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Parity violating measurements of neutron densities - Jefferson Lab

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CREX and Atomic <strong>Parity</strong> Violation<br />

•Atomic parity violation<br />

depends on overlap <strong>of</strong> electrons<br />

with <strong>neutron</strong>s in nucleus.<br />

•Measurement <strong>of</strong> Rn in 208 Pb and<br />

48<br />

Ca constrains nuclear theory<br />

--> Rn for atomic parity nuclei.<br />

•Combine <strong>neutron</strong> radius from<br />

PV e scattering with an atomic<br />

parity exp for best low energy<br />

test <strong>of</strong> standard model.<br />

•Use atomic parity to measure<br />

<strong>neutron</strong> <strong>densities</strong>?<br />

Berkeley Yb exp.<br />

See talk by John Behr

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