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Thank you to all of those who RSVP'd. See you at noon today.<br>
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<span style="font-size: 12pt; line-height: 115%;">Please RSVP to: <a
moz-do-not-send="true" href="mailto:patient@jlab.org">patient@jlab.org</a>
by COB on April 16, 2012.</span><span style="font-size: 12pt;
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font-family: "Times New Roman","serif";">
Wednesday, April 18, 2012</span><br>
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"Times New Roman","serif";"></span></div>
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font-family: "Times New Roman","serif";">
<b><span style="color: red;">***CC F113***</span></b></span><br>
12:00 - 1:00 p.m.<br>
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"Times New Roman","serif";"></span></div>
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<div align="left"><b style=""><span style="font-size: 17pt;
font-family: CMBX12;"> The g2p experiment</span></b><span
style="font-size: 17pt; font-family: CMBX12;"> </span></div>
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<h1 align="left"><b style=""><span style="font-size: 12pt;
font-family: CMR12;">
Karl Slifer</span></b></h1>
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<span style="font-size: 12pt; font-family: CMR12;">
University of New Hampshire</span>
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center; line-height: normal;" align="center"><span
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Abstract:<br>
JLab is the world’s premiere facility to study nucleon structure. As
the<br>
result of a dedicated experimental program, the inclusive nucleon
structure<br>
functions have been well determined, with the exception being gp<br>
2 which is relatively unknown. The g2p experiment aims to address
this with a mea-<br>
surement of polarized inclusive electron scattering at low momentum
transfer.<br>
This data is needed to clarify the failure of chiral perturbation
theory to re-<br>
produce the nucleon spin polarizabilities. But a precise
determination of gp<br>
2 is also critical for a full understanding of the simplest bound
atomic systems.<br>
Proton structure contributes a significant correction to atomic
energy levels.<br>
These corrections are dominated by the contribution from very low
Q2, and<br>
affect a range of Q.E.D. calculations; from hyperfine splitting to
extractions<br>
of the proton charge radius.<br>
After a string of mechanical and design setbacks, the g2p experiment
has<br>
completed its first production measurement at Q2 = 0.06 GeV2. We
will dis-<br>
cuss the physics motivation, technical challenges, and show some
preliminary<br>
results.<br>
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