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arXiv · hep-ex/9906034

Total Forward and Differential Cross Sections of Neutral D Mesons Produced in 500 GeV/c $π^-$-Nucleon Interactions

E791 Collaboration·E. M. Aitala
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Abstract

We measure the neutral D total forward cross section and the differential cross sections as function of Feynman-x ($x_F$) and transverse momentum squared for 500 GeV/c $π^-$-nucleon interactions. The results are obtained from 88990+-460 reconstructed neutral D mesons from Fermilab experiment E791 using the decay channels $D\to K^-π^+$ and $D\to K^-π^+π^-π^+$ (and charge conjugates). We extract fit parameters from the differential cross sections and provide the first direct measurement of the turnover point in the $x_F$ distribution, 0.0131+-0.0038. We measure an absolute $D^0 + \bar{D^0}$ ($x_F > 0$) cross section of 15.4+1.8-2.3 microbarns/nucleon (assuming a linear A dependence). The differential and total forward cross sections are compared to theoretical predictions and to results of previous experiments.

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E791 Collaboration, E. M. Aitala. 1999-06-23. Total Forward and Differential Cross Sections of Neutral D Mesons Produced in 500 GeV/c $π^-$-Nucleon Interactions. https://doi.org/10.1016/s0370-2693(99)00900-4

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