A Dependence of Charmed Meson Production (in Portuguese)
- Rio de Janeiro, CBPF
One report is presented of a recent direct measurement of the nucleon number (A) dependence of the production cross sections for the charmed mesons $D^0$ and $D^+$ using $$\pi^+_{-}$$ and $$K^+_{-}$$ beams incident on a segmented target of Be, Al, Cu and W. The data derive from the experiment E769 - Hadroproductlon of Charm at Fermilab. The experimental apparatus is described together with the following analysis. Starting from a sample of -1500 D mesons in the range of $$O< x_{f} <1$$, the data are found to be well described by the parameterization $$\sigma_{A}$$ = $$\sigma_{O}$$ , with $$\alpha = 0.99 \pm 0.03$$. The $$x_f$$ dependence of $$\alpha$$ is examined and the results obtained are compared with those of other .experiments and wl th -theoretical expectations based on perturbatlve QCD and on an EMC like model of nuclear shadowing
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1425817
- Report Number(s):
- FERMILAB-THESIS-1992-01; 349971
- Country of Publication:
- United States
- Language:
- Portuguese
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