Total forward and differential cross sections of neutral D mesons produced in 500 GeV/c π--nucleon interactions E791 Collaboration

E. M. Aitala*, S. Amato, J. C. Anjos, J. A. Appel, D. Ashery, S. Banerjee, I. Bediaga, G. Blaylock, S. B. Bracker, P. R. Burchat, R. A. Burnstein, T. Carter, H. S. Carvalho, N. K. Copty, L. M. Cremaldi, C. Darling, K. Denisenko, S. Devmal, A. Fernandez, G. F. FoxP. Gagnon, C. Gobel, K. Gounder, A. M. Halling, G. Herrera, G. Hurvits, C. James, P. A. Kasper, S. Kwan, D. C. Langs, J. Leslie, B. Lundberg, J. Magnin, S. MayTal-Beck, B. Meadows, J. R.T. De Mello Neto, D. Mihalcea, R. H. Milburn, J. M. De Miranda, A. Napier, A. Nguyen, A. B. D'Oliveira, K. O'Shaughnessy, K. C. Peng, L. P. Perera, M. V. Purohit, B. Quinn, S. Radeztsky, A. Rafatian, N. W. Reay, J. J. Reidy, A. C. Dos Reis, H. A. Rubin, D. A. Sanders, A. K.S. Santha, A. F.S. Santoro, A. J. Schwartz, M. Sheaff, R. A. Sidwell, A. J. Slaughter, M. D. Sokoloff, J. Solano, N. R. Stanton, R. J. Stefanski, K. Stenson, D. J. Summers, S. Takach, K. Thorne, A. K. Tripathi, S. Watanabe, R. Weiss-Babai, J. Wiener, N. Witchey, E. Wolin, S. M. Yang, D. Yi, S. Yoshida, R. Zaliznyak, C. Zhang

*Corresponding author for this work

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14 Scopus citations

Abstract

We measure the neutral D total forward cross section and the differential cross sections as functions of Feynman-x (xF) and transverse momentum squared for 500 GeV/c π--nucleon interactions. The results are obtained from 88 990 ± 460 reconstructed neutral D mesons from Fermilab experiment E791 using the decay channels D0 → K- π+ and D0 → 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 xF distribution, 0.0131 ± 0.0038. We measure an absolute D0 + D̄0 (XF > 0) cross section of 15.4-2.3+1.8 μbarn/nucleon (assuming a linear A dependence). The differential and total forward cross sections are compared to theoretical predictions and to results of previous experiments.

Original languageEnglish
Pages (from-to)225-236
Number of pages12
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume462
Issue number1-2
DOIs
StatePublished - 1999

Funding

FundersFunder number
Conselho Nacional de Desenvolvimento Cientı́fico e Technológico
Israeli Academy of Sciences and Humanities
US Department of Energy
US National Science Foundation
US-Israel Binational Science Foundation
Consejo Nacional de Ciencia y Tecnología

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