[Deeppwg] Fwd: Abstract for Santa Fe APS/DNP Meeting

[Keith Griffioen]

Dear DPWG members,

Please review the following abstract and send Nathan comments.  This work was recently presented at the DPWG meeting.  We will assume that all the plots will be labeled PRELIMINARY.

Thanks,
Keith
DPWG

> Begin forwarded message:
> 
> From: Nathan Harrison <harrison at phys.uconn.edu>
> Subject: Abstract for Santa Fe APS/DNP Meeting
> Date: June 30, 2015 at 10:56:01 AM EDT
> To: Keith Griffioen <griff at jlab.org>
> Cc: Kyungseon Joo <kjoo at phys.uconn.edu>
> 
> Dear Keith,
> 
> I would like to submit an abstract for the APS/DNP meeting in Santa Fe. Could you distribute this draft to the DPWG to see if there are any comments?
> 
> Measurements of the cos\phi and cos2\phi moments of the semi-inclusive deep inelastic scattering (SIDIS) cross-section were performed. The data set used was the E1-f run from the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab which ran in 2003. The run used a 5.498 GeV longitudinally polarized electron beam and an unpolarized liquid hydrogen target. Two pion channels (\pi+ and \pi-) were studied over a broad kinematical range (x = 0.1 - 0.6, Q^2 = 1.0 - 4.5 GeV^2, z = 0.0 - 1.0, and P_T = 0.0 - 1.0 GeV). These measurements give insights into the transverse momentum dependence of parton distribution functions (PDFs) which describe the dynamics of quarks and gluons inside of the proton. This may give access to the quark orbital angular momentum contribution to the proton spin.
> 
> Thanks.
> 
> Best Regards,
> Nathan

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