View source for DVCS 2 (Obsolete)


The DVCS2 experiments at Jefferson Lab (LH2: E07-007, [http://hallaweb.jlab.org/experiment/DVCS/documents/phys_prog/E07007_proposal.pdf], LD2: E08-025 [http://hallaweb.jlab.org/collab/PAC/PAC33/PR-08-025:nDVCS.pdf]) will measure the absolute cross sections of electro-production of photons in the deep exclusive regime  as part of the GPD program. These experiments build on the success of our first round of data taking  ([http://www.slac.stanford.edu/spires/find/hep/www?key=6856306], [http://www.slac.stanford.edu/spires/find/hep/www?irn=7325622]). DVCS cross sections will be measured  at fixed Q<sup>2</sup>, x<sub>Bj</sub> and three different beam energies. The kinematic structure of the ep→ epγ cross section will allow to separate the different amplitudes contributing to the total cross section (eg. BH*DVCS interference from the pure |DVCS|<sup>2</sup>  term) at all three Q<sup>2</sup> values of the previous experiments. We will use these data to perform a  Rosenbluth L/T separations of the ep→ epπ<sup>0</sup> cross section. This π<sup>0</sup> result  is crucial to test if factorization in this channel can be obtained at these energies. The basic experimental setup  elements of the experiments are the dedicated EM calorimeter that is used to detect the photon and  the left Hall A HRS that is used to detect the scattered electron. The upcoming data taking is scheduled from September 27, 2010 to December 23, 2010.

'''News:''' The [http://hallaweb.jlab.org/experiment/DVCS/dvcs2-shifts shift schedule] is now online and open for shift sign-up.
<table align="left" cellpadding="3">
<tr><td bgcolor="#e0e0f0">'''Contents'''</td></tr>
<tr><td bgcolor="#e0e0f0">[[Shift safety documents]]</td></tr>
<tr><td bgcolor="#e0e0f0">[[People]]</td></tr>
<tr><td bgcolor="#e0e0f0">[[DVCS how to]]</td></tr>
<tr><td bgcolor="#e0e0f0">[[Things cryotarget operators should know]]</td></tr>
<tr><td bgcolor="#e0e0f0">[http://www.jlab.org/~adaq/halog/html/logdir.html[HALOG]]</td></tr>
<tr><td bgcolor="#e0e0f0">[https://hallaweb.jlab.org/dvcslog/DVCS2/[ELOG]]</td></tr>
<tr><td bgcolor="#e0e0f0">[http://hallaweb.jlab.org/experiment/DVCS/[The DVCS/Hall A web page]]</td></tr>
<tr><td bgcolor="#e0e0f0">[https://hallaweb.jlab.org/wiki/images/7/79/DVCS2_Runplan_August25_2010.pdf [Global Run Plan]]</td></tr>
<tr><td bgcolor="#e0e0f0">[[Daily Run Plan ]]</td></tr>
<tr><td bgcolor="#e0e0f0">[[Online analysis: results and TODO]]</td></tr>
<tr><td bgcolor="#e0e0f0">'''Pre beam activities (mostly summer 2010)'''</td></tr>
<tr><td bgcolor="#e0e0f0">[[DVCS weekly meetings, Summer 2010]]</td></tr>
<tr><td bgcolor="#e0e0f0">[[DVCS TO DO list, Summer 2010]]</td></tr>
<tr><td bgcolor="#e0e0f0">[[Pending issues]]</td></tr>
<tr><td bgcolor="#e0e0f0">[[Task assignement]]</td></tr>
<tr><td bgcolor="#e0e0f0">[[Setup as installed]]</td></tr>
<tr><td bgcolor="#e0e0f0">[[DVCS DAQ HRS setup]]</td></tr>
<tr><td bgcolor="#e0e0f0">[[Survey reports]]</td></tr>
</table>