Probing Quark Fragmentation Functions for Spin-1/2 Baryon Production in Unpolarized $e^{+}{e}^{-}$ Annihilation

Abstract

We study the measurement of the quark fragmentation functions for spin-1/2 baryon production ($\Lambda$ and $\bar{\Lambda }$, in particular) in unpolarized $e^{+}{e}^{-}$ annihilation. The spin-dependent fragmentation functions ${\hat{g}}_1(z)$ and ${\hat{h}}_1(z)$ can be probed in the process as a result of quark-antiquark spin correlation and the weak decay of the baryons. The relevant cross section is expressed as a product of the two-jet cross-section, the fragmentation functions, and the differential width of the hyperon decay.

17 pages, ReVTeX with (1 figure available from authors), MIT-CTP: #2365

References in corpus (3)

• Fragmentation of Transversely Polarized Quarks Probed in Transverse Momentum Distributions
• Novel Quark Fragmentation Functions and the Nucleon's Transversity Distribution
• Chiral-Odd and Spin-Dependent Quark Fragmentation Functions and their Applications

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• Final-state Interaction Effects on Inclusive Two-particle Production in Electron-positron Annihilation