Dihadron fragmentation functions in the quark-jet model: Transversely polarized quarks

摘要

Within the most recent extension of the quark-jet hadronization framework, we explore the transversepolarization- dependent dihadron fragmentation functions (DiFFs) H_1~? and H_1~⊥ of a quark into π~+π~? pairs. Monte Carlo (MC) simulations are employed to model polarized quark hadronization and calculate the corresponding number densities. These, in turn, are used to extract the Fourier cosine moments of the DiFFs H_1~? and H_1~⊥ . A notable finding is that there are previously unnoticed apparent discrepancies between the definitions of the so-called interference DiFF (IFF) H_1~? , entering the cross sections for two-hadron semi-inclusive electroproduction, and those involved in the production of two pairs of hadrons from backto- back jets in electron-positron annihilation. This manuscript completes the studies of all four leadingtwist DiFFs for unpolarized hadron pairs within the quark-jet framework, following our previous work on the helicity-dependent DiFF G_1~⊥ .