# Inclusive $\Sigma^+$ and $\Sigma^0$ Production in Hadronic Z Decays

3 CMS
IP2I Lyon - Institut de Physique des 2 Infinis de Lyon
Abstract : We report on measurements of the inclusive production rate of $\Sigma^+$ and $\Sigma^0$ baryons in hadronic Z decays collected with the L3 detector at LEP. The $\Sigma^+$ baryons are detected through the decay $\Sigma^+ \rightarrow {\rm p} \pi^0$, while the $\Sigma^0$ baryons are detected via the decay mode $\Sigma^0 \rightarrow \Lambda \gamma$. The average numbers of $\Sigma^+$ and $\Sigma^0$ per hadronic Z decay are measured to be: \begin{eqnarray*} \left N_{\Sigma^+} \right + \left N_{\bar{\Sigma}^+} \right & = & 0.114 \pm 0.011_{\mbox{\it \small stat}} \pm 0.009_{\mbox{\it \small syst}} \\ \left N_{\Sigma^0} \right + \left N_{\bar{\Sigma}^0} \right & = & 0.095 \pm 0.015_{\mbox{\it \small stat}} \pm 0.013_{\mbox{\it \small syst}} \ \mbox{.} \end{eqnarray*} These rates are found to be higher than the predictions from Monte Carlo hadronization models and analytical parameterizations of strange baryon production.
Document type :
Journal articles

Cited literature [14 references]

http://hal.in2p3.fr/in2p3-00009698
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Submitted on : Monday, July 24, 2000 - 11:57:12 AM
Last modification on : Friday, September 10, 2021 - 1:50:05 PM
Long-term archiving on: : Monday, June 21, 2010 - 4:58:55 PM

### Identifiers

• HAL Id : in2p3-00009698, version 1

### Citation

M. Acciarri, P. Achard, O. Adriani, M. Aguilar-Benitez, J. Alcaraz, et al.. Inclusive $\Sigma^+$ and $\Sigma^0$ Production in Hadronic Z Decays. Physics Letters B, Elsevier, 2000, 479, pp.79-88. ⟨in2p3-00009698⟩

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