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Polarized hadron pair production from electron-positron annihilation

Pitonyak, D
Schlegel, M
Metz, A
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Journal Article
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2014-03-24
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10.1103/PhysRevD.89.054032
Abstract
We study the production of two almost back-to-back hadrons from the annihilation of an electron and a positron, allowing for the polarization of all particles involved. In particular, we conduct a general (model-independent) structure function decomposition of the cross section for the case e+e-→γ*→hahbX. Moreover, using the parton model we calculate the relevant structure functions in terms of twist-2 transverse momentum dependent (TMD) fragmentation functions (FFs). We also give results for the situation e+e-→Z*→hahbX (including γ-Z interference) within this model. This is the first time a complete framework has been presented for the examination of TMD FFs within e+e-→hahbX. We also specify certain parts of our analysis that hold for the triple-polarized semi-inclusive deep-inelastic scattering process and for di-hadron fragmentation. Furthermore, we give an explicit prescription of how our work can be translated to the Drell-Yan reaction, which provides, for the first time, full results for double-polarized Drell-Yan that include electroweak effects. We further discuss the relevance of our e+e-→hahbX results for future experiments at e+e- machines. © 2014 American Physical Society.
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Physical Review D - Particles, Fields, Gravitation and Cosmology
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