Nuclear photoeffect on three-particle nuclei

Electron and photon scattering on three-nucleon bound states

“…The squares are the data from [181], pluses from [182], and down triangles from [180]. [176] (squares), [177] (up triangles), [159] (down triangles), [178] (full up triangles), [173] (diamonds), [179] (crosses), [180] (x-es), [181] (full down), [183] (circles).…”

Photo-absorption sum rulesσ−1and further questions about correlations of constituents inside bound hadrons

“…Our objective in this section is to apply stronger charge symmetry (CS) requirements in derivation of the F-Kh-type sum rules. In accord with the CS-provisions for the mean values of the nucleon radii correlations in the mirror pair 3 H-and 3 He nuclei and the "self-conjugate" 4 He nucleus, we have get that the values of < D 2 >3 He , < D 2 >3 H , and r 2 ch 3 H can be expressed via one and the same linear combination of the introduced and undetermined parameters which is different from the analogues expression for r 2 ch 3 He . Taken at face value this means that with our stricter assumption on the underlying symmetry i.e.…”

“…e-mail: gerasb@theor.jinr.ru 2 The non-relativistic σ −1 sum rules for few-body nuclei Besides sum rules including the measurable physical quantities and obtained on the base of the current algebras and the p z → ∞ techniques, the similar sum rules ( but without the explicitly spin-dependent terms) were obtained in the non-relativistic (NR) nuclear physics context. In particular, the NR sum rules σ −1 for the s-shell nuclei (A = Z + N ≤ 4) were earlier obtained from the assumption that the ground-state wave function is symmetric in the space coordinates of nucleons [1], [2] for each nucleus of the isotopic doublet 3 H and 3 He and for 4 He…”

“…The present-day situation is that the accuracy of the theoretical results [3] is higher than the experimental uncertainties in the important energy range up to the pion production threshold [4] suggesting that new experimental data would be timely. The main objective of this section is a comparison of the Charge Independence (CI) and Charge Symmetry (CS) initial assumptions taken for the derivation of the σ −1 sum rules for the "mirror" 3 He -3 H and the "charge-self-conjugate" 4 He nuclei.…”

“…The main objective of this section is a comparison of the Charge Independence (CI) and Charge Symmetry (CS) initial assumptions taken for the derivation of the σ −1 sum rules for the "mirror" 3 He -3 H and the "charge-self-conjugate" 4 He nuclei. The validity of the Foldy [1] and Khokhlov [2] sum rules assumes validity of the (nucleon) charge independence (CI) symmetry.…”