Massive $$\pi^0\pi^0$$, $$pi^{0-}\pi^-$$, and $$\pi^{0-}\pi^+$$ Production from 515 GeV/c $$\pi^-$$ Collisions with Beryllium and Copper Targets
- Northeastern Univ., Boston, MA (United States)
This thesis presents the measurement of high mass $$\pi^0\pi^0$$ and $$\pi^0\pi^{\pm}$$ production by a 515 GeV/c $$\pi^-$$ beam on Be and Cu targets at Fermilab experiment E706. The data correspond to an integrated luminosity of $$\sim$$ 8.6 events/pb on Be and. of $$\sim$$ 1.4 events/pb on Cu for the 1990 fixed target run. These high mass di-$$\pi$$ states, produced near 90° in the $$\pi^-$$ - nucleus center of mass frame, cover the mass range from 4 to 18 GeV /c2 with the parton-parton scattering angle up to cosB* = 0.5. This thesis reports the mass differential di-$$\pi$$ cross sections as well as the study of the di-$$\pi$$ angular correlations in comparison with QCD predictions. Results from the structure of particles produced in association with these $$\pi$$'s are also discussed. A nuclear enhancement of the di-$$\pi$$ events is observed and the results are presented in comparison with the data from other experiments.
- 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:
- 1372376
- Report Number(s):
- FERMILAB-THESIS-1994-67; 390852
- Country of Publication:
- United States
- Language:
- English
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