Measurements of Two Particle Production in 400-GeV/c Proton - Nucleus Collisions

Thesis/Dissertation · Sat Jul 01 04:00:00 EDT 1978

DOI:https://doi.org/10.2172/1435918· OSTI ID:1435918

Finley, David A. ^[1]

---

1. Purdue U.

Results are presented for an experiment which used a double-arm magnetic spectrometer to perform inclusive measurements of two particle production in 400 GeV/c proton-nucleus collisions. The apparatus detected two particles with an azimuthal separation of ~ 180$$^\circ$$ which were produced near a rapidity of -0.4 in the proton-nucleon center-of-mass system. Charged hadrons ($$\pi^\pm$$, $$K^\pm$$, p, and $$\bar{p})$$, which were produced in polyethylene, beryllium and lead targets, were identified over the transverse momentum range from 1 to 1. 8 GeV/ c. The dependence of the production on the number of nucleons (A) in the target nucleus is parameterized by $$A^\alpha$$, and $$\alpha$$ is observed to be significantly larger than unity. The correlation between the transverse momenta of the two particles is observed to be positive and steeply increasing as the transverse momentum of either particle increases. The correlations among the identities, or quantum numbers, of the particles are found to be positive and significantly large only for $$p\bar{p}$$ and $$K\bar{K}$$ pairs produced in polyethylene or beryllium targets. These quantum number correlations are independent of the transverse momentum of the particles in the range $$1 \leq p_{\perp} \leq$$ 1.8 GeV/c. Both the transverse momentum and quantum number correlations are very much reduced by using a lead target.

• 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: 1435918
• Report Number(s): FERMILAB-THESIS-1978-02; UMI-79-05718; 133236
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS