[Clascomment] OPT-IN: New scaling measurements map the transition from single-particle to correlated-pair dominance in atomic nuclei

[Lawrence B. Weinstein]

Dear Mikhail,

Thank you!

In both the inclusive (e,e’) stair steps and our (e, e’p) work, the electron scatters from a single nucleon in the SRC pair.  The "step" occurs because the momentum distribution of the nucleon in the SRC pair and the momentum distribution of a nucleon in a deuteron are the same for large nucleon momentum.

I think that sometimes we use sloppy language and refer to electron scattering from a SRC pair, but in all cases, the electron scatters from a nucleon.

Thanks,
Larry

> On Jul 21, 2021, at 3:30 AM, Mikhail Osipenko <osipenko at ge.infn.it> wrote:
> 
> Dear Colleagues,
> 
> first of all my compliments for these new and very interesting findings.
> 
> The paper is well written, but I have one conceptual question:
> 
> I remember that the very first observation of scaling "stair steps" in inclusive (e,e') ratios at x>1 were explained by the elastic scattering of 2 and 3 nucleons bound in a SRC. Here you show that also (e,e'p) ratios exhibit (probably the same, at least in value) scaling in x. However, detecting "p" you require it to go along virtual photon. Also the large p_miss-q angles suggest scattering on a single "p". But elastic scattering off a 2N SRC and elastic scattering of a "p" in 2N SRC are two very different reactions. Does this new interpretation contradict to the inclusive one?
> 
> Best Regards,
>                 Mikhail.

Lawrence B. Weinstein
University Professor and Eminent Scholar
Physics Dept
Old Dominion University
Norfolk, VA 23529
weinstei at jlab.org
757 683 5803