Speaker
Zuo-tang Liang
(S)
Description
After a brief description of the three-dimensional fragmentation functions defined via quark-quark correlator for hadrons with different spins (0, 1/2 and 1) at leading and higher twists, we discuss how to study them in hadron production processes in $e^+e^-$ annihilation. We first present the general framework to express the cross section in terms of the corresponding structure functions then give the parton model results for the differential cross sections and/or different spin asymmetries up to twist 3 in terms of gauge invariant fragmentations. The results can serve as a basis for experimental and phenomenological studies in this reaction.
References
[1] Kai-bao Chen, Wei-hua Yang, Shu-yi Wei and Zuo-tang Liang,
“Tensor polarization dependent fragmentation functions and e+e-→VπX ”, in preparation (2016).
[2] Kai-bao Chen, Wei-hua Yang, Shu-yi Wei and Zuo-tang Liang,
“Three dimensional fragmentation functions from quark-quark correlator”,
e-Print: arXiv:1505.02856 [hep-ph].
[3] Shu-yi Wei, Yu-kun Song, and Zuo-tang Liang,
“Leading and higher twist contributions in semi-inclusive e+e- annihilation at high energies”, Phys. Rev. D91, 034015 (2015).
[4] Shu-yi Wei, Yu-kun Song, and Zuo-tang Liang,
“Higher twist contribution to fragmentation function in inclusive hadron production in e+e- annihilation”, Phys. Rev. D89, 014024 (2014).
Author
Zuo-tang Liang
(S)
