ICHEP2012

Study of inclusive production of $S={}$0, 1, 2, or 3 baryons from $\Upsilon(1,2S)$ at Belle

Not scheduled

1m

Melbourne Convention and Exhibition Centre

Parallel Sessions Track 7. CP Violation, CKM, Rare Decays, Meson Spectroscopy

Speaker

Prof. Youngjoon Kwon (Yonsei University)

Description

Using samples of 102 million $\Upsilon(1S)$ and 158 million $\Upsilon(2S)$ events and about 70 fb${}^{-1}$ of data taken in the nearby continuum with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider, we compare the inclusive production rates of baryons in 3-gluon vs. quark fragmentation processes. The spectra of $p$, $\Lambda$, $\Sigma$, $\Xi$, and $\Omega$ baryons are compared, and we quantify the enhanced production in 3-gluon mechanisms by studying their dependence on strange quark content. Experimental results are compared with Monte Carlo predictions.