2011

Parity-violating neutron spin rotation in hydrogen and deuterium

Griesshammer, Harald W., Schindler, Matthias R., Springer, Roxanne P.

Understand

We calculate the (parity-violating) spin rotation angle of a polarized neutron beam through hydrogen and deuterium targets, using pionless effective field theory up to next-to-leading order.

  • Our result is part of a program to obtain the five leading independent low-energy parameters that characterize hadronic parity-violation from few-body observables in one systematic and consistent framework.
  • The two spin-rotation angles provide independent constraints on these parameters.
  • Using naive dimensional analysis to estimate the typical size of the couplings, we expect the signal for standard target densities to be 10^-7 to 10^-6 rad/m for both hydrogen and deuterium targets.

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