Relative Spin Polarization of Parity-Violating Asymmetries

Details Relative Spin Polarization of Parity-Violating Asymmetries Relative Spin Polarization of Parity-Violating Asymmetries

2008-11-22

arxiv.org/abs/0811.3700v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

Scientific paper

Parity-violating asymmetries in polarized electron scattering have been interpreted as the asymmetries between opposite helicities of incoming fermion based on the approximation of the spin polarization operator. Here exact calculations of cross sections for parity-violating asymmetries in SLAC E158 and SLD have been performed using spin projection operators. And the parity-violating factor incorporating with spin polarization and momentum has been identified and shown that its sign depends on the spin polarization of incoming particle and the relative velocity of incoming and target particles. Therefore, I suggest a new concept of relative spin polarization to interpret the parity-violating asymmetry as contributed by the antisymmetric nature of the weak interactions depending on whether the spin direction of the incoming electron is inward or outward relative to the target electron.

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