Study of ~500-GeV π^⁻p Interactions in the 30" HBC

Technical Report · Sat Dec 01 04:00:00 EST 1973

DOI:https://doi.org/10.2172/1847799· OSTI ID:1847799

Bingham, H. H. ^[1]; Fretter, W. B. ^[2]

---

1. Univ. of California, Berkeley, CA (United States)
2. Univ. of California, Berkeley, CA (United States); et al.

Tests in the 30" hydrogen bubble chamber beam indicate that π^⁻ of up to ~96% of the accelerated proton momentum can be obtained with fluxes sufficient for bubble chamber running. Thus with the machine at -500 GeV it should be possible to do an exploratory π^⁻ run at -480 GeV. The richness and importance of the 30" hydrogen bubble chamber experiments done so far, including our 205 GeV π^⁻p run (experiment No. 137) have amply demonstrated that an exploratory HBC run at the highest available π^⁻ energy should be done with highest priority. We therefore request an exposure in the 30" HBC of at least 50,000 photos at the highest π^⁻ momentum obtainable (near 500 GeV). Such an exposure should yield some 5,000 events with which we can measure the π^⁻p total cross section (to ~±2% including systematic errors). Measurement of the total cross section at the highest possible pion energy is of great importance to determine whether or not it rises with energy as observed for the pp cross section. The nearly 500 GeV pion beam available at NAL is unique in this respect.

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: US Atomic Energy Commission (AEC)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1847799
• Report Number(s): FERMILAB-PROPOSAL-0274; oai:inspirehep.net:88164
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS