Wednesday, May 20, 2009

Jorge Piekarewicz: The Nuclear Physics of the Neutron Star Crust

Jorge started with a description of the correlation between neutron skin and pressure of pure neutron matter which then effects the neutron star radius. Then mentioned the PREX experiment wanted to clarify that it is not lead on lead, but a slight tap from an electroweak probe.

Also, mentioned the Garvey-Kelson Mass Relations which has very general assumptions but seems to work extraordinarily well. More general and robust than expected hinges on smoothness of M(N,Z).

Finally, Jorge was trying to understand if nuclear pasta is robust or model dependent. Do we have to go through pasta or is there another possibility? His work showed that there is no pasta formation if there are no long range forces or if neutron skin is large.

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