[Clascomment] OPT-IN: Tensor Correlations Measured in 3He(e,e′ pp)n

Larry Weinstein weinstei at jlab.org
Tue Jul 27 13:50:16 EDT 2010


Dear Dan,

Either spelling of paramet{e}rization appears to be acceptable:
http://mw4.merriam-webster.com/dictionary/parametrization
For purely idiosyncratic reasons, I prefer the version without the 'e'.

We actually modeled (at least kinematically) the effect of virtual
photon absorption on the struck nucleon, followed by pion emission, with
the pion absorbed by the other two nucleons. That process fails to
describe the data for two reasons:
1) it leads to a very different virtual photon distribution that that
seen in the data (ie: it is not centered around x=1)
2) it gives a minimum relative pair momentum of p_rel = 350 MeV/c,
constrasting with the observed minimum of p_rel = 250.

Daniel Watts wrote:
 > Hi,
 >
 > Very nice paper. Only a couple of minor comments
 >
 > p2 3rd para: parametrization -> parameterization
 > p2 4th para: 4-cm vertex cuts-> this confused me initially as i read 
it as 4 centre of mass vertex cuts - maybe that\'s just me though!
 >
 > I take it that the three-body currents are not those involving a 
close to on-shell intermediate meson i.e. it is not worthwhile to look 
for the invariant mass of the exchanged on-shell meson from the leading 
proton and virtual photon 4-vector?
 >
 > Best wishes,
 > Dan Watts.
 >
 >
 >

-- 
Sincerely,
Larry

-----------------------------------------------------------
Lawrence Weinstein
University Professor
Physics Department
Old Dominion University
Norfolk, VA 23529
757 683 5803
757 683 3038 (fax)
weinstein at odu.edu
http://www.lions.odu.edu/~lweinste/



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