Charge Density of a Positively Charged Vector Boson May Be Negative
- School of Physics, University of New South Wales, Sydney 2052 (Australia)
The charge density of vector particles, for example W{sup {+-}}, may change sign. The effect manifests itself even for a free propagation, when the energy of the W-boson satisfies {epsilon}>{radical}(2)m and the standing wave is considered. The charge density of W also changes sign in a vicinity of a Coulomb center. For an arbitrary vector boson (e.g., for spin 1 mesons), this effect depends on the g-factor. An origin of this surprising effect is traced to the electric quadrupole moment and spin-orbit interaction of vector particles; their contributions to the current have a polarization nature. The corresponding charge density equals {rho}{sub Pol}=-{nabla}{center_dot}P, where P is an effective polarization vector that depends on the quadrupole moment and spin-orbit interaction. This density oscillates in space, producing zero contribution to the total charge.
- OSTI ID:
- 20951332
- Journal Information:
- Physical Review Letters, Vol. 98, Issue 18; Other Information: DOI: 10.1103/PhysRevLett.98.181805; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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