DVCS at 6/12 GeV, and ideas for the EIC
DVCS at 6/12 GeV, and ideas for the EIC
DVCS at 6/12 GeV, and ideas for the EIC
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Introduction Initial results Dedic<strong>at</strong>ed experiments Future 6 <strong>GeV</strong> <strong>12</strong> <strong>GeV</strong> <strong>EIC</strong> Conclusion<br />
Hall-A program<br />
Neutron <strong>DVCS</strong> off a 3 He target<br />
⃗n(⃗e, e ′ γ)n via 3 ⃗ He(⃗e, e)X<br />
◮ Long or Trans normal polariz<strong>at</strong>ion<br />
◮ Target single spin cross sections<br />
◮ dσ ∼ sin ϕ (twist-2): Im[BH·<strong>DVCS</strong>]<br />
◮ Unpolarized protons in 3 He cancel<br />
◮ Target double spin<br />
◮ dσ ∼ c0 + c 1 cos ϕ: Re[BH 2 +(BH·<strong>DVCS</strong>)+<strong>DVCS</strong> 2 ]<br />
◮ Unpolarized protons cancel<br />
◮ Transverse sideways: sin ϕ → cos ϕ<br />
◮ All o<strong>the</strong>r “neutron” observables (total σ, beam-spin) have<br />
large incoherent proton contributions<br />
Carlos Muñoz Camacho<br />
LPC Clermont-Ferr<strong>and</strong>, CNRS/IN2P3<br />
<strong>DVCS</strong> <strong>at</strong> 6/<strong>12</strong> <strong>GeV</strong> <strong>and</strong> <strong>ideas</strong> <strong>for</strong> <strong>EIC</strong> 23
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