γ* N --> Δ at JLab: Exploring the High Q2 Regime

Details γ* N --> Δ at JLab: Exploring the High Q2 Regime γ* N --> Δ at JLab: Exploring the High Q2 Regime

Apr 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aipc..904..232u&link_type=abstract

SHAPES OF HADRONS. AIP Conference Proceedings, Volume 904, pp. 232-241 (2007).

Physics

1

Meson Production, Electromagnetic Form Factors, Baryon Resonances With S=0

Scientific paper

We report a new measurement of the exclusive electroproduction reaction γ* p --> π0 p to explore the evolution from soft non-perturbative physics to hard processes via the Q2 dependence of the magnetic (M1+), electric (E1+) and scalar (S1+) multipoles in the N --> Δ transition. 9000 differential cross section data points cover W from threshold to 1.4 GeV/c2, 4π center-of-mass solid angle, and Q2 from 3 to 6 GeV2/c2, the highest yet achieved. It is found that the magnetic form factor GM* decreases with Q2 more steeply than the proton magnetic form factor, the ratio E1+/M1+ is small and negative, indicating strong helicity non-conservation, and the ratio S1+/M1+ is negative, while its magnitude increases with Q2.

Affiliated with

Also associated with

No associations

Rating

γ* N --> Δ at JLab: Exploring the High Q2 Regime 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 γ* N --> Δ at JLab: Exploring the High Q2 Regime, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and γ* N --> Δ at JLab: Exploring the High Q2 Regime will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1682217