Optimal spin-quantization axes for the polarization of dileptons with large transverse momentum

Details Optimal spin-quantization axes for the polarization of dileptons with large transverse momentum Optimal spin-quantization axes for the polarization of dileptons with large transverse momentum

2008-10-24

arxiv.org/abs/0810.4506v2

Phys.Rev.D79:014025,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 1 figure, minor corrections, version published in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.79.014025

The leading-order parton processes that produce a dilepton with large transverse momentum predict that the transverse polarization should increase with the transverse momentum for almost any choice of the quantization axis for the spin of the virtual photon. The rate of approach to complete transverse polarization depends on the choice of spin quantization axis. We propose axes that optimize that rate of approach. They are determined by the momentum of the dilepton and the direction of the jet that provides most of the balancing transverse momentum.

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