English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The two-nucleon momentum distributions have been calculated for nuclei up toA=40 and various values of the relative and center-of-mass momenta and anglebetween them. For complex nuclei a parameter-free linked-cluster expansion,based upon a realistic local two-nucleon interaction of the Argonne family andvariational wave function featuring central, tensor, spin and iso-spincorrelations, has been used. The obtained results show that: 1) independentlyof the mass number A, at values of the relative momentum k_rel> 2 fm^{-1} theproton-neutron momentum distributions for back-to-back (BB) nucleons (K_cm=0)exhibit the factorization property n_A^{pn}(k_rel,K_cm=0)=C_A^{pn} n_D(k_rel)n_{cm}^{pn}(K_cm=0), where n_D is the deuteron momentum distribution,n_{cm}^{pn}(K_{cm}=0) the momentum distribution of the c.m. motion of the pairand C_A^{pn} the nuclear contact measuring the number of BB pn pairs withdeuteron-like momenta; 2) the values of the proton-neutron nuclear contactC_A^{pn} are obtained in a model-independent way from the ration_A^{pn}(k_rel,K_cm=0)/n_D(k_rel) n_{cm}^{pn}(K_cm=0); 3) also theK_cm-integrated pn momentum distributions divided by the deuteron momentumdistribution exhibits a constant behavior equal to C_A^{pn}, but only at veryhigh values of k_{rel}> 3.5fm^{-1}, where the relative momentum distribution isentirely governed by BB short-range correlated nucleons; 4) the absolute valueof the number of pn and pp short-range correlated pairs is calculated,illustrating that the high values (K_cm>1 fm^{-1}) of the pair c.m. momentumappreciably reduce the dominance of the pn over pp pairs produced by the tensorforce when K_cm=0; 5) calculations are in good agreement with the VMCcalculations for light nuclei and with available experimental on the processesA(e,e'pn)X and A(e,e'pp)X.

physical review. c

Universality of nucleon-nucleon short-range correlations: the  factorization property of the nuclear wave function, the relative and  center-of-mass momentum distributions, and the nuclear contacts