Sum rules in the CFL phase of QCD at finite density
Abstract
We study the asymmetry between the vector current and axialvector current correlators in the colourflavour locking (CFL) phase of QCD at finite density. Using Weinberg's sum rules, we compute the decay constant f_{π} of the Goldstone modes and find agreement with previous derivations. Using Das's sum rule, we also estimate the contribution of electromagnetic interactions to the mass of the charged modes. Finally, we comment on low temperature corrections to the effective field theory describing the Goldstone bosons.
 Publication:

Physics Letters B
 Pub Date:
 March 2001
 DOI:
 10.1016/S03702693(01)001265
 arXiv:
 arXiv:hepph/0010274
 Bibcode:
 2001PhLB..501..200M
 Keywords:

 High Energy Physics  Phenomenology;
 Nuclear Theory
 EPrint:
 13 pages, revtex, using epsfig. Typo in reference corrected