[Clascomment] OPT-IN:Direct Observation of Proton-Neutron Short-Range Correlation Dominance in Heavy Nuclei

[Sebastian Kuhn]

Nice paper. I have only one minor comment and a question:

Comment: At the end of the 2nd para, "...dominance of the tensor part of the nucleon-nucleon force AT SHORT DISTANCES" I would leave out "at short distances" or replace with "high relative momenta", since the tensor force is due to single-pion exchange and hence is not all that short-ranged (certainly not MORE short-ranged than the attractive force due to the sigma). That's just a pet peeve of mine...

Question: I am not familiar with the standard notation in the nuclear community, but I would think that your definition of MISSING momentum (end of 5th para) is backwards. In fact, it is the other way around than your definition of missing ENERGY. If that's true, than you are looking for a 2nd recoil nucleon with momentum close to the missing momentum, not back to back to it (see abstract) - that would make more intuitive sense to me. Also, I find it a bit confusing to talk (2nd sentence of abstract) about "missing momentum" right after introducing the reaction as A(e,e'pN) - I would specify "missing momentum of the leading proton" because otherwise someone could think it's the missing momentum even after accounting for all detected particles. 

Finally: Ref. 31 is somehow messed up (letter salad in the middle of the author list)