24–31 Jul 2009
Wayne State University
US/Eastern timezone

Optimal spin-quantization axes for the polarizations of dileptons and quarkonium with large transverse momentum

31 Jul 2009, 15:40
25m
Wayne State University

Wayne State University

Detroit, Michigan 48201, USA
Perturbative and Non-perturbative QCD QCD II

Speaker

Daekyoung Kang (The Ohio State University)

Description

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. This method also is applied to the polarization of quarkonium.

Author

Daekyoung Kang (The Ohio State University)

Co-authors

Chaehyun Yu (Korea University) Eric Braaten (The Ohio State University) Jungil Lee (Korea University)

Presentation materials