Q^2-Dependence of the Drell-Hearn-Gerasimov integral

Details Q^2-Dependence of the Drell-Hearn-Gerasimov integral Q^2-Dependence of the Drell-Hearn-Gerasimov integral

1999-05-04

arxiv.org/abs/nucl-th/9905004v1

Eur.Phys.J. A6 (1999) 211-214

Physics

Nuclear Physics

Nuclear Theory

8 pages, 3 figures, revtex

Scientific paper

The energy and four-momentum (Q^2) dependence of the photo-absorption cross section on the proton is calculated for helicity -1/2 and -3/2 states. An effective Lagrangian model is used, formulated in terms of meson and baryon degrees of freedom, which obeys crossing symmetry, unitarity, Lorentz and gauge invariance. The difference in the cross sections for the two helicity states, the Drell-Hearn-Gerasimov integral $I_{DHG}(Q^2)$, is evaluated at different $Q^2$. We find that at small momentum transfer the absolute value of $I_{DHG}(Q^2)$ first increases to reach a maximum at $Q^2 \approx 0.05 GeV^2$ before decreasing at higher $Q^2$.

Affiliated with

Also associated with

No associations

Rating

Q^2-Dependence of the Drell-Hearn-Gerasimov integral 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 Q^2-Dependence of the Drell-Hearn-Gerasimov integral, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Q^2-Dependence of the Drell-Hearn-Gerasimov integral will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-258157