The Feynman $$x$$ Dependence of $$D^{\pm}$$ Mesons in $$\pi^-$$ Nucleon Interactions
- Yale U.
The xp distribution of $$D^{\pm}$$ was measured from Fermilab experiment E769 using the decay mode $$D^{\pm} \to K^{\mp} \pi^{\pm} \pi^{\pm}$$. The experiment was performed using a 250 GeV tagged hadron beam incident on thin target foils of Be, Al, Cu and W. The measurement was based 554 ± 33 reconstructed $$D^{\pm}$$ mesons from 200 million triggers induced by a 7r- beam. Fitting the distribution to the form $$C(1 - \mid x_f \mid)^n$$, the fit parameter $$n$$ was determined to be 3.21 ± 0.24. However, we observed no significant leading particle effect suggested by earlier experiments. We also observed that the $$X_F$$ distribution does not dramatically depend on atomic number. Our result is consistent with the perturbative QCD predictions.
- Research Organization:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1426704
- Report Number(s):
- FERMILAB-THESIS-1991-02; UMI-92-21459; 322635
- Country of Publication:
- United States
- Language:
- English
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