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

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

1994-10-20

arxiv.org/abs/hep-ph/9410337v1

Nucl.Phys.B445:380-398,1995

Physics

High Energy Physics

High Energy Physics - Phenomenology

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

Scientific paper

10.1016/0550-3213(95)00193-V

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.

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