2020/09/02 by M. Takechi, Takechi, Maya, Shingo Tagami Jun Matsui +4
Physics and Astronomy · #FOS: Physical sciences #High-Energy Particle Collisions Research #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th) #Nuclear physics research studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2009.00796
openalex publication_date 2020/09/02 · openalex created_date 2020/09/08 · openalex updated_date 2026/07/28
In the previous paper, we predicted reaction cross sections σ\rm R for 40-60,62,64Ca+12C scattering at 280~MeV/nucleon, since Tanaka \it el al. measured interaction cross sections σ\rm I for 42-51Ca in RIKEN and determined neutron skin r\rm skin(\rm RIKEN) using the optical limit of the Glauber model with the Woos-Saxon densities. Our purpose is to reanalyze the r\rm skin from the σ\rm I. Our analysis is superior to theirs, since the chiral g-matrix folding model (the GHFB and GHFB+AMP densities) is much better than the optical limit of the Glauber model (the Woos-Saxon densities). Our model is the chiral g-matrix folding model with the densities scaled from the GHFB and GHFB+AMP densities. We scale the GHFB and GHFB+AMP densities so that the σ\rm R of the scaled densities can agree with the central values of σ\rm I under the condition that the proton radius of the scaled proton density equals the data determined from the isotope shift based on the electron scattering. The r\rm skin thus determined are close to their results r\rm skin42-51(\rm RIKEN). For 48Ca, our value r\rm skin48 is 0.105 ± 0.06~fm, while their value is r\rm m48(\rm RIKEN)=0.146 ± 0.06~fm. We take the weighted mean and its error of r\rm skin48(σ\rm I)= 0.105 ± 0.06~fm and r\rm skin48(E1\rm pE) =0.17 ± 0.03~fm of the high-resolution E1 polarizability experiment (E1\rm pE). Our final result is r\rm skin48=0.157 ± 0.027~fm. Our conclusion is r\rm skin48=0.157 ± 0.027~fm for 48Ca. For 42-47,49-51Ca, our results on r\rm skin are similar to theirs. Our result for 48Ca is related to CREX.