Mon·Mar 23, 2015Monday·March 23, 2015

1. 01*

   Investigation of $K^{bar}NN$ resonances with a coupled-channel Complex Scaling Method + Feshbach projection

   Akinobu Doté🇯🇵 · Takashi Inoue🇯🇵 · Takayuki Myo🇯🇵

   We have investigated a prototype of kaonic nuclei, "$K^{-}pp$", with a coupled-channel Complex Scaling Method (ccCSM). Combining the ccCSM with Feshbach projection method, we can handle a coupled-channel problem effectively as a single-channel problem. By using an energy-dependent chiral SU(3)-based $\bar{K}N$ potential, the $K^{-}pp$ ($J^{\pi }=0^{-}$ and $T=1/2$) is obtained to be shallowly bound with the binding energy of 20-30 MeV. The mesonic decay width depends on the interaction parameters and ansatz; the decay width is ranging from 20 to 65 MeV. In case of $J^{\pi }=1^{-}$ state, no three-body $\bar{K}NN$ resonant states are found.

   ↳ nucl-thnucl-exHyperfine Interact.(2015)·2 citations
2. 02*

   Extracting the Mass Dependence and Quantum Numbers of Short-Range Correlated Pairs from A(e,e'p) and A(e,e'pp) Scattering

   C. Colle🇧🇪 · O. Hen🇮🇱 · W. Cosyn🇧🇪 · I. Korover🇮🇱 · E. Piasetzky🇮🇱 · J. Ryckebusch🇧🇪 · L.B. Weinstein🇺🇸

   The nuclear mass dependence of the number of short-range correlated (SRC) proton-proton (pp) and proton-neutron (pn) pairs in nuclei is a sensitive probe of the dynamics of short-range pairs in the ground state of atomic nuclei. This work presents an analysis of electroinduced single-proton and two-proton knockout measurements off 12C, 27Al, 56Fe, and 208Pb in kinematics dominated by scattering off SRC pairs. The nuclear mass dependence of the observed A(e,e'pp)/12C(e,e'pp) cross-section ratios and the extracted number of pp- and pn-SRC pairs are much softer than the mass dependence of the total number of possible pairs. This is in agreement with a physical picture of SRC affecting predominantly nucleon-nucleon pairs in a nodeless relative-S state of the mean-field basis.

   ↳ nucl-thnucl-exPRC(2015)·63 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.