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

Aitala, E. M

doi:10.1016/S0370-2693(99)00900-4

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

Journal Article · Tue Jun 01 04:00:00 EDT 1999 · Phys.Lett.B

DOI:https://doi.org/10.1016/S0370-2693(99)00900-4· OSTI ID:1847792

Aitala, E. M

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 $$\pi^-$$-nucleon interactions. The results are obtained from 88990+-460 reconstructed neutral D mesons from Fermilab experiment E791 using the decay channels $$D\to K^-\pi^+$$ and $$D\to K^-\pi^+\pi^-\pi^+$$ (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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Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

Contributing Organization:: E791

DOE Contract Number:: AC02-07CH11359

OSTI ID:: 1847792

Report Number(s):: FERMILAB-PUB-99-185-E; arXiv:hep-ex/9906034; oai:inspirehep.net:502166

Journal Information:: Phys.Lett.B, Journal Name: Phys.Lett.B Vol. 462

Country of Publication:: United States

Language:: English

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