Details The Story of \cal O: Positivity constraints in effective field theories The Story of \cal O: Positivity constraints in effective field theories

2006-09-22

arxiv.org/abs/hep-th/0609159v1

Physics

High Energy Physics

High Energy Physics - Theory

11 pages, no figures, revtex4

Scientific paper

We propose a simple method for identifying operators in effective field theories whose coefficients must be positive by causality. We also attempt to clarify the relationship between diverse positivity arguments that have appeared in the literature. We conjecture that the superluminal perturbations identified in non-positive effective theories are generally connected to instabilities that develop near the cutoff scale. We discuss implications for the ghost condensate, the chiral Lagrangian, and the Goldstone bosons of theories with spontaneous Lorentz violation.

Affiliated with

Also associated with

No associations

Rating

The Story of \cal O: Positivity constraints in effective field theories does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The Story of \cal O: Positivity constraints in effective field theories, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Story of \cal O: Positivity constraints in effective field theories will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-659530