Eta Production at High Transverse Momentum by Negative 520 GeV/c Pions Incident on Beryllium and Copper Targets

Thesis/Dissertation · Sat Jan 01 04:00:00 EST 1994

DOI:https://doi.org/10.2172/1372838· OSTI ID:1372838

Roser, Robert Martin ^[1]

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1. Univ. of Rochester, NY (United States)

This thesis presents a measurement of the production of high transverse momentum 17 mesons by a 520 GeV /c $$\sqrt{s}$$ = 31.2) $$\pi^-$$ beam using data collected during the 1990 fixed target run of Fermilab experiment E706. E706 is a second generation fixed target experiment designed to measure direct-photon production in hadron-nucleus collisions. These data provide a clean test of perturbative QCD and serve as a valuable tool for probing hadronic structure. The $$\gamma\gamma$$ decay mode of the $$\eta$$ meson was studied using data from a highly segmented electromagnetic lead liquid argon sampling calorimeter. Results are presented for inclusive $$\eta$$ production by $$\pi^-$$ beams on both beryllium and copper targets. The $$\eta$$ to $$\pi^0$$ production ratio and the nuclear dependence of the $$\eta$$ production cross section are also reported. These results are for $$\eta$$'s in the transverse momentum range 3.5 to 9 Ge V / c and the center of mass rapidity range -0.75 to 0.75, and are the highest energy results ever obtained for inclusive $$\eta$$ production using a $$\pi^-$$ beam.

• 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: 1372838
• Report Number(s): FERMILAB-THESIS--1994-58; UMI--94-25651; 384428
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS