We calculate the ratios E2/M1 and C2/M1 for the electroproduction of the (1232) in the region of photon virtuality 0 < -q 2 < 1 GeV 2 . The magnetic dipole amplitude M1 is also presented. The theory used is the chiral quark-soliton model, which is based on the instanton vacuum of the QCD. The calcul
Chiral constituent quark model predictions of electroproduction of the Δ on the nucleon and 3He
✍ Scribed by T.-S.H. Lee
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 468 KB
- Volume
- 629
- Category
- Article
- ISSN
- 0375-9474
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✦ Synopsis
We show that the phenomenological A isobar models can be related to the chiral constituent quark model. The parameters needed for predicting A dynamics in nuclei can therefore be determined, as has been done in a recent investigation of 7rN and 7N reactions. A preliminary prediction for SHe(e, e'A ++) reaction is presented for testing the A components in SHe predicted by an 87-channel Faddeev calculation for three-nucleon systems.
📜 SIMILAR VOLUMES
Based on a relativistic potential quark model approach for the nucleon and (1232), the electroproduction amplitudes of the (1232) resonance are calculated. The important effect of the pion meson cloud is stressed. Different predictions for helicity amplitudes and electroproduction amplitudes are obt
The spin-orbit (LS) force of the hyperon-nucleon interaction is studied in the chiral SU(3) quark model. The symmetric LS terms from the one gluon exchange (OGE) and the scalar nonet exchange (OSE) are taken into account. It is shown that two different treatments (the LS coupling from either OGE or