Mixed quark-gluon condensate from instantons

Details Mixed quark-gluon condensate from instantons Mixed quark-gluon condensate from instantons

1996-07-04

arxiv.org/abs/hep-ph/9607244v1

Phys.Lett. B387 (1996) 841-847

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 p, LaTeX, 1 figure included using epsf

Scientific paper

10.1016/0370-2693(96)01098-2

We calculate the vacuum expectation value of the dimension-5 "mixed" quark-gluon operator, $O_\sigma = \bar\psi (\lambda^a /2) \sigma_{\mu\nu} \psi F_{\mu\nu}^a$, in the instanton vacuum. Within the $1/N_c$--expansion the QCD operator is replaced by an effective many-fermion operator, which is averaged over the effective theory of massive quarks derived from instantons. We find $m_0^2 \equiv \langle O_\sigma \rangle / \langle \bar\psi\psi \rangle \approx 4 \bar\rho^{-2} = 1.4 GeV^2$, somewhat larger than the estimate from QCD sum rules for the nucleon.

Affiliated with

Also associated with

No associations

Rating

Mixed quark-gluon condensate from instantons 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 Mixed quark-gluon condensate from instantons, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mixed quark-gluon condensate from instantons will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-81044