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

作者：Matevosyan Hrayr H^*; Kotzinian Aram; Thomas Anthony W

来源：PHYSICAL REVIEW D, 2018, 97(1): 014019.

DOI：10.1103/PhysRevD.97.014019

Within the most recent extension of the quark-jet hadronization framework, we explore the transverse-polarization-dependent dihadron fragmentation functions (DiFFs) H-1(measured angle) and H-1(perpendicular to) of a quark into pi(+)pi(-) 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(measured angle) and H-1(perpendicular to). A notable finding is that there are previously unnoticed apparent discrepancies between the definitions of the so-called interference DiFF (IFF) H-1(measured angle), 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)(perpendicular to).

• 出版日期2018-1-26