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Determination of the total $c\overline{c}$ production cross section in $340 GeV/c \Sigma^{-}$ - nucleus interactions

Abstract : The production of charmed particles by Sigma- of 340 Gev/c momentum was studied in the hyperon beam experiment WA89 at the CERN-SPS, using the Omega-spectrometer. In two data-taking periods in 1993 and 1994 an integrated luminosity of 1600 microb^-1 on copper and carbon targets was recorded. From the reconstruction of 930 +- 90 charm particle decays in 10 decay channels production cross sections for D, antiD, Ds and Lambdac were determined in the region xF>0. Assuming an A^1 dependence of the cross section on the nucleon number, we calculate a total ccbar production cross section of sigma(x_F > 0) = 5.3+- 0.4(stat)+-1.0(syst)+1.0(Xi_c) microb per nucleon. The last term is an upper limit on the unknown contribution from charmed-strange baryon production.
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Submitted on : Friday, March 31, 2000 - 9:33:12 AM
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  • HAL Id : in2p3-00009717, version 1




M.I. Adamovich, Yu.A. Aleksandrov, D. Barberis, M. Beck, C. Berat, et al.. Determination of the total $c\overline{c}$ production cross section in $340 GeV/c \Sigma^{-}$ - nucleus interactions. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2000, 13, pp.247-254. ⟨in2p3-00009717⟩



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