Be careful, Mainz and Bonn are running with polarized beam, target and recoil for the last year. The data exist and are being analyzed as we speak. Currently, we are taking double polarization using polarized deuterium to provide the polarized neutron. Double polarization parameters from both places have been shown at conferences. I would word things a little differently.<br>
<br>Bill<br><br><div class="gmail_quote">On Thu, Jun 30, 2011 at 12:18 AM, John Price <<a href="mailto:jprice@csudh.edu">jprice@csudh.edu</a>> wrote:<br><blockquote class="gmail_quote">
Hi Brian:<br>
<br>
Your statement that "...there are no previous measurements for double<br>
polarization observables" desperately needs to be preceded by a<br>
statement of exactly what process you're talking about. CLAS has<br>
published several double polarization observables in multiple reactions<br>
over the years, as have (I suspect) several other facilities. I would<br>
suggest rewording the second sentence as<br>
<br>
"In the eta photoproduction process on the proton, there are relatively<br>
few single polarization measurements, compared to unpolarized<br>
differential cross section measurements, and no double polarization<br>
measurements." Some wordsmithing is still needed there.<br>
<br>
John<br>
<br>
--<br>
John W. Price<br>
Professor and Chair of Physics<br>
CSU Dominguez Hills<br>
310-243-3403<br>
<br>
_______________________________________________<br>
Clas_hadron mailing list<br>
<a href="mailto:Clas_hadron@jlab.org">Clas_hadron@jlab.org</a><br>
<a href="https://mailman.jlab.org/mailman/listinfo/clas_hadron">https://mailman.jlab.org/mailman/listinfo/clas_hadron</a><br>
</blockquote></div><br><br clear="all"><br>-- <br>William J. Briscoe<br>Department of Physics<br>The George Washington University<br>Director, Center for Nuclear Studies<br>Director, Data Analysis Center<br>202-994-6788 (Foggy Bottom Campus)<br>
703-726-8340 (Virginia Science and Technology Campus)<br><br>