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A Measurement of Neutral Meson and Direct Photon Production at Large Transverse Momentum

Thesis/Dissertation ·
DOI:https://doi.org/10.2172/1433890· OSTI ID:1433890
Inclusive cross sections for $$\pi^0$$ and $$\eta$$ production near 90° in the center of mass at transverse momenta ($$P_T$$) between 2.1 and 5 GeV/c have been measured in 200 GeV/c $$\pi^+$$ and proton collisions with beryllium, carbon, and aluminum targets. These cross sections rise with increasing nucleon number (A) of the target nucleus as with $$A^{\alpha}$$ with $$\alpha$$>1. The ratio of the $$\pi^0$$ yields in pA and $$\pi^+$$ collisions decreases with increasing $$P_T$$· The inclusive production of direct photons has been measured for the same kinematic region in 200 GeV/c $$\pi^+$$ and proton collisions on a carbon target. A significant direct photon yield is observed for $$P_T$$>2.5 GeV/c....
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:
1433890
Report Number(s):
FERMILAB-THESIS-1984-27; RX-1056 (MINNESOTA); 202919
Country of Publication:
United States
Language:
English

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