The implications of noninertial motion on covariant quantum spin

Details The implications of noninertial motion on covariant quantum spin The implications of noninertial motion on covariant quantum spin

2005-06-19

arxiv.org/abs/hep-th/0506156v3

Class.Quant.Grav.24:2453-2464,2007

Physics

High Energy Physics

High Energy Physics - Theory

REVTeX file; 7 pages; 2 figures; slightly revised with new abstract; accepted for publication in Classical and Quantum Gravity

Scientific paper

10.1088/0264-9381/24/10/002

It is shown that the Pauli-Lubanski spin vector defined in terms of curvilinear co-ordinates does not satisfy Lorentz invariance for spin-1/2 particles in noninertial motion along a curved trajectory. The possibility of detecting this violation in muon decay experiments is explored, where the noninertial contribution to the decay rate becomes large for muon beams with large momenta and trajectories with radius of curvature approaching the muon's Compton wavelength scale. A new spacelike spin vector is derived from the Pauli-Lubanski vector that satisfies Lorentz invariance for both inertial and noninertial motion. In addition, this spin vector suggests a generalization for the classification of spin-1/2 particles, and has interesting properties that are applicable for both massive and massless particles.

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