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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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http://hal.in2p3.fr/in2p3-00009717
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Submitted on : Friday, March 31, 2000 - 9:33:12 AM
Last modification on : Thursday, November 19, 2020 - 12:58:33 PM
Long-term archiving on: : Tuesday, March 30, 2010 - 5:20:09 PM

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  • HAL Id : in2p3-00009717, version 1

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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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