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Effects of TMD evolution and partonic flavor on $e^+e^-$ annihilation into hadrons

We calculate the transverse momentum dependence in the production of two back-to-back hadrons in electron-positron annihilations at the medium/large energy scales of BES-III and BELLE experiments. We use the parameters of the transverse-momentum-dependent (TMD) fragmentation functions that were recently extracted from the semi-inclusive deep-inelastic-scattering multiplicities at low energy from HERMES. TMD evolution is applied according to different approaches and using different parameters for the nonperturbative part of the evolution kernel, thus exploring the sensitivity of our results to these different choices and to the flavor dependence of parton fragmentation functions. We discuss how experimental measurements could discriminate among the various scenarios.

preprint2015arXivOpen access
Alessandro BacchettaMiguel G. EchevarriaPiet J. G. MuldersMarco RadiciAndrea Signori
hep-exhep-phnucl-exnucl-th
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Alessandro BacchettaMiguel G. EchevarriaPiet J. G. MuldersMarco RadiciAndrea Signori

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