Measurement of the Charged Pion Form Factor at EIC - Garth Huber
Measurement of the Charged Pion Form Factor at EIC - Garth Huber
Measurement of the Charged Pion Form Factor at EIC - Garth Huber
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Isol<strong>at</strong>ing σ L with Polariz<strong>at</strong>ion D.O.F<br />
σ pol ∼ P e P p<br />
√<br />
(1 − ɛ2 )A z<br />
Nominal, high energies, ε very close to 1.0 destroys<br />
figure <strong>of</strong> merit for this technique √<br />
If we can adjust ε to 0.9 <strong>the</strong>n (1 − ɛ2 ) → 0.44<br />
√<br />
ε= 0.95 (1 − ɛ2 ) → 0.31<br />
Example: At Q 2 = 5, lowest s <strong>of</strong> 3 GeV e- on 20 GeV p<br />
results in <strong>the</strong> smallest ε=0.947 (for which neutron is still<br />
easily detectable)<br />
Additional issue: A z = component <strong>of</strong> p polariz<strong>at</strong>ion parallel<br />
to q proton polariz<strong>at</strong>ion direction ideally tunable <strong>at</strong> IP
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