Dynamics of Baryons from String Theory and Vector Dominance

Details Dynamics of Baryons from String Theory and Vector Dominance Dynamics of Baryons from String Theory and Vector Dominance

2007-05-18

arxiv.org/abs/0705.2632v3

JHEP0709:063,2007

Physics

High Energy Physics

High Energy Physics - Theory

65pages, 3 figures, vector mesons and axial-vector mesons are now canonically normalized (comparisons with data and conclusion

Scientific paper

10.1088/1126-6708/2007/09/063

We consider a holographic model of QCD from string theory, a la Sakai and Sugimoto, and study baryons. In this model, mesons are collectively realized as a five-dimensional \$U(N_F)=U(1)\times SU(N_F)$ Yang-Mills field and baryons are classically identified as $SU(N_F)$ solitons with a unit Pontryagin number and $N_c$ electric charges. The soliton is shown to be very small in the large 't Hooft coupling limit, allowing us to introduce an effective field ${\cal B}$. Its coupling to the mesons are dictated by the soliton structure, and consists of a direct magnetic coupling to the $SU(N_F)$ field strength as well as a minimal coupling to the $U(N_F)$ gauge field. Upon the dimensional reduction, this effective action reproduces all interaction terms between nucleons and an infinite tower of mesons in a manner consistent with the large $N_c$ expansion. We further find that all electromagnetic interactions, as inferred from the same effective action via a holographic prescription, are mediated by an infinite tower of vector mesons, rendering the baryon electromagnetic form factors completely vector-dominated as well. We estimate nucleon-meson couplings and also the anomalous magnetic moments, which compare well with nature.

Affiliated with

Also associated with

No associations

Rating

Dynamics of Baryons from String Theory and Vector Dominance 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 Dynamics of Baryons from String Theory and Vector Dominance, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamics of Baryons from String Theory and Vector Dominance will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-438571