Production of $\mathrm{\Xi^*}$ resonances in $\mathrm{\Sigma^-}$ induced reactions at 345 GeV/c

The WA89 Collaboration: M.I. Adamovich - et al.

doi:doi:10.1007/s100529900178

EPJ

Production of ${\Xi^*}$ resonances
in ${\Sigma^-}$ induced reactions at 345GeV/c

The WA89 Collaboration

M.I. Adamovich ⁸ - et al.

⁸ Moscow Lebedev Physics Inst., 117924, Moscow, Russia

Received: 3 May 1999 / Published online: 28 September 1999

Abstract
We report on a measurement of the differential and total cross sections of inclusive production of ${\Xi^*}$ resonances in ${\Sigma^-}$ - nucleus collisions at 345 ${GeV/{\mit c}}$ The cross section for inclusive ${\Xi^0_{1530}}$ production is about a factor of 5 below that of ${\Xi^-_{1320}}$ hyperons. The products of cross section and branching ratio for the observed channels ${\Xi^0_{1690}}$ $\to$ ${\Xi^-}$ ${\pi^+}$ ${\Xi^-_{1820}}$ $\to$ ${\Xi^0_{1530}}$ ${\pi^-}$ and ${\Xi^-_{1950}}$ $\to$ ${\Xi^0_{1530}}$ ${\pi^-}$ are lower by yet another order of magnitude. The ${\Xi^-_{1820}}$ and ${\Xi^-_{1950}}$ resonances show significantly harder x_F and p_t distributions than ${\Xi^-}$ and ${\Xi^0_{1530}}$ hyperons. A comparison of the x_F-distribution to PYTHIA and QGSM predictions provides only a partial agreement.

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Production of resonances in induced reactions at 345GeV/c

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Production of ${\Xi^*}$ resonances
in ${\Sigma^-}$ induced reactions at 345GeV/c