Theoretical and experimental investigation of D. C.-pumped cyclotron-wave amplifiers

Bass, J.C.; Rickard, D.C.; Wilson, M.G.F.

doi:10.1007/978-1-349-00447-8_45

Cited by 1 publication

(1 citation statement)

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“…The PV components of the neutron spin rotation angle from the liquid target therefore possess opposite signs on each side of the beam, and the difference of the two rotation angles is insensitive to both static residual magnetic fields and any common-mode timedependent magnetic field integrals seen by the neutrons along their trajectories in the target. The experiment, apparatus, and analysis of systematic errors has been described in detail elsewhere [20][21][22][23][24].…”

Section: Experimental Technique Measurement and Resultsmentioning

confidence: 99%

New Limit on Possible Long-Range Parity-Odd Interactions of the Neutron from Neutron-Spin Rotation in LiquidHe4

Yan

Snow

2013

Phys. Rev. Lett.

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Various theories beyond the Standard Model predict new particles with masses in the sub-eV range with very weak couplings to ordinary matter. A parity-odd interaction between polarized nucleons and unpolarized matter proportional to gV gA s · p is one such possibility, where s and p are the spin and the momentum of the polarized nucleon, and gV and gA are the vector and axial vector couplings of an interaction induced by the exchange of a new light vector boson. We report a new experimental upper bound on such possible long-range parity-odd interactions of the neutron with nucleons and electrons from a recent search for parity violation in neutron spin rotation in liquid 4 He. Our constraint on the product of vector and axial vector couplings of a possible new light vector boson is gV g n A ≤ 10 −32 for an interaction range of 1m. This upper bound is more than seven orders of magnitude more stringent than the existing laboratory constraints for interaction ranges below 1m, corresponding to a broad range of vector boson masses above 10 −6 eV. More sensitive searches for a gV g n A coupling could be performed using neutron spin rotation measurements in heavy nuclei or through analysis of experiments conducted to search for nucleon-nucleon weak interactions and nuclear anapole moments.

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Section: Experimental Technique Measurement and Resultsmentioning

confidence: 99%